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boost-1.32
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</head>
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<body>
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<body>
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<div class="document" id="bidirectional-traversal-concept">
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<h1 class="title">Bidirectional Traversal Concept</h1>
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<h1 class="title">Bidirectional Traversal Concept</h1>
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<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
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<div class="document" id="bidirectional-traversal-concept">
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<!-- Software License, Version 1.0. (See accompanying -->
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<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Bidirectional Traversal</em>
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<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
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concept if, in addition to <tt class="literal"><span class="pre">X</span></tt> meeting the requirements of Forward
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<p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Bidirectional Traversal</em>
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concept if, in addition to <tt class="docutils literal"><span class="pre">X</span></tt> meeting the requirements of Forward
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Traversal Iterator, the following expressions are valid and respect
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Traversal Iterator, the following expressions are valid and respect
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the stated semantics.</p>
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the stated semantics.</p>
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<table border="1" class="docutils">
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<thead valign="bottom">
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<tr><th class="head" colspan="3">Bidirectional Traversal Iterator Requirements (in addition to Forward Traversal
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<tr><th colspan="3">Bidirectional Traversal Iterator Requirements (in addition to Forward Traversal
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Iterator)</th>
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Iterator)</th>
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<tr><th class="head">Expression</th>
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<th class="head">Return Type</th>
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<th class="head">Assertion/Semantics /
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<th>Assertion/Semantics /
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Pre-/Post-condition</th>
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<tr><td><tt class="docutils literal"><span class="pre">--r</span></tt></td>
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<tr><td><tt class="literal"><span class="pre">--r</span></tt></td>
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<td><tt class="docutils literal"><span class="pre">X&</span></tt></td>
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implies <tt class="literal"><span class="pre">r</span> <span class="pre">==</span>
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<span class="pre">s</span></tt>. <tt class="literal"><span class="pre">&r</span> <span class="pre">==</span> <span class="pre">&--r</span></tt>.</td>
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<tr><td><tt class="docutils literal"><span class="pre">r--</span></tt></td>
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<tr><td><tt class="literal"><span class="pre">r--</span></tt></td>
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<td>convertible to <tt class="docutils literal"><span class="pre">const</span> <span class="pre">X&</span></tt></td>
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<td>convertible to <tt class="literal"><span class="pre">const</span> <span class="pre">X&</span></tt></td>
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<td><pre class="first last literal-block">
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<td><pre class="first last literal-block">
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{
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{
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X tmp = r;
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@ -339,13 +54,18 @@ implies <tt class="docutils literal"><span class="pre">r</span> <span class="pre
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</td>
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<tr><td><tt class="docutils literal"><span class="pre">iterator_traversal<X>::type</span></tt></td>
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<tr><td><tt class="literal"><span class="pre">iterator_traversal<X>::type</span></tt></td>
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<td>Convertible to
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<td>Convertible to
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<tt class="docutils literal"><span class="pre">bidirectional_traversal_tag</span></tt></td>
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<tt class="literal"><span class="pre">bidirectional_traversal_tag</span></tt></td>
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<td> </td>
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<td> </td>
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<hr class="footer" />
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<div class="footer">
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<a class="reference" href="BidirectionalTraversal.rst">View document source</a>.
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.. Copyright David Abrahams 2006. Distributed under the Boost
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.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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Bidirectional Traversal Concept
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Bidirectional Traversal Concept
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|
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|
||||||
<div class="document" id="forward-traversal-concept">
|
|
||||||
<h1 class="title">Forward Traversal Concept</h1>
|
<h1 class="title">Forward Traversal Concept</h1>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
<div class="document" id="forward-traversal-concept">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Forward Traversal</em>
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
concept if, in addition to <tt class="literal"><span class="pre">X</span></tt> meeting the requirements of Default
|
||||||
<p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Forward Traversal</em>
|
|
||||||
concept if, in addition to <tt class="docutils literal"><span class="pre">X</span></tt> meeting the requirements of Default
|
|
||||||
Constructible and Single Pass Iterator, the following expressions are
|
Constructible and Single Pass Iterator, the following expressions are
|
||||||
valid and respect the stated semantics.</p>
|
valid and respect the stated semantics.</p>
|
||||||
<table border="1" class="docutils">
|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
<thead valign="bottom">
|
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|
||||||
<tr><th class="head" colspan="3">Forward Traversal Iterator Requirements (in addition to Default Constructible and Single Pass Iterator)</th>
|
<tr><th colspan="3">Forward Traversal Iterator Requirements (in addition to Default Constructible and Single Pass Iterator)</th>
|
||||||
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|
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|
||||||
<tr><th class="head">Expression</th>
|
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|
||||||
<th class="head">Return Type</th>
|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
<tr><td><tt class="docutils literal"><span class="pre">X</span> <span class="pre">u;</span></tt></td>
|
<tr><td><tt class="literal"><span class="pre">X</span> <span class="pre">u;</span></tt></td>
|
||||||
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|
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|
||||||
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|
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|
||||||
singular value.</td>
|
singular value.</td>
|
||||||
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|
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|
||||||
<tr><td><tt class="docutils literal"><span class="pre">++r</span></tt></td>
|
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|
||||||
<td><tt class="docutils literal"><span class="pre">X&</span></tt></td>
|
<td><tt class="literal"><span class="pre">X&</span></tt></td>
|
||||||
<td><tt class="docutils literal"><span class="pre">r</span> <span class="pre">==</span> <span class="pre">s</span></tt> and <tt class="docutils literal"><span class="pre">r</span></tt> is
|
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|
||||||
dereferenceable implies
|
dereferenceable implies
|
||||||
<tt class="docutils literal"><span class="pre">++r</span> <span class="pre">==</span> <span class="pre">++s.</span></tt></td>
|
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|
||||||
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|
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|
||||||
<tr><td><tt class="docutils literal"><span class="pre">iterator_traits<X>::difference_type</span></tt></td>
|
<tr><td><tt class="literal"><span class="pre">iterator_traits<X>::difference_type</span></tt></td>
|
||||||
<td>A signed integral type representing
|
<td>A signed integral type representing
|
||||||
the distance between iterators</td>
|
the distance between iterators</td>
|
||||||
<td> </td>
|
<td> </td>
|
||||||
</tr>
|
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|
||||||
<tr><td><tt class="docutils literal"><span class="pre">iterator_traversal<X>::type</span></tt></td>
|
<tr><td><tt class="literal"><span class="pre">iterator_traversal<X>::type</span></tt></td>
|
||||||
<td>Convertible to
|
<td>Convertible to
|
||||||
<tt class="docutils literal"><span class="pre">forward_traversal_tag</span></tt></td>
|
<tt class="literal"><span class="pre">forward_traversal_tag</span></tt></td>
|
||||||
<td> </td>
|
<td> </td>
|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
</div>
|
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|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="ForwardTraversal.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
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|
||||||
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|
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|
||||||
</html>
|
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|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
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||||||
|
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||||||
Forward Traversal Concept
|
Forward Traversal Concept
|
||||||
.........................
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.........................
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|
||||||
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|
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|
||||||
<body>
|
<body>
|
||||||
<div class="document" id="incrementable-iterator-concept">
|
|
||||||
<h1 class="title">Incrementable Iterator Concept</h1>
|
<h1 class="title">Incrementable Iterator Concept</h1>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
<div class="document" id="incrementable-iterator-concept">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Incrementable Iterator</em>
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
concept if, in addition to <tt class="literal"><span class="pre">X</span></tt> being Assignable and Copy
|
||||||
<p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Incrementable Iterator</em>
|
|
||||||
concept if, in addition to <tt class="docutils literal"><span class="pre">X</span></tt> being Assignable and Copy
|
|
||||||
Constructible, the following expressions are valid and respect the
|
Constructible, the following expressions are valid and respect the
|
||||||
stated semantics.</p>
|
stated semantics.</p>
|
||||||
<table border="1" class="docutils">
|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
<thead valign="bottom">
|
<thead valign="bottom">
|
||||||
<tr><th class="head" colspan="3">Incrementable Iterator Requirements (in addition to Assignable, Copy Constructible)</th>
|
<tr><th colspan="3">Incrementable Iterator Requirements (in addition to Assignable, Copy Constructible)</th>
|
||||||
</tr>
|
</tr>
|
||||||
<tr><th class="head">Expression</th>
|
<tr><th>Expression</th>
|
||||||
<th class="head">Return Type</th>
|
<th>Return Type</th>
|
||||||
<th class="head">Assertion/Semantics</th>
|
<th>Assertion/Semantics</th>
|
||||||
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|
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|
||||||
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|
</thead>
|
||||||
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|
<tbody valign="top">
|
||||||
<tr><td><tt class="docutils literal"><span class="pre">++r</span></tt></td>
|
<tr><td><tt class="literal"><span class="pre">++r</span></tt></td>
|
||||||
<td><tt class="docutils literal"><span class="pre">X&</span></tt></td>
|
<td><tt class="literal"><span class="pre">X&</span></tt></td>
|
||||||
<td><tt class="docutils literal"><span class="pre">&r</span> <span class="pre">==</span> <span class="pre">&++r</span></tt></td>
|
<td><tt class="literal"><span class="pre">&r</span> <span class="pre">==</span> <span class="pre">&++r</span></tt></td>
|
||||||
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|
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|
||||||
<tr><td><tt class="docutils literal"><span class="pre">r++</span></tt></td>
|
<tr><td><tt class="literal"><span class="pre">r++</span></tt></td>
|
||||||
<td><tt class="docutils literal"><span class="pre">X</span></tt></td>
|
<td><tt class="literal"><span class="pre">X</span></tt></td>
|
||||||
<td><pre class="first last literal-block">
|
<td><pre class="first last literal-block">
|
||||||
{
|
{
|
||||||
X tmp = r;
|
X tmp = r;
|
||||||
@ -329,13 +44,18 @@ stated semantics.</p>
|
|||||||
</pre>
|
</pre>
|
||||||
</td>
|
</td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr><td><tt class="docutils literal"><span class="pre">iterator_traversal<X>::type</span></tt></td>
|
<tr><td><tt class="literal"><span class="pre">iterator_traversal<X>::type</span></tt></td>
|
||||||
<td>Convertible to
|
<td>Convertible to
|
||||||
<tt class="docutils literal"><span class="pre">incrementable_traversal_tag</span></tt></td>
|
<tt class="literal"><span class="pre">incrementable_traversal_tag</span></tt></td>
|
||||||
<td> </td>
|
<td> </td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
</div>
|
</div>
|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="IncrementableIterator.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
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|
||||||
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|
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|
||||||
</html>
|
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|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
Incrementable Iterator Concept
|
Incrementable Iterator Concept
|
||||||
..............................
|
..............................
|
||||||
|
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
Interoperable Iterator Concept
|
Interoperable Iterator Concept
|
||||||
..............................
|
..............................
|
||||||
|
|
||||||
|
|||||||
@ -1,20 +0,0 @@
|
|||||||
# Copyright Thomas Witt 2005. Use, modification, and distribution are
|
|
||||||
# subject to the Boost Software License, Version 1.0. (See accompanying
|
|
||||||
# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
using quickbook ;
|
|
||||||
|
|
||||||
xml iterator
|
|
||||||
:
|
|
||||||
quickbook/iterator.qbk
|
|
||||||
;
|
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|
||||||
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|
|
||||||
</head>
|
</head>
|
||||||
<body>
|
<body>
|
||||||
<div class="document" id="lvalue-iterator-concept">
|
|
||||||
<h1 class="title">Lvalue Iterator Concept</h1>
|
<h1 class="title">Lvalue Iterator Concept</h1>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
<div class="document" id="lvalue-iterator-concept">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<p>The <em>Lvalue Iterator</em> concept adds the requirement that the return
|
<p>The <em>Lvalue Iterator</em> concept adds the requirement that the return
|
||||||
type of <tt class="docutils literal"><span class="pre">operator*</span></tt> type be a reference to the value type of the
|
type of <tt class="literal"><span class="pre">operator*</span></tt> type be a reference to the value type of the
|
||||||
iterator.</p>
|
iterator.</p>
|
||||||
<table border="1" class="docutils">
|
<table border="1" class="table">
|
||||||
<colgroup>
|
<colgroup>
|
||||||
<col width="22%" />
|
<col width="22%" />
|
||||||
<col width="19%" />
|
<col width="19%" />
|
||||||
<col width="59%" />
|
<col width="59%" />
|
||||||
</colgroup>
|
</colgroup>
|
||||||
<thead valign="bottom">
|
<thead valign="bottom">
|
||||||
<tr><th class="head" colspan="3">Lvalue Iterator Requirements</th>
|
<tr><th colspan="3">Lvalue Iterator Requirements</th>
|
||||||
</tr>
|
</tr>
|
||||||
<tr><th class="head">Expression</th>
|
<tr><th>Expression</th>
|
||||||
<th class="head">Return Type</th>
|
<th>Return Type</th>
|
||||||
<th class="head">Note/Assertion</th>
|
<th>Note/Assertion</th>
|
||||||
</tr>
|
</tr>
|
||||||
</thead>
|
</thead>
|
||||||
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|
<tbody valign="top">
|
||||||
<tr><td><tt class="docutils literal"><span class="pre">*a</span></tt></td>
|
<tr><td><tt class="literal"><span class="pre">*a</span></tt></td>
|
||||||
<td><tt class="docutils literal"><span class="pre">T&</span></tt></td>
|
<td><tt class="literal"><span class="pre">T&</span></tt></td>
|
||||||
<td><tt class="docutils literal"><span class="pre">T</span></tt> is <em>cv</em>
|
<td><tt class="literal"><span class="pre">T</span></tt> is <em>cv</em>
|
||||||
<tt class="docutils literal"><span class="pre">iterator_traits<X>::value_type</span></tt>
|
<tt class="literal"><span class="pre">iterator_traits<X>::value_type</span></tt>
|
||||||
where <em>cv</em> is an optional
|
where <em>cv</em> is an optional
|
||||||
cv-qualification.
|
cv-qualification.
|
||||||
pre: <tt class="docutils literal"><span class="pre">a</span></tt> is
|
pre: <tt class="literal"><span class="pre">a</span></tt> is
|
||||||
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|
dereferenceable. If <tt class="literal"><span class="pre">a</span>
|
||||||
<span class="pre">==</span> <span class="pre">b</span></tt> then <tt class="docutils literal"><span class="pre">*a</span></tt> is
|
<span class="pre">==</span> <span class="pre">b</span></tt> then <tt class="literal"><span class="pre">*a</span></tt> is
|
||||||
equivalent to <tt class="docutils literal"><span class="pre">*b</span></tt>.</td>
|
equivalent to <tt class="literal"><span class="pre">*b</span></tt>.</td>
|
||||||
</tr>
|
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|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
</div>
|
</div>
|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="LvalueIterator.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
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|
||||||
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|
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|
||||||
</html>
|
</html>
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
Lvalue Iterator Concept
|
Lvalue Iterator Concept
|
||||||
.......................
|
.......................
|
||||||
|
|
||||||
|
|||||||
@ -3,304 +3,19 @@
|
|||||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
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|
||||||
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|
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|
||||||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||||||
<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
|
||||||
<title>Random Access Traversal Concept</title>
|
<title>Random Access Traversal Concept</title>
|
||||||
<style type="text/css">
|
<link rel="stylesheet" href="default.css" type="text/css" />
|
||||||
|
|
||||||
/*
|
|
||||||
:Author: David Goodger
|
|
||||||
:Contact: goodger@users.sourceforge.net
|
|
||||||
:Date: $Date$
|
|
||||||
:Revision: $Revision$
|
|
||||||
:Copyright: This stylesheet has been placed in the public domain.
|
|
||||||
|
|
||||||
Default cascading style sheet for the HTML output of Docutils.
|
|
||||||
|
|
||||||
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|
|
||||||
customize this style sheet.
|
|
||||||
*/
|
|
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|
|
||||||
/* used to remove borders from tables and images */
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|
|
||||||
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|
|
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|
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|
|
||||||
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|
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|
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|
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|
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|
|
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|
||||||
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|
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|
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|
|
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|
|
||||||
</style>
|
|
||||||
</head>
|
</head>
|
||||||
<body>
|
<body>
|
||||||
<div class="document" id="random-access-traversal-concept">
|
|
||||||
<h1 class="title">Random Access Traversal Concept</h1>
|
<h1 class="title">Random Access Traversal Concept</h1>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
<div class="document" id="random-access-traversal-concept">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Random Access Traversal</em>
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Random Access Traversal</em>
|
|
||||||
concept if the following expressions are valid and respect the stated
|
concept if the following expressions are valid and respect the stated
|
||||||
semantics. In the table below, <tt class="docutils literal"><span class="pre">Distance</span></tt> is
|
semantics. In the table below, <tt class="literal"><span class="pre">Distance</span></tt> is
|
||||||
<tt class="docutils literal"><span class="pre">iterator_traits<X>::difference_type</span></tt> and <tt class="docutils literal"><span class="pre">n</span></tt> represents a
|
<tt class="literal"><span class="pre">iterator_traits<X>::difference_type</span></tt> and <tt class="literal"><span class="pre">n</span></tt> represents a
|
||||||
constant object of type <tt class="docutils literal"><span class="pre">Distance</span></tt>.</p>
|
constant object of type <tt class="literal"><span class="pre">Distance</span></tt>.</p>
|
||||||
<table border="1" class="docutils">
|
<table border="1" class="table">
|
||||||
<colgroup>
|
<colgroup>
|
||||||
<col width="28%" />
|
<col width="28%" />
|
||||||
<col width="30%" />
|
<col width="30%" />
|
||||||
@ -308,18 +23,18 @@ constant object of type <tt class="docutils literal"><span class="pre">Distance<
|
|||||||
<col width="20%" />
|
<col width="20%" />
|
||||||
</colgroup>
|
</colgroup>
|
||||||
<thead valign="bottom">
|
<thead valign="bottom">
|
||||||
<tr><th class="head" colspan="4">Random Access Traversal Iterator Requirements (in addition to Bidirectional Traversal)</th>
|
<tr><th colspan="4">Random Access Traversal Iterator Requirements (in addition to Bidirectional Traversal)</th>
|
||||||
</tr>
|
</tr>
|
||||||
<tr><th class="head">Expression</th>
|
<tr><th>Expression</th>
|
||||||
<th class="head">Return Type</th>
|
<th>Return Type</th>
|
||||||
<th class="head">Operational Semantics</th>
|
<th>Operational Semantics</th>
|
||||||
<th class="head">Assertion/
|
<th>Assertion/
|
||||||
Precondition</th>
|
Precondition</th>
|
||||||
</tr>
|
</tr>
|
||||||
</thead>
|
</thead>
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr><td><tt class="docutils literal"><span class="pre">r</span> <span class="pre">+=</span> <span class="pre">n</span></tt></td>
|
<tr><td><tt class="literal"><span class="pre">r</span> <span class="pre">+=</span> <span class="pre">n</span></tt></td>
|
||||||
<td><tt class="docutils literal"><span class="pre">X&</span></tt></td>
|
<td><tt class="literal"><span class="pre">X&</span></tt></td>
|
||||||
<td><pre class="first last literal-block">
|
<td><pre class="first last literal-block">
|
||||||
{
|
{
|
||||||
Distance m = n;
|
Distance m = n;
|
||||||
@ -335,75 +50,80 @@ Precondition</th>
|
|||||||
</td>
|
</td>
|
||||||
<td> </td>
|
<td> </td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr><td><tt class="docutils literal"><span class="pre">a</span> <span class="pre">+</span> <span class="pre">n</span></tt>, <tt class="docutils literal"><span class="pre">n</span> <span class="pre">+</span> <span class="pre">a</span></tt></td>
|
<tr><td><tt class="literal"><span class="pre">a</span> <span class="pre">+</span> <span class="pre">n</span></tt>, <tt class="literal"><span class="pre">n</span> <span class="pre">+</span> <span class="pre">a</span></tt></td>
|
||||||
<td><tt class="docutils literal"><span class="pre">X</span></tt></td>
|
<td><tt class="literal"><span class="pre">X</span></tt></td>
|
||||||
<td><tt class="docutils literal"><span class="pre">{</span> <span class="pre">X</span> <span class="pre">tmp</span> <span class="pre">=</span> <span class="pre">a;</span> <span class="pre">return</span> <span class="pre">tmp</span>
|
<td><tt class="literal"><span class="pre">{</span> <span class="pre">X</span> <span class="pre">tmp</span> <span class="pre">=</span> <span class="pre">a;</span> <span class="pre">return</span> <span class="pre">tmp</span>
|
||||||
<span class="pre">+=</span> <span class="pre">n;</span> <span class="pre">}</span></tt></td>
|
<span class="pre">+=</span> <span class="pre">n;</span> <span class="pre">}</span></tt></td>
|
||||||
<td> </td>
|
<td> </td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr><td><tt class="docutils literal"><span class="pre">r</span> <span class="pre">-=</span> <span class="pre">n</span></tt></td>
|
<tr><td><tt class="literal"><span class="pre">r</span> <span class="pre">-=</span> <span class="pre">n</span></tt></td>
|
||||||
<td><tt class="docutils literal"><span class="pre">X&</span></tt></td>
|
<td><tt class="literal"><span class="pre">X&</span></tt></td>
|
||||||
<td><tt class="docutils literal"><span class="pre">return</span> <span class="pre">r</span> <span class="pre">+=</span> <span class="pre">-n</span></tt></td>
|
<td><tt class="literal"><span class="pre">return</span> <span class="pre">r</span> <span class="pre">+=</span> <span class="pre">-n</span></tt></td>
|
||||||
<td> </td>
|
<td> </td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr><td><tt class="docutils literal"><span class="pre">a</span> <span class="pre">-</span> <span class="pre">n</span></tt></td>
|
<tr><td><tt class="literal"><span class="pre">a</span> <span class="pre">-</span> <span class="pre">n</span></tt></td>
|
||||||
<td><tt class="docutils literal"><span class="pre">X</span></tt></td>
|
<td><tt class="literal"><span class="pre">X</span></tt></td>
|
||||||
<td><tt class="docutils literal"><span class="pre">{</span> <span class="pre">X</span> <span class="pre">tmp</span> <span class="pre">=</span> <span class="pre">a;</span> <span class="pre">return</span> <span class="pre">tmp</span>
|
<td><tt class="literal"><span class="pre">{</span> <span class="pre">X</span> <span class="pre">tmp</span> <span class="pre">=</span> <span class="pre">a;</span> <span class="pre">return</span> <span class="pre">tmp</span>
|
||||||
<span class="pre">-=</span> <span class="pre">n;</span> <span class="pre">}</span></tt></td>
|
<span class="pre">-=</span> <span class="pre">n;</span> <span class="pre">}</span></tt></td>
|
||||||
<td> </td>
|
<td> </td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr><td><tt class="docutils literal"><span class="pre">b</span> <span class="pre">-</span> <span class="pre">a</span></tt></td>
|
<tr><td><tt class="literal"><span class="pre">b</span> <span class="pre">-</span> <span class="pre">a</span></tt></td>
|
||||||
<td><tt class="docutils literal"><span class="pre">Distance</span></tt></td>
|
<td><tt class="literal"><span class="pre">Distance</span></tt></td>
|
||||||
<td><tt class="docutils literal"><span class="pre">a</span> <span class="pre"><</span> <span class="pre">b</span> <span class="pre">?</span> <span class="pre">distance(a,b)</span>
|
<td><tt class="literal"><span class="pre">a</span> <span class="pre"><</span> <span class="pre">b</span> <span class="pre">?</span> <span class="pre">distance(a,b)</span>
|
||||||
<span class="pre">:</span> <span class="pre">-distance(b,a)</span></tt></td>
|
<span class="pre">:</span> <span class="pre">-distance(b,a)</span></tt></td>
|
||||||
<td>pre: there exists a
|
<td>pre: there exists a
|
||||||
value <tt class="docutils literal"><span class="pre">n</span></tt> of
|
value <tt class="literal"><span class="pre">n</span></tt> of
|
||||||
<tt class="docutils literal"><span class="pre">Distance</span></tt> such that
|
<tt class="literal"><span class="pre">Distance</span></tt> such that
|
||||||
<tt class="docutils literal"><span class="pre">a</span> <span class="pre">+</span> <span class="pre">n</span> <span class="pre">==</span> <span class="pre">b</span></tt>. <tt class="docutils literal"><span class="pre">b</span>
|
<tt class="literal"><span class="pre">a</span> <span class="pre">+</span> <span class="pre">n</span> <span class="pre">==</span> <span class="pre">b</span></tt>. <tt class="literal"><span class="pre">b</span>
|
||||||
<span class="pre">==</span> <span class="pre">a</span> <span class="pre">+</span> <span class="pre">(b</span> <span class="pre">-</span> <span class="pre">a)</span></tt>.</td>
|
<span class="pre">==</span> <span class="pre">a</span> <span class="pre">+</span> <span class="pre">(b</span> <span class="pre">-</span> <span class="pre">a)</span></tt>.</td>
|
||||||
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|
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|
||||||
<tr><td><tt class="docutils literal"><span class="pre">a[n]</span></tt></td>
|
<tr><td><tt class="literal"><span class="pre">a[n]</span></tt></td>
|
||||||
<td>convertible to T</td>
|
<td>convertible to T</td>
|
||||||
<td><tt class="docutils literal"><span class="pre">*(a</span> <span class="pre">+</span> <span class="pre">n)</span></tt></td>
|
<td><tt class="literal"><span class="pre">*(a</span> <span class="pre">+</span> <span class="pre">n)</span></tt></td>
|
||||||
<td>pre: a is a <em>Readable
|
<td>pre: a is a <em>Readable
|
||||||
Iterator</em></td>
|
Iterator</em></td>
|
||||||
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|
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|
||||||
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|
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|
||||||
<td>convertible to T</td>
|
<td>convertible to T</td>
|
||||||
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|
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|
||||||
<td>pre: a is a <em>Writable
|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
<td><tt class="docutils literal"><span class="pre">b</span> <span class="pre"><</span> <span class="pre">a</span></tt></td>
|
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|
||||||
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|
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|
||||||
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|
ordering relation</td>
|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
<td>convertible to <tt class="docutils literal"><span class="pre">bool</span></tt></td>
|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
<td>Convertible to
|
<td>Convertible to
|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
</table>
|
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|
||||||
</div>
|
</div>
|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="RandomAccessTraversal.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
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|
||||||
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|
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|
||||||
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|
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|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
Random Access Traversal Concept
|
Random Access Traversal Concept
|
||||||
...............................
|
...............................
|
||||||
|
|
||||||
|
|||||||
@ -3,337 +3,57 @@
|
|||||||
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|
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|
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|
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|
||||||
<div class="document" id="readable-iterator-concept">
|
|
||||||
<h1 class="title">Readable Iterator Concept</h1>
|
<h1 class="title">Readable Iterator Concept</h1>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
<div class="document" id="readable-iterator-concept">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Readable Iterator</em> concept
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
for value type <tt class="literal"><span class="pre">T</span></tt> if, in addition to <tt class="literal"><span class="pre">X</span></tt> being Assignable and
|
||||||
<p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Readable Iterator</em> concept
|
|
||||||
for value type <tt class="docutils literal"><span class="pre">T</span></tt> if, in addition to <tt class="docutils literal"><span class="pre">X</span></tt> being Assignable and
|
|
||||||
Copy Constructible, the following expressions are valid and respect
|
Copy Constructible, the following expressions are valid and respect
|
||||||
the stated semantics. <tt class="docutils literal"><span class="pre">U</span></tt> is the type of any specified member of
|
the stated semantics. <tt class="literal"><span class="pre">U</span></tt> is the type of any specified member of
|
||||||
type <tt class="docutils literal"><span class="pre">T</span></tt>.</p>
|
type <tt class="literal"><span class="pre">T</span></tt>.</p>
|
||||||
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|
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|
||||||
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|
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|
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|
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|
||||||
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|
<col width="20%" />
|
||||||
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|
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|
||||||
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|
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|
||||||
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|
<thead valign="bottom">
|
||||||
<tr><th class="head" colspan="3">Readable Iterator Requirements (in addition to Assignable and Copy Constructible)</th>
|
<tr><th colspan="3">Readable Iterator Requirements (in addition to Assignable and Copy Constructible)</th>
|
||||||
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|
</tr>
|
||||||
<tr><th class="head">Expression</th>
|
<tr><th>Expression</th>
|
||||||
<th class="head">Return Type</th>
|
<th>Return Type</th>
|
||||||
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|
<th>Note/Precondition</th>
|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
non-cv-qualified type</td>
|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
<dt>pre: <tt class="literal"><span class="pre">a</span></tt> is dereferenceable. If <tt class="literal"><span class="pre">a</span> <span class="pre">==</span> <span class="pre">b</span></tt> then <tt class="literal"><span class="pre">*a</span></tt></dt>
|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
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|
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|
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|
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|
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|
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|
||||||
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|
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|
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|
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|
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|
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|
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|
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|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="ReadableIterator.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
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|
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|
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|
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|
||||||
|
|||||||
@ -1,6 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
Readable Iterator Concept
|
Readable Iterator Concept
|
||||||
.........................
|
.........................
|
||||||
|
|||||||
@ -3,341 +3,61 @@
|
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<div class="document" id="single-pass-iterator-concept">
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<h1 class="title">Single Pass Iterator Concept</h1>
|
<h1 class="title">Single Pass Iterator Concept</h1>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
<div class="document" id="single-pass-iterator-concept">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Single Pass Iterator</em>
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Single Pass Iterator</em>
|
|
||||||
concept if the following expressions are valid and respect the stated
|
concept if the following expressions are valid and respect the stated
|
||||||
semantics.</p>
|
semantics.</p>
|
||||||
<table border="1" class="docutils">
|
<table border="1" class="table">
|
||||||
<colgroup>
|
<colgroup>
|
||||||
<col width="36%" />
|
<col width="36%" />
|
||||||
<col width="33%" />
|
<col width="33%" />
|
||||||
<col width="31%" />
|
<col width="31%" />
|
||||||
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|
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|
||||||
<thead valign="bottom">
|
<thead valign="bottom">
|
||||||
<tr><th class="head" colspan="3">Single Pass Iterator Requirements (in addition to Incrementable Iterator and Equality
|
<tr><th colspan="3">Single Pass Iterator Requirements (in addition to Incrementable Iterator and Equality
|
||||||
Comparable)</th>
|
Comparable)</th>
|
||||||
</tr>
|
</tr>
|
||||||
<tr><th class="head">Expression</th>
|
<tr><th>Expression</th>
|
||||||
<th class="head">Return Type</th>
|
<th>Return Type</th>
|
||||||
<th class="head">Assertion/Semantics /
|
<th>Assertion/Semantics /
|
||||||
Pre-/Post-condition</th>
|
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|
||||||
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|
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|
||||||
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|
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|
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|
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|
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|
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|
||||||
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|
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|
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|
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|
||||||
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|
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|
relation over its domain</td>
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|
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|
<a class="reference" href="SinglePassIterator.rst">View document source</a>.
|
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|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
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|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
Single Pass Iterator Concept
|
Single Pass Iterator Concept
|
||||||
............................
|
............................
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|
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|
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|
||||||
<div class="document" id="swappable-iterator-concept">
|
|
||||||
<h1 class="title">Swappable Iterator Concept</h1>
|
<h1 class="title">Swappable Iterator Concept</h1>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
<div class="document" id="swappable-iterator-concept">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Swappable Iterator</em> concept
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
if, in addition to <tt class="literal"><span class="pre">X</span></tt> being Copy Constructible, the following
|
||||||
<p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Swappable Iterator</em> concept
|
|
||||||
if, in addition to <tt class="docutils literal"><span class="pre">X</span></tt> being Copy Constructible, the following
|
|
||||||
expressions are valid and respect the stated semantics.</p>
|
expressions are valid and respect the stated semantics.</p>
|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
<thead valign="bottom">
|
<thead valign="bottom">
|
||||||
<tr><th class="head" colspan="3">Swappable Iterator Requirements (in addition to Copy Constructible)</th>
|
<tr><th colspan="3">Swappable Iterator Requirements (in addition to Copy Constructible)</th>
|
||||||
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|
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|
||||||
<tr><th class="head">Expression</th>
|
<tr><th>Expression</th>
|
||||||
<th class="head">Return Type</th>
|
<th>Return Type</th>
|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
||||||
<td><tt class="docutils literal"><span class="pre">void</span></tt></td>
|
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
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|
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|
||||||
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|
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|
||||||
<dl class="docutils">
|
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|
||||||
<dt>[<em>Note:</em> An iterator that is a model of the <em>Readable</em> and <em>Writable Iterator</em> concepts</dt>
|
<dt>[<em>Note:</em> An iterator that is a model of the <em>Readable</em> and <em>Writable Iterator</em> concepts</dt>
|
||||||
<dd>is also a model of <em>Swappable Iterator</em>. <em>--end note</em>]</dd>
|
<dd>is also a model of <em>Swappable Iterator</em>. <em>--end note</em>]</dd>
|
||||||
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|
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|
||||||
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|
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|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="SwappableIterator.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
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|
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|
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|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
Swappable Iterator Concept
|
Swappable Iterator Concept
|
||||||
..........................
|
..........................
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|
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<body>
|
||||||
<div class="document" id="writable-iterator-concept">
|
|
||||||
<h1 class="title">Writable Iterator Concept</h1>
|
<h1 class="title">Writable Iterator Concept</h1>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
<div class="document" id="writable-iterator-concept">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Writable Iterator</em> concept
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
if, in addition to <tt class="literal"><span class="pre">X</span></tt> being Copy Constructible, the following
|
||||||
<p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Writable Iterator</em> concept
|
|
||||||
if, in addition to <tt class="docutils literal"><span class="pre">X</span></tt> being Copy Constructible, the following
|
|
||||||
expressions are valid and respect the stated semantics. Writable
|
expressions are valid and respect the stated semantics. Writable
|
||||||
Iterators have an associated <em>set of value types</em>.</p>
|
Iterators have an associated <em>set of value types</em>.</p>
|
||||||
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||||||
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|
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|
||||||
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|
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|
||||||
<tr><th class="head" colspan="3">Writable Iterator Requirements (in addition to Copy Constructible)</th>
|
<tr><th colspan="3">Writable Iterator Requirements (in addition to Copy Constructible)</th>
|
||||||
</tr>
|
</tr>
|
||||||
<tr><th class="head">Expression</th>
|
<tr><th>Expression</th>
|
||||||
<th class="head">Return Type</th>
|
<th>Return Type</th>
|
||||||
<th class="head">Precondition</th>
|
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|
||||||
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|
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|
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|
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|
||||||
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|
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|
||||||
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|
<td>pre: The type of <tt class="literal"><span class="pre">o</span></tt>
|
||||||
is in the set of
|
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|
||||||
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|
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|
||||||
|
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|
||||||
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|
||||||
|
<a class="reference" href="WritableIterator.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
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|
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|
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|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
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||||||
|
|
||||||
Writable Iterator Concept
|
Writable Iterator Concept
|
||||||
.........................
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.........................
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<title>Counting Iterator</title>
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|
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|
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</head>
|
</head>
|
||||||
<body>
|
<body>
|
||||||
<div class="document" id="counting-iterator">
|
|
||||||
<h1 class="title">Counting Iterator</h1>
|
<h1 class="title">Counting Iterator</h1>
|
||||||
<table class="docinfo" frame="void" rules="none">
|
<table class="docinfo" frame="void" rules="none">
|
||||||
<col class="docinfo-name" />
|
<col class="docinfo-name" />
|
||||||
@ -314,46 +31,38 @@ Railway Operation and Construction</a></td></tr>
|
|||||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<!-- Distributed under the Boost -->
|
<div class="document" id="counting-iterator">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<table class="field-list" frame="void" rules="none">
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><p class="first">How would you fill up a vector with the numbers zero
|
<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><p class="first">How would you fill up a vector with the numbers zero
|
||||||
through one hundred using <tt class="docutils literal"><span class="pre">std::copy()</span></tt>? The only iterator
|
through one hundred using <tt class="literal"><span class="pre">std::copy()</span></tt>? The only iterator
|
||||||
operation missing from builtin integer types is an
|
operation missing from builtin integer types is an
|
||||||
<tt class="docutils literal"><span class="pre">operator*()</span></tt> that returns the current value of the integer.
|
<tt class="literal"><span class="pre">operator*()</span></tt> that returns the current value of the integer.
|
||||||
The counting iterator adaptor adds this crucial piece of
|
The counting iterator adaptor adds this crucial piece of
|
||||||
functionality to whatever type it wraps. One can use the
|
functionality to whatever type it wraps. One can use the
|
||||||
counting iterator adaptor not only with integer types, but with
|
counting iterator adaptor not only with integer types, but with
|
||||||
any incrementable type.</p>
|
any incrementable type.</p>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
<p class="last"><tt class="literal"><span class="pre">counting_iterator</span></tt> adapts an object by adding an <tt class="literal"><span class="pre">operator*</span></tt> that
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<p class="last"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> adapts an object by adding an <tt class="docutils literal"><span class="pre">operator*</span></tt> that
|
|
||||||
returns the current value of the object. All other iterator operations
|
returns the current value of the object. All other iterator operations
|
||||||
are forwarded to the adapted object.</p>
|
are forwarded to the adapted object.</p>
|
||||||
</td>
|
</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<div class="contents topic">
|
<div class="contents topic" id="table-of-contents">
|
||||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
<li><a class="reference" href="#counting-iterator-synopsis" id="id2" name="id2"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> synopsis</a></li>
|
<li><a class="reference" href="#counting-iterator-synopsis" id="id2" name="id2"><tt class="literal"><span class="pre">counting_iterator</span></tt> synopsis</a></li>
|
||||||
<li><a class="reference" href="#counting-iterator-requirements" id="id3" name="id3"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> requirements</a></li>
|
<li><a class="reference" href="#counting-iterator-requirements" id="id3" name="id3"><tt class="literal"><span class="pre">counting_iterator</span></tt> requirements</a></li>
|
||||||
<li><a class="reference" href="#counting-iterator-models" id="id4" name="id4"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> models</a></li>
|
<li><a class="reference" href="#counting-iterator-models" id="id4" name="id4"><tt class="literal"><span class="pre">counting_iterator</span></tt> models</a></li>
|
||||||
<li><a class="reference" href="#counting-iterator-operations" id="id5" name="id5"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> operations</a></li>
|
<li><a class="reference" href="#counting-iterator-operations" id="id5" name="id5"><tt class="literal"><span class="pre">counting_iterator</span></tt> operations</a></li>
|
||||||
<li><a class="reference" href="#example" id="id6" name="id6">Example</a></li>
|
<li><a class="reference" href="#example" id="id6" name="id6">Example</a></li>
|
||||||
</ul>
|
</ul>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="counting-iterator-synopsis">
|
||||||
<h1><a class="toc-backref" href="#id2" id="counting-iterator-synopsis" name="counting-iterator-synopsis"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> synopsis</a></h1>
|
<h1><a class="toc-backref" href="#id2" name="counting-iterator-synopsis"><tt class="literal"><span class="pre">counting_iterator</span></tt> synopsis</a></h1>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
template <
|
template <
|
||||||
class Incrementable
|
class Incrementable
|
||||||
@ -380,10 +89,10 @@ private:
|
|||||||
Incrementable m_inc; // exposition
|
Incrementable m_inc; // exposition
|
||||||
};
|
};
|
||||||
</pre>
|
</pre>
|
||||||
<p>If the <tt class="docutils literal"><span class="pre">Difference</span></tt> argument is <tt class="docutils literal"><span class="pre">use_default</span></tt> then
|
<p>If the <tt class="literal"><span class="pre">Difference</span></tt> argument is <tt class="literal"><span class="pre">use_default</span></tt> then
|
||||||
<tt class="docutils literal"><span class="pre">difference_type</span></tt> is an unspecified signed integral
|
<tt class="literal"><span class="pre">difference_type</span></tt> is an unspecified signed integral
|
||||||
type. Otherwise <tt class="docutils literal"><span class="pre">difference_type</span></tt> is <tt class="docutils literal"><span class="pre">Difference</span></tt>.</p>
|
type. Otherwise <tt class="literal"><span class="pre">difference_type</span></tt> is <tt class="literal"><span class="pre">Difference</span></tt>.</p>
|
||||||
<p><tt class="docutils literal"><span class="pre">iterator_category</span></tt> is determined according to the following
|
<p><tt class="literal"><span class="pre">iterator_category</span></tt> is determined according to the following
|
||||||
algorithm:</p>
|
algorithm:</p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
if (CategoryOrTraversal is not use_default)
|
if (CategoryOrTraversal is not use_default)
|
||||||
@ -396,31 +105,31 @@ else
|
|||||||
iterator_traversal<Incrementable>::type,
|
iterator_traversal<Incrementable>::type,
|
||||||
Incrementable, const Incrementable&)
|
Incrementable, const Incrementable&)
|
||||||
</pre>
|
</pre>
|
||||||
<dl class="docutils">
|
<dl>
|
||||||
<dt>[<em>Note:</em> implementers are encouraged to provide an implementation of</dt>
|
<dt>[<em>Note:</em> implementers are encouraged to provide an implementation of</dt>
|
||||||
<dd><tt class="docutils literal"><span class="pre">operator-</span></tt> and a <tt class="docutils literal"><span class="pre">difference_type</span></tt> that avoids overflows in
|
<dd><tt class="literal"><span class="pre">operator-</span></tt> and a <tt class="literal"><span class="pre">difference_type</span></tt> that avoids overflows in
|
||||||
the cases where <tt class="docutils literal"><span class="pre">std::numeric_limits<Incrementable>::is_specialized</span></tt>
|
the cases where <tt class="literal"><span class="pre">std::numeric_limits<Incrementable>::is_specialized</span></tt>
|
||||||
is true.]</dd>
|
is true.]</dd>
|
||||||
</dl>
|
</dl>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="counting-iterator-requirements">
|
||||||
<h1><a class="toc-backref" href="#id3" id="counting-iterator-requirements" name="counting-iterator-requirements"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> requirements</a></h1>
|
<h1><a class="toc-backref" href="#id3" name="counting-iterator-requirements"><tt class="literal"><span class="pre">counting_iterator</span></tt> requirements</a></h1>
|
||||||
<p>The <tt class="docutils literal"><span class="pre">Incrementable</span></tt> argument shall be Copy Constructible and Assignable.</p>
|
<p>The <tt class="literal"><span class="pre">Incrementable</span></tt> argument shall be Copy Constructible and Assignable.</p>
|
||||||
<p>If <tt class="docutils literal"><span class="pre">iterator_category</span></tt> is convertible to <tt class="docutils literal"><span class="pre">forward_iterator_tag</span></tt>
|
<p>If <tt class="literal"><span class="pre">iterator_category</span></tt> is convertible to <tt class="literal"><span class="pre">forward_iterator_tag</span></tt>
|
||||||
or <tt class="docutils literal"><span class="pre">forward_traversal_tag</span></tt>, the following must be well-formed:</p>
|
or <tt class="literal"><span class="pre">forward_traversal_tag</span></tt>, the following must be well-formed:</p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
Incrementable i, j;
|
Incrementable i, j;
|
||||||
++i; // pre-increment
|
++i; // pre-increment
|
||||||
i == j; // operator equal
|
i == j; // operator equal
|
||||||
</pre>
|
</pre>
|
||||||
<p>If <tt class="docutils literal"><span class="pre">iterator_category</span></tt> is convertible to
|
<p>If <tt class="literal"><span class="pre">iterator_category</span></tt> is convertible to
|
||||||
<tt class="docutils literal"><span class="pre">bidirectional_iterator_tag</span></tt> or <tt class="docutils literal"><span class="pre">bidirectional_traversal_tag</span></tt>,
|
<tt class="literal"><span class="pre">bidirectional_iterator_tag</span></tt> or <tt class="literal"><span class="pre">bidirectional_traversal_tag</span></tt>,
|
||||||
the following expression must also be well-formed:</p>
|
the following expression must also be well-formed:</p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
--i
|
--i
|
||||||
</pre>
|
</pre>
|
||||||
<p>If <tt class="docutils literal"><span class="pre">iterator_category</span></tt> is convertible to
|
<p>If <tt class="literal"><span class="pre">iterator_category</span></tt> is convertible to
|
||||||
<tt class="docutils literal"><span class="pre">random_access_iterator_tag</span></tt> or <tt class="docutils literal"><span class="pre">random_access_traversal_tag</span></tt>,
|
<tt class="literal"><span class="pre">random_access_iterator_tag</span></tt> or <tt class="literal"><span class="pre">random_access_traversal_tag</span></tt>,
|
||||||
the following must must also be valid:</p>
|
the following must must also be valid:</p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
counting_iterator::difference_type n;
|
counting_iterator::difference_type n;
|
||||||
@ -429,121 +138,115 @@ n = i - j;
|
|||||||
i < j;
|
i < j;
|
||||||
</pre>
|
</pre>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="counting-iterator-models">
|
||||||
<h1><a class="toc-backref" href="#id4" id="counting-iterator-models" name="counting-iterator-models"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> models</a></h1>
|
<h1><a class="toc-backref" href="#id4" name="counting-iterator-models"><tt class="literal"><span class="pre">counting_iterator</span></tt> models</a></h1>
|
||||||
<p>Specializations of <tt class="docutils literal"><span class="pre">counting_iterator</span></tt> model Readable Lvalue
|
<p>Specializations of <tt class="literal"><span class="pre">counting_iterator</span></tt> model Readable Lvalue
|
||||||
Iterator. In addition, they model the concepts corresponding to the
|
Iterator. In addition, they model the concepts corresponding to the
|
||||||
iterator tags to which their <tt class="docutils literal"><span class="pre">iterator_category</span></tt> is convertible.
|
iterator tags to which their <tt class="literal"><span class="pre">iterator_category</span></tt> is convertible.
|
||||||
Also, if <tt class="docutils literal"><span class="pre">CategoryOrTraversal</span></tt> is not <tt class="docutils literal"><span class="pre">use_default</span></tt> then
|
Also, if <tt class="literal"><span class="pre">CategoryOrTraversal</span></tt> is not <tt class="literal"><span class="pre">use_default</span></tt> then
|
||||||
<tt class="docutils literal"><span class="pre">counting_iterator</span></tt> models the concept corresponding to the iterator
|
<tt class="literal"><span class="pre">counting_iterator</span></tt> models the concept corresponding to the iterator
|
||||||
tag <tt class="docutils literal"><span class="pre">CategoryOrTraversal</span></tt>. Otherwise, if
|
tag <tt class="literal"><span class="pre">CategoryOrTraversal</span></tt>. Otherwise, if
|
||||||
<tt class="docutils literal"><span class="pre">numeric_limits<Incrementable>::is_specialized</span></tt>, then
|
<tt class="literal"><span class="pre">numeric_limits<Incrementable>::is_specialized</span></tt>, then
|
||||||
<tt class="docutils literal"><span class="pre">counting_iterator</span></tt> models Random Access Traversal Iterator.
|
<tt class="literal"><span class="pre">counting_iterator</span></tt> models Random Access Traversal Iterator.
|
||||||
Otherwise, <tt class="docutils literal"><span class="pre">counting_iterator</span></tt> models the same iterator traversal
|
Otherwise, <tt class="literal"><span class="pre">counting_iterator</span></tt> models the same iterator traversal
|
||||||
concepts modeled by <tt class="docutils literal"><span class="pre">Incrementable</span></tt>.</p>
|
concepts modeled by <tt class="literal"><span class="pre">Incrementable</span></tt>.</p>
|
||||||
<p><tt class="docutils literal"><span class="pre">counting_iterator<X,C1,D1></span></tt> is interoperable with
|
<p><tt class="literal"><span class="pre">counting_iterator<X,C1,D1></span></tt> is interoperable with
|
||||||
<tt class="docutils literal"><span class="pre">counting_iterator<Y,C2,D2></span></tt> if and only if <tt class="docutils literal"><span class="pre">X</span></tt> is
|
<tt class="literal"><span class="pre">counting_iterator<Y,C2,D2></span></tt> if and only if <tt class="literal"><span class="pre">X</span></tt> is
|
||||||
interoperable with <tt class="docutils literal"><span class="pre">Y</span></tt>.</p>
|
interoperable with <tt class="literal"><span class="pre">Y</span></tt>.</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="counting-iterator-operations">
|
||||||
<h1><a class="toc-backref" href="#id5" id="counting-iterator-operations" name="counting-iterator-operations"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> operations</a></h1>
|
<h1><a class="toc-backref" href="#id5" name="counting-iterator-operations"><tt class="literal"><span class="pre">counting_iterator</span></tt> operations</a></h1>
|
||||||
<p>In addition to the operations required by the concepts modeled by
|
<p>In addition to the operations required by the concepts modeled by
|
||||||
<tt class="docutils literal"><span class="pre">counting_iterator</span></tt>, <tt class="docutils literal"><span class="pre">counting_iterator</span></tt> provides the following
|
<tt class="literal"><span class="pre">counting_iterator</span></tt>, <tt class="literal"><span class="pre">counting_iterator</span></tt> provides the following
|
||||||
operations.</p>
|
operations.</p>
|
||||||
<p><tt class="docutils literal"><span class="pre">counting_iterator();</span></tt></p>
|
<p><tt class="literal"><span class="pre">counting_iterator();</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="docutils literal"><span class="pre">Incrementable</span></tt> is Default Constructible.</td>
|
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="literal"><span class="pre">Incrementable</span></tt> is Default Constructible.</td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Default construct the member <tt class="docutils literal"><span class="pre">m_inc</span></tt>.</td>
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Default construct the member <tt class="literal"><span class="pre">m_inc</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">counting_iterator(counting_iterator</span> <span class="pre">const&</span> <span class="pre">rhs);</span></tt></p>
|
<p><tt class="literal"><span class="pre">counting_iterator(counting_iterator</span> <span class="pre">const&</span> <span class="pre">rhs);</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Construct member <tt class="docutils literal"><span class="pre">m_inc</span></tt> from <tt class="docutils literal"><span class="pre">rhs.m_inc</span></tt>.</td>
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Construct member <tt class="literal"><span class="pre">m_inc</span></tt> from <tt class="literal"><span class="pre">rhs.m_inc</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">explicit</span> <span class="pre">counting_iterator(Incrementable</span> <span class="pre">x);</span></tt></p>
|
<p><tt class="literal"><span class="pre">explicit</span> <span class="pre">counting_iterator(Incrementable</span> <span class="pre">x);</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Construct member <tt class="docutils literal"><span class="pre">m_inc</span></tt> from <tt class="docutils literal"><span class="pre">x</span></tt>.</td>
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Construct member <tt class="literal"><span class="pre">m_inc</span></tt> from <tt class="literal"><span class="pre">x</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">reference</span> <span class="pre">operator*()</span> <span class="pre">const;</span></tt></p>
|
<p><tt class="literal"><span class="pre">reference</span> <span class="pre">operator*()</span> <span class="pre">const;</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">m_inc</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_inc</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">counting_iterator&</span> <span class="pre">operator++();</span></tt></p>
|
<p><tt class="literal"><span class="pre">counting_iterator&</span> <span class="pre">operator++();</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="docutils literal"><span class="pre">++m_inc</span></tt></td>
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="literal"><span class="pre">++m_inc</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">*this</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*this</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">counting_iterator&</span> <span class="pre">operator--();</span></tt></p>
|
<p><tt class="literal"><span class="pre">counting_iterator&</span> <span class="pre">operator--();</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="docutils literal"><span class="pre">--m_inc</span></tt></td>
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="literal"><span class="pre">--m_inc</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">*this</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*this</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">Incrementable</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
<p><tt class="literal"><span class="pre">Incrementable</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">m_inc</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_inc</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
template <class Incrementable>
|
template <class Incrementable>
|
||||||
counting_iterator<Incrementable> make_counting_iterator(Incrementable x);
|
counting_iterator<Incrementable> make_counting_iterator(Incrementable x);
|
||||||
</pre>
|
</pre>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">An instance of <tt class="docutils literal"><span class="pre">counting_iterator<Incrementable></span></tt>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">An instance of <tt class="literal"><span class="pre">counting_iterator<Incrementable></span></tt>
|
||||||
with <tt class="docutils literal"><span class="pre">current</span></tt> constructed from <tt class="docutils literal"><span class="pre">x</span></tt>.</td>
|
with <tt class="literal"><span class="pre">current</span></tt> constructed from <tt class="literal"><span class="pre">x</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="example">
|
||||||
<h1><a class="toc-backref" href="#id6" id="example" name="example">Example</a></h1>
|
<h1><a class="toc-backref" href="#id6" name="example">Example</a></h1>
|
||||||
<p>This example fills an array with numbers and a second array with
|
<p>This example fills an array with numbers and a second array with
|
||||||
pointers into the first array, using <tt class="docutils literal"><span class="pre">counting_iterator</span></tt> for both
|
pointers into the first array, using <tt class="literal"><span class="pre">counting_iterator</span></tt> for both
|
||||||
tasks. Finally <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> is used to print out the numbers
|
tasks. Finally <tt class="literal"><span class="pre">indirect_iterator</span></tt> is used to print out the numbers
|
||||||
into the first array via indirection through the second array.</p>
|
into the first array via indirection through the second array.</p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
int N = 7;
|
int N = 7;
|
||||||
@ -573,5 +276,10 @@ indirectly printing out the numbers from 0 to 7
|
|||||||
<p>The source code for this example can be found <a class="reference" href="../example/counting_iterator_example.cpp">here</a>.</p>
|
<p>The source code for this example can be found <a class="reference" href="../example/counting_iterator_example.cpp">here</a>.</p>
|
||||||
</div>
|
</div>
|
||||||
</div>
|
</div>
|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="counting_iterator.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
</div>
|
||||||
</body>
|
</body>
|
||||||
</html>
|
</html>
|
||||||
|
|||||||
Binary file not shown.
@ -1,7 +1,3 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
+++++++++++++++++++
|
+++++++++++++++++++
|
||||||
Counting Iterator
|
Counting Iterator
|
||||||
+++++++++++++++++++
|
+++++++++++++++++++
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
``counting_iterator`` adapts an object by adding an ``operator*`` that
|
``counting_iterator`` adapts an object by adding an ``operator*`` that
|
||||||
returns the current value of the object. All other iterator operations
|
returns the current value of the object. All other iterator operations
|
||||||
are forwarded to the adapted object.
|
are forwarded to the adapted object.
|
||||||
|
|||||||
@ -1,6 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
Example
|
Example
|
||||||
.......
|
.......
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
::
|
::
|
||||||
|
|
||||||
template <
|
template <
|
||||||
|
|||||||
@ -5,8 +5,6 @@
|
|||||||
:version: $Revision$
|
:version: $Revision$
|
||||||
:copyright: This stylesheet has been placed in the public domain.
|
:copyright: This stylesheet has been placed in the public domain.
|
||||||
|
|
||||||
boostinspect:nolicense
|
|
||||||
|
|
||||||
Default cascading style sheet for the HTML output of Docutils.
|
Default cascading style sheet for the HTML output of Docutils.
|
||||||
*/
|
*/
|
||||||
|
|
||||||
|
|||||||
228
doc/facade-and-adaptor.diff
Executable file
228
doc/facade-and-adaptor.diff
Executable file
@ -0,0 +1,228 @@
|
|||||||
|
Index: facade-and-adaptor.rst
|
||||||
|
===================================================================
|
||||||
|
RCS file: /cvsroot/boost/boost/libs/iterator/doc/facade-and-adaptor.rst,v
|
||||||
|
retrieving revision 1.9
|
||||||
|
retrieving revision 1.14
|
||||||
|
diff -b -d -u -r1.9 -r1.14
|
||||||
|
--- facade-and-adaptor.rst 22 Sep 2003 19:55:00 -0000 1.9
|
||||||
|
+++ facade-and-adaptor.rst 18 Jan 2004 15:51:06 -0000 1.14
|
||||||
|
@@ -3,17 +3,25 @@ None
|
||||||
|
+++++++++++++++++++++++++++++
|
||||||
|
|
||||||
|
:Author: David Abrahams, Jeremy Siek, Thomas Witt
|
||||||
|
-:Contact: dave@boost-consulting.com, jsiek@osl.iu.edu, witt@acm.org
|
||||||
|
+:Contact: dave@boost-consulting.com, jsiek@osl.iu.edu, witt@styleadvisor.com
|
||||||
|
:organization: `Boost Consulting`_, Indiana University `Open Systems
|
||||||
|
- Lab`_, University of Hanover `Institute for Transport
|
||||||
|
- Railway Operation and Construction`_
|
||||||
|
-:date: $Date: 2004/01/18 19:56:39 $
|
||||||
|
-:Number: N1530=03-0113
|
||||||
|
+ Lab`_, `Zephyr Associates, Inc.`_
|
||||||
|
+:date: $Date: 2004/01/18 19:56:39 $
|
||||||
|
+
|
||||||
|
+:Number: This is a revised version of N1530_\ =03-0113, which was
|
||||||
|
+ accepted for Technical Report 1 by the C++ standard
|
||||||
|
+ committee's library working group.
|
||||||
|
+
|
||||||
|
+.. Version 1.9 of this ReStructuredText document corresponds to
|
||||||
|
+ n1530_, the paper accepted by the LWG.
|
||||||
|
+
|
||||||
|
+.. _n1530: http://anubis.dkuug.dk/jtc1/sc22/wg21/docs/papers/2003/n1530.html
|
||||||
|
+
|
||||||
|
:copyright: Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. All rights reserved
|
||||||
|
|
||||||
|
.. _`Boost Consulting`: http://www.boost-consulting.com
|
||||||
|
.. _`Open Systems Lab`: http://www.osl.iu.edu
|
||||||
|
-.. _`Institute for Transport Railway Operation and Construction`: http://www.ive.uni-hannover.de
|
||||||
|
+.. _`Zephyr Associates, Inc.`: http://www.styleadvisor.com
|
||||||
|
|
||||||
|
:abstract: We propose a set of class templates that help programmers
|
||||||
|
build standard-conforming iterators, both from scratch and
|
||||||
|
@@ -124,15 +132,15 @@ None
|
||||||
|
=================
|
||||||
|
|
||||||
|
This proposal is formulated in terms of the new ``iterator concepts``
|
||||||
|
-as proposed in `n1477`_, since user-defined and especially adapted
|
||||||
|
+as proposed in n1550_, since user-defined and especially adapted
|
||||||
|
iterators suffer from the well known categorization problems that are
|
||||||
|
inherent to the current iterator categories.
|
||||||
|
|
||||||
|
-.. _`n1477`: http://anubis.dkuug.dk/JTC1/SC22/WG21/docs/papers/2003/n1477.html
|
||||||
|
+.. _n1550: http://anubis.dkuug.dk/JTC1/SC22/WG21/docs/papers/2003/n1550.html
|
||||||
|
|
||||||
|
-This proposal does not strictly depend on proposal `n1477`_, as there
|
||||||
|
+This proposal does not strictly depend on proposal n1550_, as there
|
||||||
|
is a direct mapping between new and old categories. This proposal
|
||||||
|
-could be reformulated using this mapping if `n1477`_ was not accepted.
|
||||||
|
+could be reformulated using this mapping if n1550_ was not accepted.
|
||||||
|
|
||||||
|
Interoperability
|
||||||
|
================
|
||||||
|
@@ -141,24 +149,24 @@ None
|
||||||
|
current standard. There are currently two defect reports that are
|
||||||
|
concerned with interoperability issues.
|
||||||
|
|
||||||
|
-Issue `179`_ concerns the fact that mutable container iterator types
|
||||||
|
+Issue 179_ concerns the fact that mutable container iterator types
|
||||||
|
are only required to be convertible to the corresponding constant
|
||||||
|
iterator types, but objects of these types are not required to
|
||||||
|
interoperate in comparison or subtraction expressions. This situation
|
||||||
|
is tedious in practice and out of line with the way built in types
|
||||||
|
work. This proposal implements the proposed resolution to issue
|
||||||
|
-`179`_, as most standard library implementations do nowadays. In other
|
||||||
|
+179_, as most standard library implementations do nowadays. In other
|
||||||
|
words, if an iterator type A has an implicit or user defined
|
||||||
|
conversion to an iterator type B, the iterator types are interoperable
|
||||||
|
and the usual set of operators are available.
|
||||||
|
|
||||||
|
-Issue `280`_ concerns the current lack of interoperability between
|
||||||
|
+Issue 280_ concerns the current lack of interoperability between
|
||||||
|
reverse iterator types. The proposed new reverse_iterator template
|
||||||
|
fixes the issues raised in 280. It provides the desired
|
||||||
|
interoperability without introducing unwanted overloads.
|
||||||
|
|
||||||
|
-.. _`179`: http://anubis.dkuug.dk/jtc1/sc22/wg21/docs/lwg-defects.html#179
|
||||||
|
-.. _`280`: http://anubis.dkuug.dk/jtc1/sc22/wg21/docs/lwg-active.html#280
|
||||||
|
+.. _179: http://anubis.dkuug.dk/jtc1/sc22/wg21/docs/lwg-defects.html#179
|
||||||
|
+.. _280: http://anubis.dkuug.dk/jtc1/sc22/wg21/docs/lwg-active.html#280
|
||||||
|
|
||||||
|
|
||||||
|
Iterator Facade
|
||||||
|
@@ -195,7 +203,7 @@ None
|
||||||
|
* ``filter_iterator``, which provides a view of an iterator range in
|
||||||
|
which some elements of the underlying range are skipped.
|
||||||
|
|
||||||
|
-.. _counting_iterator:
|
||||||
|
+.. _counting:
|
||||||
|
|
||||||
|
* ``counting_iterator``, which adapts any incrementable type
|
||||||
|
(e.g. integers, iterators) so that incrementing/decrementing the
|
||||||
|
@@ -226,15 +234,13 @@ Issue 9.1 et al
|
||||||
|
::
|
||||||
|
|
||||||
|
struct use_default;
|
||||||
|
- const unsigned use_default_access = -1;
|
||||||
|
|
||||||
|
struct iterator_core_access { /* implementation detail */ };
|
||||||
|
|
||||||
|
template <
|
||||||
|
class Derived
|
||||||
|
, class Value
|
||||||
|
- , unsigned AccessCategory
|
||||||
|
- , class TraversalCategory
|
||||||
|
+ , class CategoryOrTraversal
|
||||||
|
, class Reference = Value&
|
||||||
|
, class Difference = ptrdiff_t
|
||||||
|
>
|
||||||
|
@@ -244,8 +250,7 @@ Issue 9.1 et al.
|
||||||
|
class Derived
|
||||||
|
, class Base
|
||||||
|
, class Value = use_default
|
||||||
|
- , unsigned Access = use_default_access
|
||||||
|
- , class Traversal = use_default
|
||||||
|
+ , class CategoryOrTraversal = use_default
|
||||||
|
, class Reference = use_default
|
||||||
|
, class Difference = use_default
|
||||||
|
>
|
||||||
|
@@ -254,10 +259,9 @@ Issue 9.1 et al.
|
||||||
|
template <
|
||||||
|
class Iterator
|
||||||
|
, class Value = use_default
|
||||||
|
- , unsigned Access = use_default_access
|
||||||
|
- , class Traversal = use_default
|
||||||
|
+ , class CategoryOrTraversal = use_default
|
||||||
|
, class Reference = use_default
|
||||||
|
, class Difference = use_default
|
||||||
|
>
|
||||||
|
class indirect_iterator;
|
||||||
|
|
||||||
|
Issue 9.44y
|
||||||
|
|
||||||
|
+ template <class Dereferenceable>
|
||||||
|
+ struct pointee;
|
||||||
|
+
|
||||||
|
+ template <class Dereferenceable>
|
||||||
|
+ struct indirect_reference;
|
||||||
|
+
|
||||||
|
template <class Iterator>
|
||||||
|
class reverse_iterator;
|
||||||
|
|
||||||
|
@@ -277,8 +287,7 @@ Issue 9.1 et al.
|
||||||
|
|
||||||
|
template <
|
||||||
|
class Incrementable
|
||||||
|
- , unsigned Access = use_default_access
|
||||||
|
- , class Traversal = use_default
|
||||||
|
+ , class CategoryOrTraversal = use_default
|
||||||
|
, class Difference = use_default
|
||||||
|
>
|
||||||
|
class counting_iterator
|
||||||
|
@@ -312,17 +321,35 @@ Issue 9.8
|
||||||
|
Specialized adaptors [lib.iterator.special.adaptors]
|
||||||
|
====================================================
|
||||||
|
|
||||||
|
-.. The requirements for all of these need to be written *much* more
|
||||||
|
- formally -DWA
|
||||||
|
-
|
||||||
|
|
||||||
|
-[*Note:* The ``enable_if_convertible<X,Y>::type`` expression used in
|
||||||
|
+The ``enable_if_convertible<X,Y>::type`` expression used in
|
||||||
|
this section is for exposition purposes. The converting constructors
|
||||||
|
for specialized adaptors should be only be in an overload set provided
|
||||||
|
that an object of type ``X`` is implicitly convertible to an object of
|
||||||
|
-type ``Y``. The ``enable_if_convertible`` approach uses SFINAE to
|
||||||
|
+type ``Y``.
|
||||||
|
+The signatures involving ``enable_if_convertible`` should behave
|
||||||
|
+*as-if* ``enable_if_convertible`` were defined to be::
|
||||||
|
+
|
||||||
|
+ template <bool> enable_if_convertible_impl
|
||||||
|
+ {};
|
||||||
|
+
|
||||||
|
+ template <> enable_if_convertible_impl<true>
|
||||||
|
+ { struct type; };
|
||||||
|
+
|
||||||
|
+ template<typename From, typename To>
|
||||||
|
+ struct enable_if_convertible
|
||||||
|
+ : enable_if_convertible_impl<is_convertible<From,To>::value>
|
||||||
|
+ {};
|
||||||
|
+
|
||||||
|
+If an expression other than the default argument is used to supply
|
||||||
|
+the value of a function parameter whose type is written in terms
|
||||||
|
+of ``enable_if_convertible``, the program is ill-formed, no
|
||||||
|
+diagnostic required.
|
||||||
|
+
|
||||||
|
+[*Note:* The ``enable_if_convertible`` approach uses SFINAE to
|
||||||
|
take the constructor out of the overload set when the types are not
|
||||||
|
-implicitly convertible.]
|
||||||
|
+implicitly convertible.
|
||||||
|
+]
|
||||||
|
|
||||||
|
|
||||||
|
Indirect iterator
|
||||||
|
@@ -330,6 +357,16 @@ Issue 9.44y
|
||||||
|
|
||||||
|
.. include:: indirect_iterator_abstract.rst
|
||||||
|
|
||||||
|
+Class template ``pointee``
|
||||||
|
+....................................
|
||||||
|
+
|
||||||
|
+.. include:: pointee_ref.rst
|
||||||
|
+
|
||||||
|
+Class template ``indirect_reference``
|
||||||
|
+.....................................
|
||||||
|
+
|
||||||
|
+.. include:: indirect_reference_ref.rst
|
||||||
|
+
|
||||||
|
Class template ``indirect_iterator``
|
||||||
|
....................................
|
||||||
|
|
||||||
|
@@ -393,8 +430,7 @@
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
-..
|
||||||
|
- LocalWords: Abrahams Siek Witt istream ostream iter MTL strided interoperate
|
||||||
|
+.. LocalWords: Abrahams Siek Witt istream ostream iter MTL strided interoperate
|
||||||
|
LocalWords: CRTP metafunctions inlining lvalue JGS incrementable BGL LEDA cv
|
||||||
|
LocalWords: GraphBase struct ptrdiff UnaryFunction const int typename bool pp
|
||||||
|
LocalWords: lhs rhs SFINAE markup iff tmp OtherDerived OtherIterator DWA foo
|
||||||
File diff suppressed because it is too large
Load Diff
Binary file not shown.
@ -1,7 +1,3 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
+++++++++++++++++++++++++++++
|
+++++++++++++++++++++++++++++
|
||||||
Iterator Facade and Adaptor
|
Iterator Facade and Adaptor
|
||||||
+++++++++++++++++++++++++++++
|
+++++++++++++++++++++++++++++
|
||||||
|
|||||||
@ -3,298 +3,15 @@
|
|||||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||||||
<head>
|
<head>
|
||||||
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</style>
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||||||
</head>
|
</head>
|
||||||
<body>
|
<body>
|
||||||
<div class="document" id="filter-iterator">
|
|
||||||
<h1 class="title">Filter Iterator</h1>
|
<h1 class="title">Filter Iterator</h1>
|
||||||
<table class="docinfo" frame="void" rules="none">
|
<table class="docinfo" frame="void" rules="none">
|
||||||
<col class="docinfo-name" />
|
<col class="docinfo-name" />
|
||||||
@ -314,21 +31,16 @@ Railway Operation and Construction</a></td></tr>
|
|||||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<!-- Distributed under the Boost -->
|
<div class="document" id="filter-iterator">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<table class="field-list" frame="void" rules="none">
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
<tr class="field"><th class="field-name">abstract:</th><td class="field-body">The filter iterator adaptor creates a view of an iterator range in
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
The filter iterator adaptor creates a view of an iterator range in
|
|
||||||
which some elements of the range are skipped. A predicate function
|
which some elements of the range are skipped. A predicate function
|
||||||
object controls which elements are skipped. When the predicate is
|
object controls which elements are skipped. When the predicate is
|
||||||
applied to an element, if it returns <tt class="docutils literal"><span class="pre">true</span></tt> then the element is
|
applied to an element, if it returns <tt class="literal"><span class="pre">true</span></tt> then the element is
|
||||||
retained and if it returns <tt class="docutils literal"><span class="pre">false</span></tt> then the element is skipped
|
retained and if it returns <tt class="literal"><span class="pre">false</span></tt> then the element is skipped
|
||||||
over. When skipping over elements, it is necessary for the filter
|
over. When skipping over elements, it is necessary for the filter
|
||||||
adaptor to know when to stop so as to avoid going past the end of the
|
adaptor to know when to stop so as to avoid going past the end of the
|
||||||
underlying range. A filter iterator is therefore constructed with pair
|
underlying range. A filter iterator is therefore constructed with pair
|
||||||
@ -337,18 +49,18 @@ sequence to be traversed.</td>
|
|||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<div class="contents topic">
|
<div class="contents topic" id="table-of-contents">
|
||||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
<li><a class="reference" href="#filter-iterator-synopsis" id="id2" name="id2"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt> synopsis</a></li>
|
<li><a class="reference" href="#filter-iterator-synopsis" id="id2" name="id2"><tt class="literal"><span class="pre">filter_iterator</span></tt> synopsis</a></li>
|
||||||
<li><a class="reference" href="#filter-iterator-requirements" id="id3" name="id3"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt> requirements</a></li>
|
<li><a class="reference" href="#filter-iterator-requirements" id="id3" name="id3"><tt class="literal"><span class="pre">filter_iterator</span></tt> requirements</a></li>
|
||||||
<li><a class="reference" href="#filter-iterator-models" id="id4" name="id4"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt> models</a></li>
|
<li><a class="reference" href="#filter-iterator-models" id="id4" name="id4"><tt class="literal"><span class="pre">filter_iterator</span></tt> models</a></li>
|
||||||
<li><a class="reference" href="#filter-iterator-operations" id="id5" name="id5"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt> operations</a></li>
|
<li><a class="reference" href="#filter-iterator-operations" id="id5" name="id5"><tt class="literal"><span class="pre">filter_iterator</span></tt> operations</a></li>
|
||||||
<li><a class="reference" href="#example" id="id6" name="id6">Example</a></li>
|
<li><a class="reference" href="#example" id="id6" name="id6">Example</a></li>
|
||||||
</ul>
|
</ul>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="filter-iterator-synopsis">
|
||||||
<h1><a class="toc-backref" href="#id2" id="filter-iterator-synopsis" name="filter-iterator-synopsis"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt> synopsis</a></h1>
|
<h1><a class="toc-backref" href="#id2" name="filter-iterator-synopsis"><tt class="literal"><span class="pre">filter_iterator</span></tt> synopsis</a></h1>
|
||||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt -->
|
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt -->
|
||||||
<!-- 2004. Use, modification and distribution is subject to the Boost -->
|
<!-- 2004. Use, modification and distribution is subject to the Boost -->
|
||||||
<!-- Software License, Version 1.0. (See accompanying file -->
|
<!-- Software License, Version 1.0. (See accompanying file -->
|
||||||
@ -383,39 +95,35 @@ private:
|
|||||||
Iterator m_end; // exposition only
|
Iterator m_end; // exposition only
|
||||||
};
|
};
|
||||||
</pre>
|
</pre>
|
||||||
<p>If <tt class="docutils literal"><span class="pre">Iterator</span></tt> models Readable Lvalue Iterator and Bidirectional Traversal
|
<p>If <tt class="literal"><span class="pre">Iterator</span></tt> models Readable Lvalue Iterator and Forward Traversal
|
||||||
Iterator then <tt class="docutils literal"><span class="pre">iterator_category</span></tt> is convertible to
|
Iterator then <tt class="literal"><span class="pre">iterator_category</span></tt> is convertible to
|
||||||
<tt class="docutils literal"><span class="pre">std::bidirectional_iterator_tag</span></tt>.
|
<tt class="literal"><span class="pre">std::forward_iterator_tag</span></tt>. Otherwise <tt class="literal"><span class="pre">iterator_category</span></tt> is
|
||||||
Otherwise, if <tt class="docutils literal"><span class="pre">Iterator</span></tt> models Readable Lvalue Iterator and Forward Traversal
|
convertible to <tt class="literal"><span class="pre">std::input_iterator_tag</span></tt>.</p>
|
||||||
Iterator then <tt class="docutils literal"><span class="pre">iterator_category</span></tt> is convertible to
|
|
||||||
<tt class="docutils literal"><span class="pre">std::forward_iterator_tag</span></tt>.
|
|
||||||
Otherwise <tt class="docutils literal"><span class="pre">iterator_category</span></tt> is
|
|
||||||
convertible to <tt class="docutils literal"><span class="pre">std::input_iterator_tag</span></tt>.</p>
|
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="filter-iterator-requirements">
|
||||||
<h1><a class="toc-backref" href="#id3" id="filter-iterator-requirements" name="filter-iterator-requirements"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt> requirements</a></h1>
|
<h1><a class="toc-backref" href="#id3" name="filter-iterator-requirements"><tt class="literal"><span class="pre">filter_iterator</span></tt> requirements</a></h1>
|
||||||
<p>The <tt class="docutils literal"><span class="pre">Iterator</span></tt> argument shall meet the requirements of Readable
|
<p>The <tt class="literal"><span class="pre">Iterator</span></tt> argument shall meet the requirements of Readable
|
||||||
Iterator and Single Pass Iterator or it shall meet the requirements of
|
Iterator and Single Pass Iterator or it shall meet the requirements of
|
||||||
Input Iterator.</p>
|
Input Iterator.</p>
|
||||||
<p>The <tt class="docutils literal"><span class="pre">Predicate</span></tt> argument must be Assignable, Copy Constructible, and
|
<p>The <tt class="literal"><span class="pre">Predicate</span></tt> argument must be Assignable, Copy Constructible, and
|
||||||
the expression <tt class="docutils literal"><span class="pre">p(x)</span></tt> must be valid where <tt class="docutils literal"><span class="pre">p</span></tt> is an object of type
|
the expression <tt class="literal"><span class="pre">p(x)</span></tt> must be valid where <tt class="literal"><span class="pre">p</span></tt> is an object of type
|
||||||
<tt class="docutils literal"><span class="pre">Predicate</span></tt>, <tt class="docutils literal"><span class="pre">x</span></tt> is an object of type
|
<tt class="literal"><span class="pre">Predicate</span></tt>, <tt class="literal"><span class="pre">x</span></tt> is an object of type
|
||||||
<tt class="docutils literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>, and where the type of
|
<tt class="literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>, and where the type of
|
||||||
<tt class="docutils literal"><span class="pre">p(x)</span></tt> must be convertible to <tt class="docutils literal"><span class="pre">bool</span></tt>.</p>
|
<tt class="literal"><span class="pre">p(x)</span></tt> must be convertible to <tt class="literal"><span class="pre">bool</span></tt>.</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="filter-iterator-models">
|
||||||
<h1><a class="toc-backref" href="#id4" id="filter-iterator-models" name="filter-iterator-models"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt> models</a></h1>
|
<h1><a class="toc-backref" href="#id4" name="filter-iterator-models"><tt class="literal"><span class="pre">filter_iterator</span></tt> models</a></h1>
|
||||||
<p>The concepts that <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> models are dependent on which
|
<p>The concepts that <tt class="literal"><span class="pre">filter_iterator</span></tt> models are dependent on which
|
||||||
concepts the <tt class="docutils literal"><span class="pre">Iterator</span></tt> argument models, as specified in the
|
concepts the <tt class="literal"><span class="pre">Iterator</span></tt> argument models, as specified in the
|
||||||
following tables.</p>
|
following tables.</p>
|
||||||
<table border="1" class="docutils">
|
<table border="1" class="table">
|
||||||
<colgroup>
|
<colgroup>
|
||||||
<col width="44%" />
|
<col width="33%" />
|
||||||
<col width="56%" />
|
<col width="67%" />
|
||||||
</colgroup>
|
</colgroup>
|
||||||
<thead valign="bottom">
|
<thead valign="bottom">
|
||||||
<tr><th class="head">If <tt class="docutils literal"><span class="pre">Iterator</span></tt> models</th>
|
<tr><th>If <tt class="literal"><span class="pre">Iterator</span></tt> models</th>
|
||||||
<th class="head">then <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> models</th>
|
<th>then <tt class="literal"><span class="pre">filter_iterator</span></tt> models</th>
|
||||||
</tr>
|
</tr>
|
||||||
</thead>
|
</thead>
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
@ -425,19 +133,16 @@ following tables.</p>
|
|||||||
<tr><td>Forward Traversal Iterator</td>
|
<tr><td>Forward Traversal Iterator</td>
|
||||||
<td>Forward Traversal Iterator</td>
|
<td>Forward Traversal Iterator</td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr><td>Bidirectional Traversal Iterator</td>
|
|
||||||
<td>Bidirectional Traversal Iterator</td>
|
|
||||||
</tr>
|
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<table border="1" class="docutils">
|
<table border="1" class="table">
|
||||||
<colgroup>
|
<colgroup>
|
||||||
<col width="41%" />
|
<col width="41%" />
|
||||||
<col width="59%" />
|
<col width="59%" />
|
||||||
</colgroup>
|
</colgroup>
|
||||||
<thead valign="bottom">
|
<thead valign="bottom">
|
||||||
<tr><th class="head">If <tt class="docutils literal"><span class="pre">Iterator</span></tt> models</th>
|
<tr><th>If <tt class="literal"><span class="pre">Iterator</span></tt> models</th>
|
||||||
<th class="head">then <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> models</th>
|
<th>then <tt class="literal"><span class="pre">filter_iterator</span></tt> models</th>
|
||||||
</tr>
|
</tr>
|
||||||
</thead>
|
</thead>
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
@ -452,14 +157,14 @@ following tables.</p>
|
|||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<table border="1" class="docutils">
|
<table border="1" class="table">
|
||||||
<colgroup>
|
<colgroup>
|
||||||
<col width="63%" />
|
<col width="63%" />
|
||||||
<col width="38%" />
|
<col width="38%" />
|
||||||
</colgroup>
|
</colgroup>
|
||||||
<thead valign="bottom">
|
<thead valign="bottom">
|
||||||
<tr><th class="head">If <tt class="docutils literal"><span class="pre">Iterator</span></tt> models</th>
|
<tr><th>If <tt class="literal"><span class="pre">Iterator</span></tt> models</th>
|
||||||
<th class="head">then <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> models</th>
|
<th>then <tt class="literal"><span class="pre">filter_iterator</span></tt> models</th>
|
||||||
</tr>
|
</tr>
|
||||||
</thead>
|
</thead>
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
@ -472,54 +177,51 @@ following tables.</p>
|
|||||||
<tr><td>Writable Lvalue Iterator, Forward Traversal Iterator</td>
|
<tr><td>Writable Lvalue Iterator, Forward Traversal Iterator</td>
|
||||||
<td>Mutable Forward Iterator</td>
|
<td>Mutable Forward Iterator</td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr><td>Writable Lvalue Iterator, Bidirectional Iterator</td>
|
|
||||||
<td>Mutable Bidirectional Iterator</td>
|
|
||||||
</tr>
|
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">filter_iterator<P1,</span> <span class="pre">X></span></tt> is interoperable with <tt class="docutils literal"><span class="pre">filter_iterator<P2,</span> <span class="pre">Y></span></tt>
|
<p><tt class="literal"><span class="pre">filter_iterator<P1,</span> <span class="pre">X></span></tt> is interoperable with <tt class="literal"><span class="pre">filter_iterator<P2,</span> <span class="pre">Y></span></tt>
|
||||||
if and only if <tt class="docutils literal"><span class="pre">X</span></tt> is interoperable with <tt class="docutils literal"><span class="pre">Y</span></tt>.</p>
|
if and only if <tt class="literal"><span class="pre">X</span></tt> is interoperable with <tt class="literal"><span class="pre">Y</span></tt>.</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="filter-iterator-operations">
|
||||||
<h1><a class="toc-backref" href="#id5" id="filter-iterator-operations" name="filter-iterator-operations"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt> operations</a></h1>
|
<h1><a class="toc-backref" href="#id5" name="filter-iterator-operations"><tt class="literal"><span class="pre">filter_iterator</span></tt> operations</a></h1>
|
||||||
<p>In addition to those operations required by the concepts that
|
<p>In addition to those operations required by the concepts that
|
||||||
<tt class="docutils literal"><span class="pre">filter_iterator</span></tt> models, <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> provides the following
|
<tt class="literal"><span class="pre">filter_iterator</span></tt> models, <tt class="literal"><span class="pre">filter_iterator</span></tt> provides the following
|
||||||
operations.</p>
|
operations.</p>
|
||||||
<p><tt class="docutils literal"><span class="pre">filter_iterator();</span></tt></p>
|
<p><tt class="literal"><span class="pre">filter_iterator();</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="docutils literal"><span class="pre">Predicate</span></tt> and <tt class="docutils literal"><span class="pre">Iterator</span></tt> must be Default Constructible.</td>
|
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="literal"><span class="pre">Predicate</span></tt> and <tt class="literal"><span class="pre">Iterator</span></tt> must be Default Constructible.</td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> whose``m_pred``, <tt class="docutils literal"><span class="pre">m_iter</span></tt>, and <tt class="docutils literal"><span class="pre">m_end</span></tt>
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a <tt class="literal"><span class="pre">filter_iterator</span></tt> whose``m_pred``, <tt class="literal"><span class="pre">m_iter</span></tt>, and <tt class="literal"><span class="pre">m_end</span></tt>
|
||||||
members are a default constructed.</td>
|
members are a default constructed.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">filter_iterator(Predicate</span> <span class="pre">f,</span> <span class="pre">Iterator</span> <span class="pre">x,</span> <span class="pre">Iterator</span> <span class="pre">end</span> <span class="pre">=</span> <span class="pre">Iterator());</span></tt></p>
|
<p><tt class="literal"><span class="pre">filter_iterator(Predicate</span> <span class="pre">f,</span> <span class="pre">Iterator</span> <span class="pre">x,</span> <span class="pre">Iterator</span> <span class="pre">end</span> <span class="pre">=</span> <span class="pre">Iterator());</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> where <tt class="docutils literal"><span class="pre">m_iter</span></tt> is either
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a <tt class="literal"><span class="pre">filter_iterator</span></tt> where <tt class="literal"><span class="pre">m_iter</span></tt> is either
|
||||||
the first position in the range <tt class="docutils literal"><span class="pre">[x,end)</span></tt> such that <tt class="docutils literal"><span class="pre">f(*m_iter)</span> <span class="pre">==</span> <span class="pre">true</span></tt>
|
the first position in the range <tt class="literal"><span class="pre">[x,end)</span></tt> such that <tt class="literal"><span class="pre">f(*m_iter)</span> <span class="pre">==</span> <span class="pre">true</span></tt>
|
||||||
or else``m_iter == end``. The member <tt class="docutils literal"><span class="pre">m_pred</span></tt> is constructed from
|
or else``m_iter == end``. The member <tt class="literal"><span class="pre">m_pred</span></tt> is constructed from
|
||||||
<tt class="docutils literal"><span class="pre">f</span></tt> and <tt class="docutils literal"><span class="pre">m_end</span></tt> from <tt class="docutils literal"><span class="pre">end</span></tt>.</td>
|
<tt class="literal"><span class="pre">f</span></tt> and <tt class="literal"><span class="pre">m_end</span></tt> from <tt class="literal"><span class="pre">end</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">filter_iterator(Iterator</span> <span class="pre">x,</span> <span class="pre">Iterator</span> <span class="pre">end</span> <span class="pre">=</span> <span class="pre">Iterator());</span></tt></p>
|
<p><tt class="literal"><span class="pre">filter_iterator(Iterator</span> <span class="pre">x,</span> <span class="pre">Iterator</span> <span class="pre">end</span> <span class="pre">=</span> <span class="pre">Iterator());</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="docutils literal"><span class="pre">Predicate</span></tt> must be Default Constructible and
|
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="literal"><span class="pre">Predicate</span></tt> must be Default Constructible and
|
||||||
<tt class="docutils literal"><span class="pre">Predicate</span></tt> is a class type (not a function pointer).</td>
|
<tt class="literal"><span class="pre">Predicate</span></tt> is a class type (not a function pointer).</td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> where <tt class="docutils literal"><span class="pre">m_iter</span></tt> is either
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a <tt class="literal"><span class="pre">filter_iterator</span></tt> where <tt class="literal"><span class="pre">m_iter</span></tt> is either
|
||||||
the first position in the range <tt class="docutils literal"><span class="pre">[x,end)</span></tt> such that <tt class="docutils literal"><span class="pre">m_pred(*m_iter)</span> <span class="pre">==</span> <span class="pre">true</span></tt>
|
the first position in the range <tt class="literal"><span class="pre">[x,end)</span></tt> such that <tt class="literal"><span class="pre">m_pred(*m_iter)</span> <span class="pre">==</span> <span class="pre">true</span></tt>
|
||||||
or else``m_iter == end``. The member <tt class="docutils literal"><span class="pre">m_pred</span></tt> is default constructed.</td>
|
or else``m_iter == end``. The member <tt class="literal"><span class="pre">m_pred</span></tt> is default constructed.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
@ -530,74 +232,71 @@ filter_iterator(
|
|||||||
, typename enable_if_convertible<OtherIterator, Iterator>::type* = 0 // exposition
|
, typename enable_if_convertible<OtherIterator, Iterator>::type* = 0 // exposition
|
||||||
);``
|
);``
|
||||||
</pre>
|
</pre>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="docutils literal"><span class="pre">OtherIterator</span></tt> is implicitly convertible to <tt class="docutils literal"><span class="pre">Iterator</span></tt>.</td>
|
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="literal"><span class="pre">OtherIterator</span></tt> is implicitly convertible to <tt class="literal"><span class="pre">Iterator</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a filter iterator whose members are copied from <tt class="docutils literal"><span class="pre">t</span></tt>.</td>
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a filter iterator whose members are copied from <tt class="literal"><span class="pre">t</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">Predicate</span> <span class="pre">predicate()</span> <span class="pre">const;</span></tt></p>
|
<p><tt class="literal"><span class="pre">Predicate</span> <span class="pre">predicate()</span> <span class="pre">const;</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">m_pred</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_pred</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">Iterator</span> <span class="pre">end()</span> <span class="pre">const;</span></tt></p>
|
<p><tt class="literal"><span class="pre">Iterator</span> <span class="pre">end()</span> <span class="pre">const;</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">m_end</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_end</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">Iterator</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
<p><tt class="literal"><span class="pre">Iterator</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">m_iterator</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_iterator</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">reference</span> <span class="pre">operator*()</span> <span class="pre">const;</span></tt></p>
|
<p><tt class="literal"><span class="pre">reference</span> <span class="pre">operator*()</span> <span class="pre">const;</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">*m_iter</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*m_iter</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">filter_iterator&</span> <span class="pre">operator++();</span></tt></p>
|
<p><tt class="literal"><span class="pre">filter_iterator&</span> <span class="pre">operator++();</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Increments <tt class="docutils literal"><span class="pre">m_iter</span></tt> and then continues to
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Increments <tt class="literal"><span class="pre">m_iter</span></tt> and then continues to
|
||||||
increment <tt class="docutils literal"><span class="pre">m_iter</span></tt> until either <tt class="docutils literal"><span class="pre">m_iter</span> <span class="pre">==</span> <span class="pre">m_end</span></tt>
|
increment <tt class="literal"><span class="pre">m_iter</span></tt> until either <tt class="literal"><span class="pre">m_iter</span> <span class="pre">==</span> <span class="pre">m_end</span></tt>
|
||||||
or <tt class="docutils literal"><span class="pre">m_pred(*m_iter)</span> <span class="pre">==</span> <span class="pre">true</span></tt>.</td>
|
or <tt class="literal"><span class="pre">m_pred(*m_iter)</span> <span class="pre">==</span> <span class="pre">true</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">*this</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*this</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
template <class Predicate, class Iterator>
|
template <class Predicate, class Iterator>
|
||||||
filter_iterator<Predicate,Iterator>
|
filter_iterator<Predicate,Iterator>
|
||||||
make_filter_iterator(Predicate f, Iterator x, Iterator end = Iterator());
|
make_filter_iterator(Predicate f, Iterator x, Iterator end = Iterator());
|
||||||
</pre>
|
</pre>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
@ -610,7 +309,7 @@ template <class Predicate, class Iterator>
|
|||||||
filter_iterator<Predicate,Iterator>
|
filter_iterator<Predicate,Iterator>
|
||||||
make_filter_iterator(Iterator x, Iterator end = Iterator());
|
make_filter_iterator(Iterator x, Iterator end = Iterator());
|
||||||
</pre>
|
</pre>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
@ -618,16 +317,13 @@ make_filter_iterator(Iterator x, Iterator end = Iterator());
|
|||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="example">
|
||||||
<h1><a class="toc-backref" href="#id6" id="example" name="example">Example</a></h1>
|
<h1><a class="toc-backref" href="#id6" name="example">Example</a></h1>
|
||||||
<p>This example uses <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> and then
|
<p>This example uses <tt class="literal"><span class="pre">filter_iterator</span></tt> and then
|
||||||
<tt class="docutils literal"><span class="pre">make_filter_iterator</span></tt> to output only the positive integers from an
|
<tt class="literal"><span class="pre">make_filter_iterator</span></tt> to output only the positive integers from an
|
||||||
array of integers. Then <tt class="docutils literal"><span class="pre">make_filter_iterator</span></tt> is is used to output
|
array of integers. Then <tt class="literal"><span class="pre">make_filter_iterator</span></tt> is is used to output
|
||||||
the integers greater than <tt class="docutils literal"><span class="pre">-2</span></tt>.</p>
|
the integers greater than <tt class="literal"><span class="pre">-2</span></tt>.</p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
struct is_positive_number {
|
struct is_positive_number {
|
||||||
bool operator()(int x) { return 0 < x; }
|
bool operator()(int x) { return 0 < x; }
|
||||||
@ -685,5 +381,10 @@ int main()
|
|||||||
<p>The source code for this example can be found <a class="reference" href="../example/filter_iterator_example.cpp">here</a>.</p>
|
<p>The source code for this example can be found <a class="reference" href="../example/filter_iterator_example.cpp">here</a>.</p>
|
||||||
</div>
|
</div>
|
||||||
</div>
|
</div>
|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="filter_iterator.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
</div>
|
||||||
</body>
|
</body>
|
||||||
</html>
|
</html>
|
||||||
|
|||||||
Binary file not shown.
@ -1,7 +1,3 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
+++++++++++++++++
|
+++++++++++++++++
|
||||||
Filter Iterator
|
Filter Iterator
|
||||||
+++++++++++++++++
|
+++++++++++++++++
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
The filter iterator adaptor creates a view of an iterator range in
|
The filter iterator adaptor creates a view of an iterator range in
|
||||||
which some elements of the range are skipped. A predicate function
|
which some elements of the range are skipped. A predicate function
|
||||||
object controls which elements are skipped. When the predicate is
|
object controls which elements are skipped. When the predicate is
|
||||||
|
|||||||
@ -1,6 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
Example
|
Example
|
||||||
.......
|
.......
|
||||||
|
|||||||
249
doc/filter_iterator_ref.html
Executable file
249
doc/filter_iterator_ref.html
Executable file
@ -0,0 +1,249 @@
|
|||||||
|
<?xml version="1.0" encoding="utf-8" ?>
|
||||||
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||||||
|
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||||||
|
<head>
|
||||||
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||||||
|
<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
|
||||||
|
<title></title>
|
||||||
|
<link rel="stylesheet" href="default.css" type="text/css" />
|
||||||
|
</head>
|
||||||
|
<body>
|
||||||
|
<div class="document">
|
||||||
|
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt -->
|
||||||
|
<!-- 2004. Use, modification and distribution is subject to the Boost -->
|
||||||
|
<!-- Software License, Version 1.0. (See accompanying file -->
|
||||||
|
<!-- LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||||
|
<pre class="literal-block">
|
||||||
|
template <class Predicate, class Iterator>
|
||||||
|
class filter_iterator
|
||||||
|
{
|
||||||
|
public:
|
||||||
|
typedef iterator_traits<Iterator>::value_type value_type;
|
||||||
|
typedef iterator_traits<Iterator>::reference reference;
|
||||||
|
typedef iterator_traits<Iterator>::pointer pointer;
|
||||||
|
typedef iterator_traits<Iterator>::difference_type difference_type;
|
||||||
|
typedef /* see below */ iterator_category;
|
||||||
|
|
||||||
|
filter_iterator();
|
||||||
|
filter_iterator(Predicate f, Iterator x, Iterator end = Iterator());
|
||||||
|
filter_iterator(Iterator x, Iterator end = Iterator());
|
||||||
|
template<class OtherIterator>
|
||||||
|
filter_iterator(
|
||||||
|
filter_iterator<Predicate, OtherIterator> const& t
|
||||||
|
, typename enable_if_convertible<OtherIterator, Iterator>::type* = 0 // exposition
|
||||||
|
);
|
||||||
|
Predicate predicate() const;
|
||||||
|
Iterator end() const;
|
||||||
|
Iterator const& base() const;
|
||||||
|
reference operator*() const;
|
||||||
|
filter_iterator& operator++();
|
||||||
|
private:
|
||||||
|
Predicate m_pred; // exposition only
|
||||||
|
Iterator m_iter; // exposition only
|
||||||
|
Iterator m_end; // exposition only
|
||||||
|
};
|
||||||
|
</pre>
|
||||||
|
<p>If <tt class="literal"><span class="pre">Iterator</span></tt> models Readable Lvalue Iterator and Forward Traversal
|
||||||
|
Iterator then <tt class="literal"><span class="pre">iterator_category</span></tt> is convertible to
|
||||||
|
<tt class="literal"><span class="pre">std::forward_iterator_tag</span></tt>. Otherwise <tt class="literal"><span class="pre">iterator_category</span></tt> is
|
||||||
|
convertible to <tt class="literal"><span class="pre">std::input_iterator_tag</span></tt>.</p>
|
||||||
|
<div class="section" id="filter-iterator-requirements">
|
||||||
|
<h1><a name="filter-iterator-requirements"><tt class="literal"><span class="pre">filter_iterator</span></tt> requirements</a></h1>
|
||||||
|
<p>The <tt class="literal"><span class="pre">Iterator</span></tt> argument shall meet the requirements of Readable
|
||||||
|
Iterator and Single Pass Iterator or it shall meet the requirements of
|
||||||
|
Input Iterator.</p>
|
||||||
|
<p>The <tt class="literal"><span class="pre">Predicate</span></tt> argument must be Assignable, Copy Constructible, and
|
||||||
|
the expression <tt class="literal"><span class="pre">p(x)</span></tt> must be valid where <tt class="literal"><span class="pre">p</span></tt> is an object of type
|
||||||
|
<tt class="literal"><span class="pre">Predicate</span></tt>, <tt class="literal"><span class="pre">x</span></tt> is an object of type
|
||||||
|
<tt class="literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>, and where the type of
|
||||||
|
<tt class="literal"><span class="pre">p(x)</span></tt> must be convertible to <tt class="literal"><span class="pre">bool</span></tt>.</p>
|
||||||
|
</div>
|
||||||
|
<div class="section" id="filter-iterator-models">
|
||||||
|
<h1><a name="filter-iterator-models"><tt class="literal"><span class="pre">filter_iterator</span></tt> models</a></h1>
|
||||||
|
<p>The concepts that <tt class="literal"><span class="pre">filter_iterator</span></tt> models are dependent on which
|
||||||
|
concepts the <tt class="literal"><span class="pre">Iterator</span></tt> argument models, as specified in the
|
||||||
|
following tables.</p>
|
||||||
|
<table border="1" class="table">
|
||||||
|
<colgroup>
|
||||||
|
<col width="33%" />
|
||||||
|
<col width="67%" />
|
||||||
|
</colgroup>
|
||||||
|
<thead valign="bottom">
|
||||||
|
<tr><th>If <tt class="literal"><span class="pre">Iterator</span></tt> models</th>
|
||||||
|
<th>then <tt class="literal"><span class="pre">filter_iterator</span></tt> models</th>
|
||||||
|
</tr>
|
||||||
|
</thead>
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr><td>Single Pass Iterator</td>
|
||||||
|
<td>Single Pass Iterator</td>
|
||||||
|
</tr>
|
||||||
|
<tr><td>Forward Traversal Iterator</td>
|
||||||
|
<td>Forward Traversal Iterator</td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<table border="1" class="table">
|
||||||
|
<colgroup>
|
||||||
|
<col width="41%" />
|
||||||
|
<col width="59%" />
|
||||||
|
</colgroup>
|
||||||
|
<thead valign="bottom">
|
||||||
|
<tr><th>If <tt class="literal"><span class="pre">Iterator</span></tt> models</th>
|
||||||
|
<th>then <tt class="literal"><span class="pre">filter_iterator</span></tt> models</th>
|
||||||
|
</tr>
|
||||||
|
</thead>
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr><td>Readable Iterator</td>
|
||||||
|
<td>Readable Iterator</td>
|
||||||
|
</tr>
|
||||||
|
<tr><td>Writable Iterator</td>
|
||||||
|
<td>Writable Iterator</td>
|
||||||
|
</tr>
|
||||||
|
<tr><td>Lvalue Iterator</td>
|
||||||
|
<td>Lvalue Iterator</td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<table border="1" class="table">
|
||||||
|
<colgroup>
|
||||||
|
<col width="63%" />
|
||||||
|
<col width="38%" />
|
||||||
|
</colgroup>
|
||||||
|
<thead valign="bottom">
|
||||||
|
<tr><th>If <tt class="literal"><span class="pre">Iterator</span></tt> models</th>
|
||||||
|
<th>then <tt class="literal"><span class="pre">filter_iterator</span></tt> models</th>
|
||||||
|
</tr>
|
||||||
|
</thead>
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr><td>Readable Iterator, Single Pass Iterator</td>
|
||||||
|
<td>Input Iterator</td>
|
||||||
|
</tr>
|
||||||
|
<tr><td>Readable Lvalue Iterator, Forward Traversal Iterator</td>
|
||||||
|
<td>Forward Iterator</td>
|
||||||
|
</tr>
|
||||||
|
<tr><td>Writable Lvalue Iterator, Forward Traversal Iterator</td>
|
||||||
|
<td>Mutable Forward Iterator</td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">filter_iterator<P1,</span> <span class="pre">X></span></tt> is interoperable with <tt class="literal"><span class="pre">filter_iterator<P2,</span> <span class="pre">Y></span></tt>
|
||||||
|
if and only if <tt class="literal"><span class="pre">X</span></tt> is interoperable with <tt class="literal"><span class="pre">Y</span></tt>.</p>
|
||||||
|
</div>
|
||||||
|
<div class="section" id="filter-iterator-operations">
|
||||||
|
<h1><a name="filter-iterator-operations"><tt class="literal"><span class="pre">filter_iterator</span></tt> operations</a></h1>
|
||||||
|
<p>In addition to those operations required by the concepts that
|
||||||
|
<tt class="literal"><span class="pre">filter_iterator</span></tt> models, <tt class="literal"><span class="pre">filter_iterator</span></tt> provides the following
|
||||||
|
operations.</p>
|
||||||
|
<p><tt class="literal"><span class="pre">filter_iterator();</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="literal"><span class="pre">Predicate</span></tt> and <tt class="literal"><span class="pre">Iterator</span></tt> must be Default Constructible.</td>
|
||||||
|
</tr>
|
||||||
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a <tt class="literal"><span class="pre">filter_iterator</span></tt> whose``m_pred``, <tt class="literal"><span class="pre">m_iter</span></tt>, and <tt class="literal"><span class="pre">m_end</span></tt>
|
||||||
|
members are a default constructed.</td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">filter_iterator(Predicate</span> <span class="pre">f,</span> <span class="pre">Iterator</span> <span class="pre">x,</span> <span class="pre">Iterator</span> <span class="pre">end</span> <span class="pre">=</span> <span class="pre">Iterator());</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a <tt class="literal"><span class="pre">filter_iterator</span></tt> where <tt class="literal"><span class="pre">m_iter</span></tt> is either
|
||||||
|
the first position in the range <tt class="literal"><span class="pre">[x,end)</span></tt> such that <tt class="literal"><span class="pre">f(*m_iter)</span> <span class="pre">==</span> <span class="pre">true</span></tt>
|
||||||
|
or else``m_iter == end``. The member <tt class="literal"><span class="pre">m_pred</span></tt> is constructed from
|
||||||
|
<tt class="literal"><span class="pre">f</span></tt> and <tt class="literal"><span class="pre">m_end</span></tt> from <tt class="literal"><span class="pre">end</span></tt>.</td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">filter_iterator(Iterator</span> <span class="pre">x,</span> <span class="pre">Iterator</span> <span class="pre">end</span> <span class="pre">=</span> <span class="pre">Iterator());</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="literal"><span class="pre">Predicate</span></tt> must be Default Constructible and
|
||||||
|
<tt class="literal"><span class="pre">Predicate</span></tt> is a class type (not a function pointer).</td>
|
||||||
|
</tr>
|
||||||
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a <tt class="literal"><span class="pre">filter_iterator</span></tt> where <tt class="literal"><span class="pre">m_iter</span></tt> is either
|
||||||
|
the first position in the range <tt class="literal"><span class="pre">[x,end)</span></tt> such that <tt class="literal"><span class="pre">m_pred(*m_iter)</span> <span class="pre">==</span> <span class="pre">true</span></tt>
|
||||||
|
or else``m_iter == end``. The member <tt class="literal"><span class="pre">m_pred</span></tt> is default constructed.</td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<pre class="literal-block">
|
||||||
|
template <class OtherIterator>
|
||||||
|
filter_iterator(
|
||||||
|
filter_iterator<Predicate, OtherIterator> const& t
|
||||||
|
, typename enable_if_convertible<OtherIterator, Iterator>::type* = 0 // exposition
|
||||||
|
);``
|
||||||
|
</pre>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="literal"><span class="pre">OtherIterator</span></tt> is implicitly convertible to <tt class="literal"><span class="pre">Iterator</span></tt>.</td>
|
||||||
|
</tr>
|
||||||
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a filter iterator whose members are copied from <tt class="literal"><span class="pre">t</span></tt>.</td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">Predicate</span> <span class="pre">predicate()</span> <span class="pre">const;</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_pred</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">Iterator</span> <span class="pre">end()</span> <span class="pre">const;</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_end</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">Iterator</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_iterator</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">reference</span> <span class="pre">operator*()</span> <span class="pre">const;</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*m_iter</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">filter_iterator&</span> <span class="pre">operator++();</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Increments <tt class="literal"><span class="pre">m_iter</span></tt> and then continues to
|
||||||
|
increment <tt class="literal"><span class="pre">m_iter</span></tt> until either <tt class="literal"><span class="pre">m_iter</span> <span class="pre">==</span> <span class="pre">m_end</span></tt>
|
||||||
|
or <tt class="literal"><span class="pre">m_pred(*m_iter)</span> <span class="pre">==</span> <span class="pre">true</span></tt>.</td>
|
||||||
|
</tr>
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*this</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
</div>
|
||||||
|
</div>
|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="filter_iterator_ref.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
</div>
|
||||||
|
</body>
|
||||||
|
</html>
|
||||||
@ -35,13 +35,9 @@
|
|||||||
};
|
};
|
||||||
|
|
||||||
|
|
||||||
If ``Iterator`` models Readable Lvalue Iterator and Bidirectional Traversal
|
If ``Iterator`` models Readable Lvalue Iterator and Forward Traversal
|
||||||
Iterator then ``iterator_category`` is convertible to
|
Iterator then ``iterator_category`` is convertible to
|
||||||
``std::bidirectional_iterator_tag``.
|
``std::forward_iterator_tag``. Otherwise ``iterator_category`` is
|
||||||
Otherwise, if ``Iterator`` models Readable Lvalue Iterator and Forward Traversal
|
|
||||||
Iterator then ``iterator_category`` is convertible to
|
|
||||||
``std::forward_iterator_tag``.
|
|
||||||
Otherwise ``iterator_category`` is
|
|
||||||
convertible to ``std::input_iterator_tag``.
|
convertible to ``std::input_iterator_tag``.
|
||||||
|
|
||||||
|
|
||||||
@ -66,15 +62,13 @@ The concepts that ``filter_iterator`` models are dependent on which
|
|||||||
concepts the ``Iterator`` argument models, as specified in the
|
concepts the ``Iterator`` argument models, as specified in the
|
||||||
following tables.
|
following tables.
|
||||||
|
|
||||||
+---------------------------------+------------------------------------------+
|
+-----------------------------+----------------------------------------------------------+
|
||||||
| If ``Iterator`` models | then ``filter_iterator`` models |
|
| If ``Iterator`` models | then ``filter_iterator`` models |
|
||||||
+=================================+==========================================+
|
+=============================+==========================================================+
|
||||||
| Single Pass Iterator | Single Pass Iterator |
|
| Single Pass Iterator | Single Pass Iterator |
|
||||||
+---------------------------------+------------------------------------------+
|
+-----------------------------+----------------------------------------------------------+
|
||||||
| Forward Traversal Iterator | Forward Traversal Iterator |
|
| Forward Traversal Iterator | Forward Traversal Iterator |
|
||||||
+---------------------------------+------------------------------------------+
|
+-----------------------------+----------------------------------------------------------+
|
||||||
|Bidirectional Traversal Iterator |Bidirectional Traversal Iterator |
|
|
||||||
+---------------------------------+------------------------------------------+
|
|
||||||
|
|
||||||
+--------------------------------+----------------------------------------------+
|
+--------------------------------+----------------------------------------------+
|
||||||
| If ``Iterator`` models | then ``filter_iterator`` models |
|
| If ``Iterator`` models | then ``filter_iterator`` models |
|
||||||
@ -95,8 +89,6 @@ following tables.
|
|||||||
+-------------------------------------------------------+---------------------------------+
|
+-------------------------------------------------------+---------------------------------+
|
||||||
| Writable Lvalue Iterator, Forward Traversal Iterator | Mutable Forward Iterator |
|
| Writable Lvalue Iterator, Forward Traversal Iterator | Mutable Forward Iterator |
|
||||||
+-------------------------------------------------------+---------------------------------+
|
+-------------------------------------------------------+---------------------------------+
|
||||||
|Writable Lvalue Iterator, Bidirectional Iterator | Mutable Bidirectional Iterator |
|
|
||||||
+-------------------------------------------------------+---------------------------------+
|
|
||||||
|
|
||||||
|
|
||||||
``filter_iterator<P1, X>`` is interoperable with ``filter_iterator<P2, Y>``
|
``filter_iterator<P1, X>`` is interoperable with ``filter_iterator<P2, Y>``
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
The function output iterator adaptor makes it easier to create custom
|
The function output iterator adaptor makes it easier to create custom
|
||||||
output iterators. The adaptor takes a unary function and creates a
|
output iterators. The adaptor takes a unary function and creates a
|
||||||
model of Output Iterator. Each item assigned to the output iterator is
|
model of Output Iterator. Each item assigned to the output iterator is
|
||||||
|
|||||||
@ -1,14 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
Header
|
|
||||||
......
|
|
||||||
|
|
||||||
::
|
|
||||||
|
|
||||||
#include <boost/function_output_iterator.hpp>
|
|
||||||
|
|
||||||
::
|
::
|
||||||
|
|
||||||
template <class UnaryFunction>
|
template <class UnaryFunction>
|
||||||
|
|||||||
@ -3,298 +3,15 @@
|
|||||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||||||
<head>
|
<head>
|
||||||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||||||
<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
|
||||||
<title>Function Output Iterator</title>
|
<title>Function Output Iterator</title>
|
||||||
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
|
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
|
||||||
<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab, University of Hanover Institute for Transport Railway Operation and Construction" />
|
<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab, University of Hanover Institute for Transport Railway Operation and Construction" />
|
||||||
<meta name="date" content="2004-11-01" />
|
<meta name="date" content="2004-11-01" />
|
||||||
<meta name="copyright" content="Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003." />
|
<meta name="copyright" content="Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003." />
|
||||||
<style type="text/css">
|
<link rel="stylesheet" href="default.css" type="text/css" />
|
||||||
|
|
||||||
/*
|
|
||||||
:Author: David Goodger
|
|
||||||
:Contact: goodger@users.sourceforge.net
|
|
||||||
:Date: $Date$
|
|
||||||
:Revision: $Revision$
|
|
||||||
:Copyright: This stylesheet has been placed in the public domain.
|
|
||||||
|
|
||||||
Default cascading style sheet for the HTML output of Docutils.
|
|
||||||
|
|
||||||
See http://docutils.sf.net/docs/howto/html-stylesheets.html for how to
|
|
||||||
customize this style sheet.
|
|
||||||
*/
|
|
||||||
|
|
||||||
/* used to remove borders from tables and images */
|
|
||||||
.borderless, table.borderless td, table.borderless th {
|
|
||||||
border: 0 }
|
|
||||||
|
|
||||||
table.borderless td, table.borderless th {
|
|
||||||
/* Override padding for "table.docutils td" with "! important".
|
|
||||||
The right padding separates the table cells. */
|
|
||||||
padding: 0 0.5em 0 0 ! important }
|
|
||||||
|
|
||||||
.first {
|
|
||||||
/* Override more specific margin styles with "! important". */
|
|
||||||
margin-top: 0 ! important }
|
|
||||||
|
|
||||||
.last, .with-subtitle {
|
|
||||||
margin-bottom: 0 ! important }
|
|
||||||
|
|
||||||
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|
||||||
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|
|
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|
||||||
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|
|
||||||
text-decoration: none ;
|
|
||||||
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|
|
||||||
|
|
||||||
blockquote.epigraph {
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|
||||||
margin: 2em 5em ; }
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|
|
||||||
dl.docutils dd {
|
|
||||||
margin-bottom: 0.5em }
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|
||||||
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|
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|
|
||||||
dl.docutils dt {
|
|
||||||
font-weight: bold }
|
|
||||||
*/
|
|
||||||
|
|
||||||
div.abstract {
|
|
||||||
margin: 2em 5em }
|
|
||||||
|
|
||||||
div.abstract p.topic-title {
|
|
||||||
font-weight: bold ;
|
|
||||||
text-align: center }
|
|
||||||
|
|
||||||
div.admonition, div.attention, div.caution, div.danger, div.error,
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|
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div.hint, div.important, div.note, div.tip, div.warning {
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|
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margin: 2em ;
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|
||||||
border: medium outset ;
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|
||||||
padding: 1em }
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|
||||||
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|
||||||
div.admonition p.admonition-title, div.hint p.admonition-title,
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|
||||||
div.important p.admonition-title, div.note p.admonition-title,
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|
||||||
div.tip p.admonition-title {
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|
||||||
font-weight: bold ;
|
|
||||||
font-family: sans-serif }
|
|
||||||
|
|
||||||
div.attention p.admonition-title, div.caution p.admonition-title,
|
|
||||||
div.danger p.admonition-title, div.error p.admonition-title,
|
|
||||||
div.warning p.admonition-title {
|
|
||||||
color: red ;
|
|
||||||
font-weight: bold ;
|
|
||||||
font-family: sans-serif }
|
|
||||||
|
|
||||||
/* Uncomment (and remove this text!) to get reduced vertical space in
|
|
||||||
compound paragraphs.
|
|
||||||
div.compound .compound-first, div.compound .compound-middle {
|
|
||||||
margin-bottom: 0.5em }
|
|
||||||
|
|
||||||
div.compound .compound-last, div.compound .compound-middle {
|
|
||||||
margin-top: 0.5em }
|
|
||||||
*/
|
|
||||||
|
|
||||||
div.dedication {
|
|
||||||
margin: 2em 5em ;
|
|
||||||
text-align: center ;
|
|
||||||
font-style: italic }
|
|
||||||
|
|
||||||
div.dedication p.topic-title {
|
|
||||||
font-weight: bold ;
|
|
||||||
font-style: normal }
|
|
||||||
|
|
||||||
div.figure {
|
|
||||||
margin-left: 2em ;
|
|
||||||
margin-right: 2em }
|
|
||||||
|
|
||||||
div.footer, div.header {
|
|
||||||
clear: both;
|
|
||||||
font-size: smaller }
|
|
||||||
|
|
||||||
div.line-block {
|
|
||||||
display: block ;
|
|
||||||
margin-top: 1em ;
|
|
||||||
margin-bottom: 1em }
|
|
||||||
|
|
||||||
div.line-block div.line-block {
|
|
||||||
margin-top: 0 ;
|
|
||||||
margin-bottom: 0 ;
|
|
||||||
margin-left: 1.5em }
|
|
||||||
|
|
||||||
div.sidebar {
|
|
||||||
margin-left: 1em ;
|
|
||||||
border: medium outset ;
|
|
||||||
padding: 1em ;
|
|
||||||
background-color: #ffffee ;
|
|
||||||
width: 40% ;
|
|
||||||
float: right ;
|
|
||||||
clear: right }
|
|
||||||
|
|
||||||
div.sidebar p.rubric {
|
|
||||||
font-family: sans-serif ;
|
|
||||||
font-size: medium }
|
|
||||||
|
|
||||||
div.system-messages {
|
|
||||||
margin: 5em }
|
|
||||||
|
|
||||||
div.system-messages h1 {
|
|
||||||
color: red }
|
|
||||||
|
|
||||||
div.system-message {
|
|
||||||
border: medium outset ;
|
|
||||||
padding: 1em }
|
|
||||||
|
|
||||||
div.system-message p.system-message-title {
|
|
||||||
color: red ;
|
|
||||||
font-weight: bold }
|
|
||||||
|
|
||||||
div.topic {
|
|
||||||
margin: 2em }
|
|
||||||
|
|
||||||
h1.section-subtitle, h2.section-subtitle, h3.section-subtitle,
|
|
||||||
h4.section-subtitle, h5.section-subtitle, h6.section-subtitle {
|
|
||||||
margin-top: 0.4em }
|
|
||||||
|
|
||||||
h1.title {
|
|
||||||
text-align: center }
|
|
||||||
|
|
||||||
h2.subtitle {
|
|
||||||
text-align: center }
|
|
||||||
|
|
||||||
hr.docutils {
|
|
||||||
width: 75% }
|
|
||||||
|
|
||||||
img.align-left {
|
|
||||||
clear: left }
|
|
||||||
|
|
||||||
img.align-right {
|
|
||||||
clear: right }
|
|
||||||
|
|
||||||
ol.simple, ul.simple {
|
|
||||||
margin-bottom: 1em }
|
|
||||||
|
|
||||||
ol.arabic {
|
|
||||||
list-style: decimal }
|
|
||||||
|
|
||||||
ol.loweralpha {
|
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|
||||||
h4 tt.docutils, h5 tt.docutils, h6 tt.docutils {
|
|
||||||
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||||||
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||||||
</head>
|
</head>
|
||||||
<body>
|
<body>
|
||||||
<div class="document" id="function-output-iterator">
|
|
||||||
<h1 class="title">Function Output Iterator</h1>
|
<h1 class="title">Function Output Iterator</h1>
|
||||||
<table class="docinfo" frame="void" rules="none">
|
<table class="docinfo" frame="void" rules="none">
|
||||||
<col class="docinfo-name" />
|
<col class="docinfo-name" />
|
||||||
@ -314,17 +31,12 @@ Railway Operation and Construction</a></td></tr>
|
|||||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<!-- Distributed under the Boost -->
|
<div class="document" id="function-output-iterator">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<table class="field-list" frame="void" rules="none">
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
<tr class="field"><th class="field-name">abstract:</th><td class="field-body">The function output iterator adaptor makes it easier to create custom
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
The function output iterator adaptor makes it easier to create custom
|
|
||||||
output iterators. The adaptor takes a unary function and creates a
|
output iterators. The adaptor takes a unary function and creates a
|
||||||
model of Output Iterator. Each item assigned to the output iterator is
|
model of Output Iterator. Each item assigned to the output iterator is
|
||||||
passed as an argument to the unary function. The motivation for this
|
passed as an argument to the unary function. The motivation for this
|
||||||
@ -334,24 +46,15 @@ proxy object.</td>
|
|||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<div class="contents topic">
|
<div class="contents topic" id="table-of-contents">
|
||||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
<li><a class="reference" href="#header" id="id1" name="id1">Header</a></li>
|
<li><a class="reference" href="#function-output-iterator-requirements" id="id1" name="id1"><tt class="literal"><span class="pre">function_output_iterator</span></tt> requirements</a></li>
|
||||||
<li><a class="reference" href="#function-output-iterator-requirements" id="id2" name="id2"><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt> requirements</a></li>
|
<li><a class="reference" href="#function-output-iterator-models" id="id2" name="id2"><tt class="literal"><span class="pre">function_output_iterator</span></tt> models</a></li>
|
||||||
<li><a class="reference" href="#function-output-iterator-models" id="id3" name="id3"><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt> models</a></li>
|
<li><a class="reference" href="#function-output-iterator-operations" id="id3" name="id3"><tt class="literal"><span class="pre">function_output_iterator</span></tt> operations</a></li>
|
||||||
<li><a class="reference" href="#function-output-iterator-operations" id="id4" name="id4"><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt> operations</a></li>
|
<li><a class="reference" href="#example" id="id4" name="id4">Example</a></li>
|
||||||
<li><a class="reference" href="#example" id="id5" name="id5">Example</a></li>
|
|
||||||
</ul>
|
</ul>
|
||||||
</div>
|
</div>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<div class="section">
|
|
||||||
<h1><a class="toc-backref" href="#id1" id="header" name="header">Header</a></h1>
|
|
||||||
<pre class="literal-block">
|
|
||||||
#include <boost/function_output_iterator.hpp>
|
|
||||||
</pre>
|
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
template <class UnaryFunction>
|
template <class UnaryFunction>
|
||||||
class function_output_iterator {
|
class function_output_iterator {
|
||||||
@ -373,62 +76,58 @@ private:
|
|||||||
UnaryFunction m_f; // exposition only
|
UnaryFunction m_f; // exposition only
|
||||||
};
|
};
|
||||||
</pre>
|
</pre>
|
||||||
|
<div class="section" id="function-output-iterator-requirements">
|
||||||
|
<h1><a class="toc-backref" href="#id1" name="function-output-iterator-requirements"><tt class="literal"><span class="pre">function_output_iterator</span></tt> requirements</a></h1>
|
||||||
|
<p><tt class="literal"><span class="pre">UnaryFunction</span></tt> must be Assignable and Copy Constructible.</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="function-output-iterator-models">
|
||||||
<h1><a class="toc-backref" href="#id2" id="function-output-iterator-requirements" name="function-output-iterator-requirements"><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt> requirements</a></h1>
|
<h1><a class="toc-backref" href="#id2" name="function-output-iterator-models"><tt class="literal"><span class="pre">function_output_iterator</span></tt> models</a></h1>
|
||||||
<p><tt class="docutils literal"><span class="pre">UnaryFunction</span></tt> must be Assignable and Copy Constructible.</p>
|
<p><tt class="literal"><span class="pre">function_output_iterator</span></tt> is a model of the Writable and
|
||||||
</div>
|
|
||||||
<div class="section">
|
|
||||||
<h1><a class="toc-backref" href="#id3" id="function-output-iterator-models" name="function-output-iterator-models"><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt> models</a></h1>
|
|
||||||
<p><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt> is a model of the Writable and
|
|
||||||
Incrementable Iterator concepts.</p>
|
Incrementable Iterator concepts.</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="function-output-iterator-operations">
|
||||||
<h1><a class="toc-backref" href="#id4" id="function-output-iterator-operations" name="function-output-iterator-operations"><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt> operations</a></h1>
|
<h1><a class="toc-backref" href="#id3" name="function-output-iterator-operations"><tt class="literal"><span class="pre">function_output_iterator</span></tt> operations</a></h1>
|
||||||
<p><tt class="docutils literal"><span class="pre">explicit</span> <span class="pre">function_output_iterator(const</span> <span class="pre">UnaryFunction&</span> <span class="pre">f</span> <span class="pre">=</span> <span class="pre">UnaryFunction());</span></tt></p>
|
<p><tt class="literal"><span class="pre">explicit</span> <span class="pre">function_output_iterator(const</span> <span class="pre">UnaryFunction&</span> <span class="pre">f</span> <span class="pre">=</span> <span class="pre">UnaryFunction());</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="docutils literal"><span class="pre">function_output_iterator</span></tt>
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="literal"><span class="pre">function_output_iterator</span></tt>
|
||||||
with <tt class="docutils literal"><span class="pre">m_f</span></tt> constructed from <tt class="docutils literal"><span class="pre">f</span></tt>.</td>
|
with <tt class="literal"><span class="pre">m_f</span></tt> constructed from <tt class="literal"><span class="pre">f</span></tt>.</td>
|
||||||
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|
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|
||||||
</tbody>
|
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|
||||||
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|
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|
||||||
<p><tt class="docutils literal"><span class="pre">operator*();</span></tt></p>
|
<p><tt class="literal"><span class="pre">operator*();</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
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|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">An object <tt class="docutils literal"><span class="pre">r</span></tt> of unspecified type such that <tt class="docutils literal"><span class="pre">r</span> <span class="pre">=</span> <span class="pre">t</span></tt>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">An object <tt class="literal"><span class="pre">r</span></tt> of unspecified type such that <tt class="literal"><span class="pre">r</span> <span class="pre">=</span> <span class="pre">t</span></tt>
|
||||||
is equivalent to <tt class="docutils literal"><span class="pre">m_f(t)</span></tt> for all <tt class="docutils literal"><span class="pre">t</span></tt>.</td>
|
is equivalent to <tt class="literal"><span class="pre">m_f(t)</span></tt> for all <tt class="literal"><span class="pre">t</span></tt>.</td>
|
||||||
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|
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|
||||||
</tbody>
|
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|
||||||
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|
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|
||||||
<p><tt class="docutils literal"><span class="pre">function_output_iterator&</span> <span class="pre">operator++();</span></tt></p>
|
<p><tt class="literal"><span class="pre">function_output_iterator&</span> <span class="pre">operator++();</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">*this</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*this</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">function_output_iterator&</span> <span class="pre">operator++(int);</span></tt></p>
|
<p><tt class="literal"><span class="pre">function_output_iterator&</span> <span class="pre">operator++(int);</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
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|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
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|
||||||
<tbody valign="top">
|
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|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">*this</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*this</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="example">
|
||||||
<h1><a class="toc-backref" href="#id5" id="example" name="example">Example</a></h1>
|
<h1><a class="toc-backref" href="#id4" name="example">Example</a></h1>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
struct string_appender
|
struct string_appender
|
||||||
{
|
{
|
||||||
@ -463,5 +162,10 @@ int main(int, char*[])
|
|||||||
</pre>
|
</pre>
|
||||||
</div>
|
</div>
|
||||||
</div>
|
</div>
|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="function_output_iterator.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
</div>
|
||||||
</body>
|
</body>
|
||||||
</html>
|
</html>
|
||||||
|
|||||||
Binary file not shown.
@ -1,7 +1,3 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
++++++++++++++++++++++++++
|
++++++++++++++++++++++++++
|
||||||
Function Output Iterator
|
Function Output Iterator
|
||||||
++++++++++++++++++++++++++
|
++++++++++++++++++++++++++
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
Example
|
Example
|
||||||
.......
|
.......
|
||||||
|
|
||||||
|
|||||||
418
doc/index.html
418
doc/index.html
@ -3,300 +3,15 @@
|
|||||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
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|
||||||
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|
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|
||||||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||||||
<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
|
||||||
<title>The Boost.Iterator Library Boost</title>
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</head>
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</head>
|
||||||
<body>
|
<body>
|
||||||
<div class="document" id="the-boost-iterator-library-logo">
|
|
||||||
<h1 class="title">The Boost.Iterator Library <a class="reference" href="../../../index.htm"><img alt="Boost" src="../../../boost.png" /></a></h1>
|
<h1 class="title">The Boost.Iterator Library <a class="reference" href="../../../index.htm"><img alt="Boost" src="../../../boost.png" /></a></h1>
|
||||||
<!-- Distributed under the Boost -->
|
<div class="document" id="the-boost-iterator-library-logo">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<hr />
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
<table class="field-list" frame="void" rules="none">
|
||||||
<hr class="docutils" />
|
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
@ -313,7 +28,7 @@ Lab</a>, <a class="reference" href="http://www.styleadvisor.com">Zephyr Associat
|
|||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
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||||||
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||||||
<col class="field-body" />
|
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|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
@ -335,8 +50,8 @@ older Boost Iterator Adaptor Library.</td>
|
|||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<div class="contents topic">
|
<div class="contents topic" id="table-of-contents">
|
||||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents"><strong>Table of Contents</strong></a></p>
|
<p class="topic-title first"><a name="table-of-contents"><strong>Table of Contents</strong></a></p>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
<li><a class="reference" href="#new-style-iterators" id="id22" name="id22">New-Style Iterators</a></li>
|
<li><a class="reference" href="#new-style-iterators" id="id22" name="id22">New-Style Iterators</a></li>
|
||||||
<li><a class="reference" href="#iterator-facade-and-adaptor" id="id23" name="id23">Iterator Facade and Adaptor</a></li>
|
<li><a class="reference" href="#iterator-facade-and-adaptor" id="id23" name="id23">Iterator Facade and Adaptor</a></li>
|
||||||
@ -350,133 +65,133 @@ older Boost Iterator Adaptor Library.</td>
|
|||||||
<li><a class="reference" href="#history" id="id29" name="id29">History</a></li>
|
<li><a class="reference" href="#history" id="id29" name="id29">History</a></li>
|
||||||
</ul>
|
</ul>
|
||||||
</div>
|
</div>
|
||||||
<hr class="docutils" />
|
<hr />
|
||||||
<div class="section">
|
<div class="section" id="new-style-iterators">
|
||||||
<h1><a class="toc-backref" href="#id22" id="new-style-iterators" name="new-style-iterators">New-Style Iterators</a></h1>
|
<h1><a class="toc-backref" href="#id22" name="new-style-iterators">New-Style Iterators</a></h1>
|
||||||
<p>The iterator categories defined in C++98 are extremely limiting
|
<p>The iterator categories defined in C++98 are extremely limiting
|
||||||
because they bind together two orthogonal concepts: traversal and
|
because they bind together two orthogonal concepts: traversal and
|
||||||
element access. For example, because a random access iterator is
|
element access. For example, because a random access iterator is
|
||||||
required to return a reference (and not a proxy) when dereferenced,
|
required to return a reference (and not a proxy) when dereferenced,
|
||||||
it is impossible to capture the capabilities of
|
it is impossible to capture the capabilities of
|
||||||
<tt class="docutils literal"><span class="pre">vector<bool>::iterator</span></tt> using the C++98 categories. This is the
|
<tt class="literal"><span class="pre">vector<bool>::iterator</span></tt> using the C++98 categories. This is the
|
||||||
infamous "<tt class="docutils literal"><span class="pre">vector<bool></span></tt> is not a container, and its iterators
|
infamous "<tt class="literal"><span class="pre">vector<bool></span></tt> is not a container, and its iterators
|
||||||
aren't random access iterators", debacle about which Herb Sutter
|
aren't random access iterators", debacle about which Herb Sutter
|
||||||
wrote two papers for the standards comittee (<a class="reference" href="http://www.gotw.ca/publications/N1185.pdf">n1185</a> and <a class="reference" href="http://www.gotw.ca/publications/N1211.pdf">n1211</a>),
|
wrote two papers for the standards comittee (<a class="reference" href="http://www.gotw.ca/publications/N1185.pdf">n1185</a> and <a class="reference" href="http://www.gotw.ca/publications/N1211.pdf">n1211</a>),
|
||||||
and a <a class="reference" href="http://www.gotw.ca/gotw/050.htm">Guru of the Week</a>. New-style iterators go well beyond
|
and a <a class="reference" href="http://www.gotw.ca/gotw/050.htm">Guru of the Week</a>. New-style iterators go well beyond
|
||||||
patching up <tt class="docutils literal"><span class="pre">vector<bool></span></tt>, though: there are lots of other
|
patching up <tt class="literal"><span class="pre">vector<bool></span></tt>, though: there are lots of other
|
||||||
iterators already in use which can't be adequately represented by
|
iterators already in use which can't be adequately represented by
|
||||||
the existing concepts. For details about the new iterator
|
the existing concepts. For details about the new iterator
|
||||||
concepts, see our</p>
|
concepts, see our</p>
|
||||||
<blockquote>
|
<blockquote>
|
||||||
<a class="reference" href="new-iter-concepts.html">Standard Proposal For New-Style Iterators</a> (<a class="reference" href="new-iter-concepts.pdf">PDF</a>)</blockquote>
|
<a class="reference" href="new-iter-concepts.html">Standard Proposal For New-Style Iterators</a> (<a class="reference" href="new-iter-concepts.pdf">PDF</a>)</blockquote>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="iterator-facade-and-adaptor">
|
||||||
<h1><a class="toc-backref" href="#id23" id="iterator-facade-and-adaptor" name="iterator-facade-and-adaptor">Iterator Facade and Adaptor</a></h1>
|
<h1><a class="toc-backref" href="#id23" name="iterator-facade-and-adaptor">Iterator Facade and Adaptor</a></h1>
|
||||||
<p>Writing standard-conforming iterators is tricky, but the need comes
|
<p>Writing standard-conforming iterators is tricky, but the need comes
|
||||||
up often. In order to ease the implementation of new iterators,
|
up often. In order to ease the implementation of new iterators,
|
||||||
the Boost.Iterator library provides the <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> class template,
|
the Boost.Iterator library provides the <tt class="literal"><span class="pre">iterator_facade</span></tt> class template,
|
||||||
which implements many useful defaults and compile-time checks
|
which implements many useful defaults and compile-time checks
|
||||||
designed to help the iterator author ensure that his iterator is
|
designed to help the iterator author ensure that his iterator is
|
||||||
correct.</p>
|
correct.</p>
|
||||||
<p>It is also common to define a new iterator that is similar to some
|
<p>It is also common to define a new iterator that is similar to some
|
||||||
underlying iterator or iterator-like type, but that modifies some
|
underlying iterator or iterator-like type, but that modifies some
|
||||||
aspect of the underlying type's behavior. For that purpose, the
|
aspect of the underlying type's behavior. For that purpose, the
|
||||||
library supplies the <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> class template, which is specially
|
library supplies the <tt class="literal"><span class="pre">iterator_adaptor</span></tt> class template, which is specially
|
||||||
designed to take advantage of as much of the underlying type's
|
designed to take advantage of as much of the underlying type's
|
||||||
behavior as possible.</p>
|
behavior as possible.</p>
|
||||||
<p>The documentation for these two classes can be found at the following
|
<p>The documentation for these two classes can be found at the following
|
||||||
web pages:</p>
|
web pages:</p>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
<li><a class="reference" href="iterator_facade.html"><tt class="docutils literal"><span class="pre">iterator_facade</span></tt></a> (<a class="reference" href="iterator_facade.pdf">PDF</a>)</li>
|
<li><a class="reference" href="iterator_facade.html"><tt class="literal"><span class="pre">iterator_facade</span></tt></a> (<a class="reference" href="iterator_facade.pdf">PDF</a>)</li>
|
||||||
<li><a class="reference" href="iterator_adaptor.html"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt></a> (<a class="reference" href="iterator_adaptor.pdf">PDF</a>)</li>
|
<li><a class="reference" href="iterator_adaptor.html"><tt class="literal"><span class="pre">iterator_adaptor</span></tt></a> (<a class="reference" href="iterator_adaptor.pdf">PDF</a>)</li>
|
||||||
</ul>
|
</ul>
|
||||||
<p>Both <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> and <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> as well as many of the <a class="reference" href="#specialized-adaptors">specialized
|
<p>Both <tt class="literal"><span class="pre">iterator_facade</span></tt> and <tt class="literal"><span class="pre">iterator_adaptor</span></tt> as well as many of the <a class="reference" href="#specialized-adaptors">specialized
|
||||||
adaptors</a> mentioned below have been proposed for standardization,
|
adaptors</a> mentioned below have been proposed for standardization,
|
||||||
and accepted into the first C++ technical report; see our</p>
|
and accepted into the first C++ technical report; see our</p>
|
||||||
<blockquote>
|
<blockquote>
|
||||||
<a class="reference" href="facade-and-adaptor.html">Standard Proposal For Iterator Facade and Adaptor</a> (<a class="reference" href="facade-and-adaptor.pdf">PDF</a>)</blockquote>
|
<a class="reference" href="facade-and-adaptor.html">Standard Proposal For Iterator Facade and Adaptor</a> (<a class="reference" href="facade-and-adaptor.pdf">PDF</a>)</blockquote>
|
||||||
<p>for more details.</p>
|
<p>for more details.</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="specialized-adaptors">
|
||||||
<h1><a class="toc-backref" href="#id24" id="specialized-adaptors" name="specialized-adaptors">Specialized Adaptors</a></h1>
|
<h1><a class="toc-backref" href="#id24" name="specialized-adaptors">Specialized Adaptors</a></h1>
|
||||||
<p>The iterator library supplies a useful suite of standard-conforming
|
<p>The iterator library supplies a useful suite of standard-conforming
|
||||||
iterator templates based on the Boost <a class="reference" href="#iterator-facade-and-adaptor">iterator facade and adaptor</a>.</p>
|
iterator templates based on the Boost <a class="reference" href="#iterator-facade-and-adaptor">iterator facade and adaptor</a>.</p>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
<li><a class="reference" href="counting_iterator.html"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt></a> (<a class="reference" href="counting_iterator.pdf">PDF</a>): an iterator over a sequence of consecutive values.
|
<li><a class="reference" href="counting_iterator.html"><tt class="literal"><span class="pre">counting_iterator</span></tt></a> (<a class="reference" href="counting_iterator.pdf">PDF</a>): an iterator over a sequence of consecutive values.
|
||||||
Implements a "lazy sequence"</li>
|
Implements a "lazy sequence"</li>
|
||||||
<li><a class="reference" href="filter_iterator.html"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt></a> (<a class="reference" href="filter_iterator.pdf">PDF</a>): an iterator over the subset of elements of some
|
<li><a class="reference" href="filter_iterator.html"><tt class="literal"><span class="pre">filter_iterator</span></tt></a> (<a class="reference" href="filter_iterator.pdf">PDF</a>): an iterator over the subset of elements of some
|
||||||
sequence which satisfy a given predicate</li>
|
sequence which satisfy a given predicate</li>
|
||||||
<li><a class="reference" href="function_output_iterator.html"><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt></a> (<a class="reference" href="function_output_iterator.pdf">PDF</a>): an output iterator wrapping a unary function
|
<li><a class="reference" href="function_output_iterator.html"><tt class="literal"><span class="pre">function_output_iterator</span></tt></a> (<a class="reference" href="function_output_iterator.pdf">PDF</a>): an output iterator wrapping a unary function
|
||||||
object; each time an element is written into the dereferenced
|
object; each time an element is written into the dereferenced
|
||||||
iterator, it is passed as a parameter to the function object.</li>
|
iterator, it is passed as a parameter to the function object.</li>
|
||||||
<li><a class="reference" href="indirect_iterator.html"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt></a> (<a class="reference" href="indirect_iterator.pdf">PDF</a>): an iterator over the objects <em>pointed-to</em> by the
|
<li><a class="reference" href="indirect_iterator.html"><tt class="literal"><span class="pre">indirect_iterator</span></tt></a> (<a class="reference" href="indirect_iterator.pdf">PDF</a>): an iterator over the objects <em>pointed-to</em> by the
|
||||||
elements of some sequence.</li>
|
elements of some sequence.</li>
|
||||||
<li><a class="reference" href="permutation_iterator.html"><tt class="docutils literal"><span class="pre">permutation_iterator</span></tt></a> (<a class="reference" href="permutation_iterator.pdf">PDF</a>): an iterator over the elements of some random-access
|
<li><a class="reference" href="permutation_iterator.html"><tt class="literal"><span class="pre">permutation_iterator</span></tt></a> (<a class="reference" href="permutation_iterator.pdf">PDF</a>): an iterator over the elements of some random-access
|
||||||
sequence, rearranged according to some sequence of integer indices.</li>
|
sequence, rearranged according to some sequence of integer indices.</li>
|
||||||
<li><a class="reference" href="reverse_iterator.html"><tt class="docutils literal"><span class="pre">reverse_iterator</span></tt></a> (<a class="reference" href="reverse_iterator.pdf">PDF</a>): an iterator which traverses the elements of some
|
<li><a class="reference" href="reverse_iterator.html"><tt class="literal"><span class="pre">reverse_iterator</span></tt></a> (<a class="reference" href="reverse_iterator.pdf">PDF</a>): an iterator which traverses the elements of some
|
||||||
bidirectional sequence in reverse. Corrects many of the
|
bidirectional sequence in reverse. Corrects many of the
|
||||||
shortcomings of C++98's <tt class="docutils literal"><span class="pre">std::reverse_iterator</span></tt>.</li>
|
shortcomings of C++98's <tt class="literal"><span class="pre">std::reverse_iterator</span></tt>.</li>
|
||||||
<li><a class="reference" href="../../utility/shared_container_iterator.html"><tt class="docutils literal"><span class="pre">shared_container_iterator</span></tt></a>: an iterator over elements of a container whose
|
<li><a class="reference" href="../../utility/shared_container_iterator.html"><tt class="literal"><span class="pre">shared_container_iterator</span></tt></a>: an iterator over elements of a container whose
|
||||||
lifetime is maintained by a <a class="reference" href="../../smart_ptr/shared_ptr.htm"><tt class="docutils literal"><span class="pre">shared_ptr</span></tt></a> stored in the iterator.</li>
|
lifetime is maintained by a <a class="reference" href="../../smart_ptr/shared_ptr.htm"><tt class="literal"><span class="pre">shared_ptr</span></tt></a> stored in the iterator.</li>
|
||||||
<li><a class="reference" href="transform_iterator.html"><tt class="docutils literal"><span class="pre">transform_iterator</span></tt></a> (<a class="reference" href="transform_iterator.pdf">PDF</a>): an iterator over elements which are the result of
|
<li><a class="reference" href="transform_iterator.html"><tt class="literal"><span class="pre">transform_iterator</span></tt></a> (<a class="reference" href="transform_iterator.pdf">PDF</a>): an iterator over elements which are the result of
|
||||||
applying some functional transformation to the elements of an
|
applying some functional transformation to the elements of an
|
||||||
underlying sequence. This component also replaces the old
|
underlying sequence. This component also replaces the old
|
||||||
<tt class="docutils literal"><span class="pre">projection_iterator_adaptor</span></tt>.</li>
|
<tt class="literal"><span class="pre">projection_iterator_adaptor</span></tt>.</li>
|
||||||
<li><a class="reference" href="zip_iterator.html"><tt class="docutils literal"><span class="pre">zip_iterator</span></tt></a> (<a class="reference" href="zip_iterator.pdf">PDF</a>): an iterator over tuples of the elements at corresponding
|
<li><a class="reference" href="zip_iterator.html"><tt class="literal"><span class="pre">zip_iterator</span></tt></a> (<a class="reference" href="zip_iterator.pdf">PDF</a>): an iterator over tuples of the elements at corresponding
|
||||||
positions of heterogeneous underlying iterators.</li>
|
positions of heterogeneous underlying iterators.</li>
|
||||||
</ul>
|
</ul>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="iterator-utilities">
|
||||||
<h1><a class="toc-backref" href="#id25" id="iterator-utilities" name="iterator-utilities">Iterator Utilities</a></h1>
|
<h1><a class="toc-backref" href="#id25" name="iterator-utilities">Iterator Utilities</a></h1>
|
||||||
<div class="section">
|
<div class="section" id="traits">
|
||||||
<h2><a class="toc-backref" href="#id26" id="traits" name="traits">Traits</a></h2>
|
<h2><a class="toc-backref" href="#id26" name="traits">Traits</a></h2>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
<li><a class="reference" href="pointee.html"><tt class="docutils literal"><span class="pre">pointee.hpp</span></tt></a> (<a class="reference" href="pointee.pdf">PDF</a>): Provides the capability to deduce the referent types
|
<li><a class="reference" href="pointee.html"><tt class="literal"><span class="pre">pointee.hpp</span></tt></a> (<a class="reference" href="pointee.pdf">PDF</a>): Provides the capability to deduce the referent types
|
||||||
of pointers, smart pointers and iterators in generic code. Used
|
of pointers, smart pointers and iterators in generic code. Used
|
||||||
in <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt>.</li>
|
in <tt class="literal"><span class="pre">indirect_iterator</span></tt>.</li>
|
||||||
<li><a class="reference" href="iterator_traits.html"><tt class="docutils literal"><span class="pre">iterator_traits.hpp</span></tt></a> (<a class="reference" href="iterator_traits.pdf">PDF</a>): Provides <a class="reference" href="../../mpl/doc/index.html">MPL</a>-compatible metafunctions which
|
<li><a class="reference" href="iterator_traits.html"><tt class="literal"><span class="pre">iterator_traits.hpp</span></tt></a> (<a class="reference" href="iterator_traits.pdf">PDF</a>): Provides <a class="reference" href="../../mpl/doc/index.html">MPL</a>-compatible metafunctions which
|
||||||
retrieve an iterator's traits. Also corrects for the deficiencies
|
retrieve an iterator's traits. Also corrects for the deficiencies
|
||||||
of broken implementations of <tt class="docutils literal"><span class="pre">std::iterator_traits</span></tt>.</li>
|
of broken implementations of <tt class="literal"><span class="pre">std::iterator_traits</span></tt>.</li>
|
||||||
</ul>
|
</ul>
|
||||||
<!-- * |interoperable|_ (PDF__): Provides an MPL_\ -compatible metafunction for
|
<!-- * |interoperable|_ (PDF__): Provides an MPL_\ -compatible metafunction for
|
||||||
testing iterator interoperability -->
|
testing iterator interoperability -->
|
||||||
<!-- comment! __ interoperable.pdf -->
|
<!-- comment! __ interoperable.pdf -->
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="testing-and-concept-checking">
|
||||||
<h2><a class="toc-backref" href="#id27" id="testing-and-concept-checking" name="testing-and-concept-checking">Testing and Concept Checking</a></h2>
|
<h2><a class="toc-backref" href="#id27" name="testing-and-concept-checking">Testing and Concept Checking</a></h2>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
<li><a class="reference" href="iterator_concepts.html"><tt class="docutils literal"><span class="pre">iterator_concepts.hpp</span></tt></a> (<a class="reference" href="iterator_concepts.pdf">PDF</a>): Concept checking classes for the new iterator concepts.</li>
|
<li><a class="reference" href="iterator_concepts.html"><tt class="literal"><span class="pre">iterator_concepts.hpp</span></tt></a> (<a class="reference" href="iterator_concepts.pdf">PDF</a>): Concept checking classes for the new iterator concepts.</li>
|
||||||
<li><a class="reference" href="iterator_archetypes.html"><tt class="docutils literal"><span class="pre">iterator_archetypes.hpp</span></tt></a> (<a class="reference" href="iterator_archetypes.pdf">PDF</a>): Concept archetype classes for the new iterators concepts.</li>
|
<li><a class="reference" href="iterator_archetypes.html"><tt class="literal"><span class="pre">iterator_archetypes.hpp</span></tt></a> (<a class="reference" href="iterator_archetypes.pdf">PDF</a>): Concept archetype classes for the new iterators concepts.</li>
|
||||||
</ul>
|
</ul>
|
||||||
</div>
|
</div>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="upgrading-from-the-old-boost-iterator-adaptor-library">
|
||||||
<h1><a class="toc-backref" href="#id28" id="upgrading-from-the-old-boost-iterator-adaptor-library" name="upgrading-from-the-old-boost-iterator-adaptor-library">Upgrading from the old Boost Iterator Adaptor Library</a></h1>
|
<h1><a class="toc-backref" href="#id28" name="upgrading-from-the-old-boost-iterator-adaptor-library">Upgrading from the old Boost Iterator Adaptor Library</a></h1>
|
||||||
<p id="upgrading">If you have been using the old Boost Iterator Adaptor library to
|
<a class="target" id="upgrading" name="upgrading"></a><p>If you have been using the old Boost Iterator Adaptor library to
|
||||||
implement iterators, you probably wrote a <tt class="docutils literal"><span class="pre">Policies</span></tt> class which
|
implement iterators, you probably wrote a <tt class="literal"><span class="pre">Policies</span></tt> class which
|
||||||
captures the core operations of your iterator. In the new library
|
captures the core operations of your iterator. In the new library
|
||||||
design, you'll move those same core operations into the body of the
|
design, you'll move those same core operations into the body of the
|
||||||
iterator class itself. If you were writing a family of iterators,
|
iterator class itself. If you were writing a family of iterators,
|
||||||
you probably wrote a <a class="reference" href="../../../more/generic_programming.html#type_generator">type generator</a> to build the
|
you probably wrote a <a class="reference" href="../../../more/generic_programming.html#type_generator">type generator</a> to build the
|
||||||
<tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> specialization you needed; in the new library
|
<tt class="literal"><span class="pre">iterator_adaptor</span></tt> specialization you needed; in the new library
|
||||||
design you don't need a type generator (though may want to keep it
|
design you don't need a type generator (though may want to keep it
|
||||||
around as a compatibility aid for older code) because, due to the
|
around as a compatibility aid for older code) because, due to the
|
||||||
use of the Curiously Recurring Template Pattern (CRTP) <a class="citation-reference" href="#cop95" id="id21" name="id21">[Cop95]</a>,
|
use of the Curiously Recurring Template Pattern (CRTP) <a class="citation-reference" href="#cop95" id="id21" name="id21">[Cop95]</a>,
|
||||||
you can now define the iterator class yourself and acquire
|
you can now define the iterator class yourself and acquire
|
||||||
functionality through inheritance from <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> or
|
functionality through inheritance from <tt class="literal"><span class="pre">iterator_facade</span></tt> or
|
||||||
<tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt>. As a result, you also get much finer control
|
<tt class="literal"><span class="pre">iterator_adaptor</span></tt>. As a result, you also get much finer control
|
||||||
over how your iterator works: you can add additional constructors,
|
over how your iterator works: you can add additional constructors,
|
||||||
or even override the iterator functionality provided by the
|
or even override the iterator functionality provided by the
|
||||||
library.</p>
|
library.</p>
|
||||||
<p>If you're looking for the old <tt class="docutils literal"><span class="pre">projection_iterator</span></tt> component,
|
<p>If you're looking for the old <tt class="literal"><span class="pre">projection_iterator</span></tt> component,
|
||||||
its functionality has been merged into <tt class="docutils literal"><span class="pre">transform_iterator</span></tt>: as
|
its functionality has been merged into <tt class="literal"><span class="pre">transform_iterator</span></tt>: as
|
||||||
long as the function object's <tt class="docutils literal"><span class="pre">result_type</span></tt> (or the <tt class="docutils literal"><span class="pre">Reference</span></tt>
|
long as the function object's <tt class="literal"><span class="pre">result_type</span></tt> (or the <tt class="literal"><span class="pre">Reference</span></tt>
|
||||||
template argument, if explicitly specified) is a true reference
|
template argument, if explicitly specified) is a true reference
|
||||||
type, <tt class="docutils literal"><span class="pre">transform_iterator</span></tt> will behave like
|
type, <tt class="literal"><span class="pre">transform_iterator</span></tt> will behave like
|
||||||
<tt class="docutils literal"><span class="pre">projection_iterator</span></tt> used to.</p>
|
<tt class="literal"><span class="pre">projection_iterator</span></tt> used to.</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="history">
|
||||||
<h1><a class="toc-backref" href="#id29" id="history" name="history">History</a></h1>
|
<h1><a class="toc-backref" href="#id29" name="history">History</a></h1>
|
||||||
<p>In 2000 Dave Abrahams was writing an iterator for a container of
|
<p>In 2000 Dave Abrahams was writing an iterator for a container of
|
||||||
pointers, which would access the pointed-to elements when
|
pointers, which would access the pointed-to elements when
|
||||||
dereferenced. Naturally, being a library writer, he decided to
|
dereferenced. Naturally, being a library writer, he decided to
|
||||||
@ -497,11 +212,11 @@ policies into the iterator class itself. Thomas Witt expressed
|
|||||||
interest and became the voice of strict compile-time checking for
|
interest and became the voice of strict compile-time checking for
|
||||||
the project, adding uses of the SFINAE technique to eliminate false
|
the project, adding uses of the SFINAE technique to eliminate false
|
||||||
converting constructors and operators from the overload set. He
|
converting constructors and operators from the overload set. He
|
||||||
also recognized the need for a separate <tt class="docutils literal"><span class="pre">iterator_facade</span></tt>, and
|
also recognized the need for a separate <tt class="literal"><span class="pre">iterator_facade</span></tt>, and
|
||||||
factored it out of <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt>. Finally, after a
|
factored it out of <tt class="literal"><span class="pre">iterator_adaptor</span></tt>. Finally, after a
|
||||||
near-complete rewrite of the prototype, they came up with the
|
near-complete rewrite of the prototype, they came up with the
|
||||||
library you see today.</p>
|
library you see today.</p>
|
||||||
<table class="docutils citation" frame="void" id="cop95" rules="none">
|
<table class="citation" frame="void" id="cop95" rules="none">
|
||||||
<colgroup><col class="label" /><col /></colgroup>
|
<colgroup><col class="label" /><col /></colgroup>
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr><td class="label"><a class="fn-backref" href="#id21" name="cop95">[Cop95]</a></td><td>[Coplien, 1995] Coplien, J., Curiously Recurring Template
|
<tr><td class="label"><a class="fn-backref" href="#id21" name="cop95">[Cop95]</a></td><td>[Coplien, 1995] Coplien, J., Curiously Recurring Template
|
||||||
@ -517,5 +232,10 @@ LocalWords: incrementable xxx min prev inplace png oldeqnew AccessTag struct
|
|||||||
LocalWords: TraversalTag typename lvalues DWA Hmm JGS -->
|
LocalWords: TraversalTag typename lvalues DWA Hmm JGS -->
|
||||||
</div>
|
</div>
|
||||||
</div>
|
</div>
|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="index.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
</div>
|
||||||
</body>
|
</body>
|
||||||
</html>
|
</html>
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
+++++++++++++++++++++++++++++++++++++++++++++++++
|
+++++++++++++++++++++++++++++++++++++++++++++++++
|
||||||
The Boost.Iterator Library |(logo)|__
|
The Boost.Iterator Library |(logo)|__
|
||||||
+++++++++++++++++++++++++++++++++++++++++++++++++
|
+++++++++++++++++++++++++++++++++++++++++++++++++
|
||||||
|
|||||||
@ -3,298 +3,15 @@
|
|||||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||||||
<head>
|
<head>
|
||||||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
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<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
|
||||||
<title>Indirect Iterator</title>
|
<title>Indirect Iterator</title>
|
||||||
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
|
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
|
||||||
<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab, University of Hanover Institute for Transport Railway Operation and Construction" />
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</style>
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|
||||||
</head>
|
</head>
|
||||||
<body>
|
<body>
|
||||||
<div class="document" id="indirect-iterator">
|
|
||||||
<h1 class="title">Indirect Iterator</h1>
|
<h1 class="title">Indirect Iterator</h1>
|
||||||
<table class="docinfo" frame="void" rules="none">
|
<table class="docinfo" frame="void" rules="none">
|
||||||
<col class="docinfo-name" />
|
<col class="docinfo-name" />
|
||||||
@ -314,42 +31,34 @@ Railway Operation and Construction</a></td></tr>
|
|||||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<!-- Distributed under the Boost -->
|
<div class="document" id="indirect-iterator">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<table class="field-list" frame="void" rules="none">
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><tt class="literal"><span class="pre">indirect_iterator</span></tt> adapts an iterator by applying an
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<em>extra</em> dereference inside of <tt class="literal"><span class="pre">operator*()</span></tt>. For example, this
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> adapts an iterator by applying an
|
|
||||||
<em>extra</em> dereference inside of <tt class="docutils literal"><span class="pre">operator*()</span></tt>. For example, this
|
|
||||||
iterator adaptor makes it possible to view a container of pointers
|
iterator adaptor makes it possible to view a container of pointers
|
||||||
(e.g. <tt class="docutils literal"><span class="pre">list<foo*></span></tt>) as if it were a container of the pointed-to type
|
(e.g. <tt class="literal"><span class="pre">list<foo*></span></tt>) as if it were a container of the pointed-to type
|
||||||
(e.g. <tt class="docutils literal"><span class="pre">list<foo></span></tt>). <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> depends on two
|
(e.g. <tt class="literal"><span class="pre">list<foo></span></tt>). <tt class="literal"><span class="pre">indirect_iterator</span></tt> depends on two
|
||||||
auxiliary traits, <tt class="docutils literal"><span class="pre">pointee</span></tt> and <tt class="docutils literal"><span class="pre">indirect_reference</span></tt>, to
|
auxiliary traits, <tt class="literal"><span class="pre">pointee</span></tt> and <tt class="literal"><span class="pre">indirect_reference</span></tt>, to
|
||||||
provide support for underlying iterators whose <tt class="docutils literal"><span class="pre">value_type</span></tt> is
|
provide support for underlying iterators whose <tt class="literal"><span class="pre">value_type</span></tt> is
|
||||||
not an iterator.</td>
|
not an iterator.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<div class="contents topic">
|
<div class="contents topic" id="table-of-contents">
|
||||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
<li><a class="reference" href="#indirect-iterator-synopsis" id="id2" name="id2"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> synopsis</a></li>
|
<li><a class="reference" href="#indirect-iterator-synopsis" id="id2" name="id2"><tt class="literal"><span class="pre">indirect_iterator</span></tt> synopsis</a></li>
|
||||||
<li><a class="reference" href="#indirect-iterator-requirements" id="id3" name="id3"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> requirements</a></li>
|
<li><a class="reference" href="#indirect-iterator-requirements" id="id3" name="id3"><tt class="literal"><span class="pre">indirect_iterator</span></tt> requirements</a></li>
|
||||||
<li><a class="reference" href="#indirect-iterator-models" id="id4" name="id4"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> models</a></li>
|
<li><a class="reference" href="#indirect-iterator-models" id="id4" name="id4"><tt class="literal"><span class="pre">indirect_iterator</span></tt> models</a></li>
|
||||||
<li><a class="reference" href="#indirect-iterator-operations" id="id5" name="id5"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> operations</a></li>
|
<li><a class="reference" href="#indirect-iterator-operations" id="id5" name="id5"><tt class="literal"><span class="pre">indirect_iterator</span></tt> operations</a></li>
|
||||||
<li><a class="reference" href="#example" id="id6" name="id6">Example</a></li>
|
<li><a class="reference" href="#example" id="id6" name="id6">Example</a></li>
|
||||||
</ul>
|
</ul>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="indirect-iterator-synopsis">
|
||||||
<h1><a class="toc-backref" href="#id2" id="indirect-iterator-synopsis" name="indirect-iterator-synopsis"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> synopsis</a></h1>
|
<h1><a class="toc-backref" href="#id2" name="indirect-iterator-synopsis"><tt class="literal"><span class="pre">indirect_iterator</span></tt> synopsis</a></h1>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
template <
|
template <
|
||||||
class Iterator
|
class Iterator
|
||||||
@ -389,9 +98,9 @@ private:
|
|||||||
Iterator m_iterator; // exposition
|
Iterator m_iterator; // exposition
|
||||||
};
|
};
|
||||||
</pre>
|
</pre>
|
||||||
<p>The member types of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> are defined according to
|
<p>The member types of <tt class="literal"><span class="pre">indirect_iterator</span></tt> are defined according to
|
||||||
the following pseudo-code, where <tt class="docutils literal"><span class="pre">V</span></tt> is
|
the following pseudo-code, where <tt class="literal"><span class="pre">V</span></tt> is
|
||||||
<tt class="docutils literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt></p>
|
<tt class="literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt></p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
if (Value is use_default) then
|
if (Value is use_default) then
|
||||||
typedef remove_const<pointee<V>::type>::type value_type;
|
typedef remove_const<pointee<V>::type>::type value_type;
|
||||||
@ -426,65 +135,65 @@ else
|
|||||||
) iterator_category;
|
) iterator_category;
|
||||||
</pre>
|
</pre>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="indirect-iterator-requirements">
|
||||||
<h1><a class="toc-backref" href="#id3" id="indirect-iterator-requirements" name="indirect-iterator-requirements"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> requirements</a></h1>
|
<h1><a class="toc-backref" href="#id3" name="indirect-iterator-requirements"><tt class="literal"><span class="pre">indirect_iterator</span></tt> requirements</a></h1>
|
||||||
<p>The expression <tt class="docutils literal"><span class="pre">*v</span></tt>, where <tt class="docutils literal"><span class="pre">v</span></tt> is an object of
|
<p>The expression <tt class="literal"><span class="pre">*v</span></tt>, where <tt class="literal"><span class="pre">v</span></tt> is an object of
|
||||||
<tt class="docutils literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>, shall be valid
|
<tt class="literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>, shall be valid
|
||||||
expression and convertible to <tt class="docutils literal"><span class="pre">reference</span></tt>. <tt class="docutils literal"><span class="pre">Iterator</span></tt> shall
|
expression and convertible to <tt class="literal"><span class="pre">reference</span></tt>. <tt class="literal"><span class="pre">Iterator</span></tt> shall
|
||||||
model the traversal concept indicated by <tt class="docutils literal"><span class="pre">iterator_category</span></tt>.
|
model the traversal concept indicated by <tt class="literal"><span class="pre">iterator_category</span></tt>.
|
||||||
<tt class="docutils literal"><span class="pre">Value</span></tt>, <tt class="docutils literal"><span class="pre">Reference</span></tt>, and <tt class="docutils literal"><span class="pre">Difference</span></tt> shall be chosen so
|
<tt class="literal"><span class="pre">Value</span></tt>, <tt class="literal"><span class="pre">Reference</span></tt>, and <tt class="literal"><span class="pre">Difference</span></tt> shall be chosen so
|
||||||
that <tt class="docutils literal"><span class="pre">value_type</span></tt>, <tt class="docutils literal"><span class="pre">reference</span></tt>, and <tt class="docutils literal"><span class="pre">difference_type</span></tt> meet
|
that <tt class="literal"><span class="pre">value_type</span></tt>, <tt class="literal"><span class="pre">reference</span></tt>, and <tt class="literal"><span class="pre">difference_type</span></tt> meet
|
||||||
the requirements indicated by <tt class="docutils literal"><span class="pre">iterator_category</span></tt>.</p>
|
the requirements indicated by <tt class="literal"><span class="pre">iterator_category</span></tt>.</p>
|
||||||
<p>[Note: there are further requirements on the
|
<p>[Note: there are further requirements on the
|
||||||
<tt class="docutils literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt> if the <tt class="docutils literal"><span class="pre">Value</span></tt>
|
<tt class="literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt> if the <tt class="literal"><span class="pre">Value</span></tt>
|
||||||
parameter is not <tt class="docutils literal"><span class="pre">use_default</span></tt>, as implied by the algorithm for
|
parameter is not <tt class="literal"><span class="pre">use_default</span></tt>, as implied by the algorithm for
|
||||||
deducing the default for the <tt class="docutils literal"><span class="pre">value_type</span></tt> member.]</p>
|
deducing the default for the <tt class="literal"><span class="pre">value_type</span></tt> member.]</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="indirect-iterator-models">
|
||||||
<h1><a class="toc-backref" href="#id4" id="indirect-iterator-models" name="indirect-iterator-models"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> models</a></h1>
|
<h1><a class="toc-backref" href="#id4" name="indirect-iterator-models"><tt class="literal"><span class="pre">indirect_iterator</span></tt> models</a></h1>
|
||||||
<p>In addition to the concepts indicated by <tt class="docutils literal"><span class="pre">iterator_category</span></tt>
|
<p>In addition to the concepts indicated by <tt class="literal"><span class="pre">iterator_category</span></tt>
|
||||||
and by <tt class="docutils literal"><span class="pre">iterator_traversal<indirect_iterator>::type</span></tt>, a
|
and by <tt class="literal"><span class="pre">iterator_traversal<indirect_iterator>::type</span></tt>, a
|
||||||
specialization of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> models the following
|
specialization of <tt class="literal"><span class="pre">indirect_iterator</span></tt> models the following
|
||||||
concepts, Where <tt class="docutils literal"><span class="pre">v</span></tt> is an object of
|
concepts, Where <tt class="literal"><span class="pre">v</span></tt> is an object of
|
||||||
<tt class="docutils literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>:</p>
|
<tt class="literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>:</p>
|
||||||
<blockquote>
|
<blockquote>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
<li>Readable Iterator if <tt class="docutils literal"><span class="pre">reference(*v)</span></tt> is convertible to
|
<li>Readable Iterator if <tt class="literal"><span class="pre">reference(*v)</span></tt> is convertible to
|
||||||
<tt class="docutils literal"><span class="pre">value_type</span></tt>.</li>
|
<tt class="literal"><span class="pre">value_type</span></tt>.</li>
|
||||||
<li>Writable Iterator if <tt class="docutils literal"><span class="pre">reference(*v)</span> <span class="pre">=</span> <span class="pre">t</span></tt> is a valid
|
<li>Writable Iterator if <tt class="literal"><span class="pre">reference(*v)</span> <span class="pre">=</span> <span class="pre">t</span></tt> is a valid
|
||||||
expression (where <tt class="docutils literal"><span class="pre">t</span></tt> is an object of type
|
expression (where <tt class="literal"><span class="pre">t</span></tt> is an object of type
|
||||||
<tt class="docutils literal"><span class="pre">indirect_iterator::value_type</span></tt>)</li>
|
<tt class="literal"><span class="pre">indirect_iterator::value_type</span></tt>)</li>
|
||||||
<li>Lvalue Iterator if <tt class="docutils literal"><span class="pre">reference</span></tt> is a reference type.</li>
|
<li>Lvalue Iterator if <tt class="literal"><span class="pre">reference</span></tt> is a reference type.</li>
|
||||||
</ul>
|
</ul>
|
||||||
</blockquote>
|
</blockquote>
|
||||||
<p><tt class="docutils literal"><span class="pre">indirect_iterator<X,V1,C1,R1,D1></span></tt> is interoperable with
|
<p><tt class="literal"><span class="pre">indirect_iterator<X,V1,C1,R1,D1></span></tt> is interoperable with
|
||||||
<tt class="docutils literal"><span class="pre">indirect_iterator<Y,V2,C2,R2,D2></span></tt> if and only if <tt class="docutils literal"><span class="pre">X</span></tt> is
|
<tt class="literal"><span class="pre">indirect_iterator<Y,V2,C2,R2,D2></span></tt> if and only if <tt class="literal"><span class="pre">X</span></tt> is
|
||||||
interoperable with <tt class="docutils literal"><span class="pre">Y</span></tt>.</p>
|
interoperable with <tt class="literal"><span class="pre">Y</span></tt>.</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="indirect-iterator-operations">
|
||||||
<h1><a class="toc-backref" href="#id5" id="indirect-iterator-operations" name="indirect-iterator-operations"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> operations</a></h1>
|
<h1><a class="toc-backref" href="#id5" name="indirect-iterator-operations"><tt class="literal"><span class="pre">indirect_iterator</span></tt> operations</a></h1>
|
||||||
<p>In addition to the operations required by the concepts described
|
<p>In addition to the operations required by the concepts described
|
||||||
above, specializations of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> provide the
|
above, specializations of <tt class="literal"><span class="pre">indirect_iterator</span></tt> provide the
|
||||||
following operations.</p>
|
following operations.</p>
|
||||||
<p><tt class="docutils literal"><span class="pre">indirect_iterator();</span></tt></p>
|
<p><tt class="literal"><span class="pre">indirect_iterator();</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="docutils literal"><span class="pre">Iterator</span></tt> must be Default Constructible.</td>
|
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="literal"><span class="pre">Iterator</span></tt> must be Default Constructible.</td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> with
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="literal"><span class="pre">indirect_iterator</span></tt> with
|
||||||
a default-constructed <tt class="docutils literal"><span class="pre">m_iterator</span></tt>.</td>
|
a default-constructed <tt class="literal"><span class="pre">m_iterator</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">indirect_iterator(Iterator</span> <span class="pre">x);</span></tt></p>
|
<p><tt class="literal"><span class="pre">indirect_iterator(Iterator</span> <span class="pre">x);</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> with
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="literal"><span class="pre">indirect_iterator</span></tt> with
|
||||||
<tt class="docutils literal"><span class="pre">m_iterator</span></tt> copy constructed from <tt class="docutils literal"><span class="pre">x</span></tt>.</td>
|
<tt class="literal"><span class="pre">m_iterator</span></tt> copy constructed from <tt class="literal"><span class="pre">x</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
@ -500,71 +209,68 @@ indirect_iterator(
|
|||||||
, typename enable_if_convertible<Iterator2, Iterator>::type* = 0 // exposition
|
, typename enable_if_convertible<Iterator2, Iterator>::type* = 0 // exposition
|
||||||
);
|
);
|
||||||
</pre>
|
</pre>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="docutils literal"><span class="pre">Iterator2</span></tt> is implicitly convertible to <tt class="docutils literal"><span class="pre">Iterator</span></tt>.</td>
|
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="literal"><span class="pre">Iterator2</span></tt> is implicitly convertible to <tt class="literal"><span class="pre">Iterator</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> whose
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="literal"><span class="pre">indirect_iterator</span></tt> whose
|
||||||
<tt class="docutils literal"><span class="pre">m_iterator</span></tt> subobject is constructed from <tt class="docutils literal"><span class="pre">y.base()</span></tt>.</td>
|
<tt class="literal"><span class="pre">m_iterator</span></tt> subobject is constructed from <tt class="literal"><span class="pre">y.base()</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">Iterator</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
<p><tt class="literal"><span class="pre">Iterator</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">m_iterator</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_iterator</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">reference</span> <span class="pre">operator*()</span> <span class="pre">const;</span></tt></p>
|
<p><tt class="literal"><span class="pre">reference</span> <span class="pre">operator*()</span> <span class="pre">const;</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">**m_iterator</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">**m_iterator</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">indirect_iterator&</span> <span class="pre">operator++();</span></tt></p>
|
<p><tt class="literal"><span class="pre">indirect_iterator&</span> <span class="pre">operator++();</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="docutils literal"><span class="pre">++m_iterator</span></tt></td>
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="literal"><span class="pre">++m_iterator</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">*this</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*this</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">indirect_iterator&</span> <span class="pre">operator--();</span></tt></p>
|
<p><tt class="literal"><span class="pre">indirect_iterator&</span> <span class="pre">operator--();</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="docutils literal"><span class="pre">--m_iterator</span></tt></td>
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="literal"><span class="pre">--m_iterator</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">*this</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*this</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="example">
|
||||||
<h1><a class="toc-backref" href="#id6" id="example" name="example">Example</a></h1>
|
<h1><a class="toc-backref" href="#id6" name="example">Example</a></h1>
|
||||||
<p>This example prints an array of characters, using
|
<p>This example prints an array of characters, using
|
||||||
<tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> to access the array of characters through an
|
<tt class="literal"><span class="pre">indirect_iterator</span></tt> to access the array of characters through an
|
||||||
array of pointers. Next <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> is used with the
|
array of pointers. Next <tt class="literal"><span class="pre">indirect_iterator</span></tt> is used with the
|
||||||
<tt class="docutils literal"><span class="pre">transform</span></tt> algorithm to copy the characters (incremented by one) to
|
<tt class="literal"><span class="pre">transform</span></tt> algorithm to copy the characters (incremented by one) to
|
||||||
another array. A constant indirect iterator is used for the source and
|
another array. A constant indirect iterator is used for the source and
|
||||||
a mutable indirect iterator is used for the destination. The last part
|
a mutable indirect iterator is used for the destination. The last part
|
||||||
of the example prints the original array of characters, but this time
|
of the example prints the original array of characters, but this time
|
||||||
using the <tt class="docutils literal"><span class="pre">make_indirect_iterator</span></tt> helper function.</p>
|
using the <tt class="literal"><span class="pre">make_indirect_iterator</span></tt> helper function.</p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
char characters[] = "abcdefg";
|
char characters[] = "abcdefg";
|
||||||
const int N = sizeof(characters)/sizeof(char) - 1; // -1 since characters has a null char
|
const int N = sizeof(characters)/sizeof(char) - 1; // -1 since characters has a null char
|
||||||
@ -617,5 +323,10 @@ a,b,c,d,e,f,g,
|
|||||||
<p>The source code for this example can be found <a class="reference" href="../example/indirect_iterator_example.cpp">here</a>.</p>
|
<p>The source code for this example can be found <a class="reference" href="../example/indirect_iterator_example.cpp">here</a>.</p>
|
||||||
</div>
|
</div>
|
||||||
</div>
|
</div>
|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="indirect_iterator.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
</div>
|
||||||
</body>
|
</body>
|
||||||
</html>
|
</html>
|
||||||
|
|||||||
Binary file not shown.
@ -1,7 +1,3 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
+++++++++++++++++++
|
+++++++++++++++++++
|
||||||
Indirect Iterator
|
Indirect Iterator
|
||||||
+++++++++++++++++++
|
+++++++++++++++++++
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
``indirect_iterator`` adapts an iterator by applying an
|
``indirect_iterator`` adapts an iterator by applying an
|
||||||
*extra* dereference inside of ``operator*()``. For example, this
|
*extra* dereference inside of ``operator*()``. For example, this
|
||||||
iterator adaptor makes it possible to view a container of pointers
|
iterator adaptor makes it possible to view a container of pointers
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
Example
|
Example
|
||||||
.......
|
.......
|
||||||
|
|
||||||
|
|||||||
245
doc/indirect_iterator_ref.diff
Normal file
245
doc/indirect_iterator_ref.diff
Normal file
@ -0,0 +1,245 @@
|
|||||||
|
Index: indirect_iterator_ref.rst
|
||||||
|
===================================================================
|
||||||
|
RCS file: /cvsroot/boost/boost/libs/iterator/doc/indirect_iterator_ref.rst,v
|
||||||
|
retrieving revision 1.2
|
||||||
|
retrieving revision 1.21
|
||||||
|
diff -w -d -u -b -r1.2 -r1.21
|
||||||
|
--- indirect_iterator_ref.rst 22 Sep 2003 19:55:00 -0000 1.2
|
||||||
|
+++ indirect_iterator_ref.rst 15 Jan 2004 00:01:33 -0000 1.21
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
@@ -3,82 +3,139 @@
|
||||||
|
template <
|
||||||
|
class Iterator
|
||||||
|
, class Value = use_default
|
||||||
|
|
||||||
|
Issue 9.15
|
||||||
|
|
||||||
|
- , unsigned Access = use_default_access
|
||||||
|
- , class Traversal = use_default
|
||||||
|
+ , class CategoryOrTraversal = use_default
|
||||||
|
, class Reference = use_default
|
||||||
|
, class Difference = use_default
|
||||||
|
>
|
||||||
|
class indirect_iterator
|
||||||
|
|
||||||
|
Issue 9.37x
|
||||||
|
|
||||||
|
- : public iterator_adaptor</* see discussion */>
|
||||||
|
{
|
||||||
|
- friend class iterator_core_access;
|
||||||
|
public:
|
||||||
|
+ typedef /* see below */ value_type;
|
||||||
|
+ typedef /* see below */ reference;
|
||||||
|
+ typedef /* see below */ pointer;
|
||||||
|
+ typedef /* see below */ difference_type;
|
||||||
|
+ typedef /* see below */ iterator_category;
|
||||||
|
+
|
||||||
|
indirect_iterator();
|
||||||
|
indirect_iterator(Iterator x);
|
||||||
|
+
|
||||||
|
|
||||||
|
Issue 9.15
|
||||||
|
|
||||||
|
template <
|
||||||
|
- class Iterator2, class Value2, unsigned Access2, class Traversal2
|
||||||
|
+ class Iterator2, class Value2, class Category2
|
||||||
|
, class Reference2, class Difference2
|
||||||
|
>
|
||||||
|
indirect_iterator(
|
||||||
|
indirect_iterator<
|
||||||
|
- Iterator2, Value2, Access2, Traversal2, Reference2, Difference2
|
||||||
|
+ Iterator2, Value2, Category2, Reference2, Difference2
|
||||||
|
> const& y
|
||||||
|
, typename enable_if_convertible<Iterator2, Iterator>::type* = 0 // exposition
|
||||||
|
);
|
||||||
|
|
||||||
|
Issue 9.37x
|
||||||
|
|
||||||
|
- private: // as-if specification
|
||||||
|
- typename indirect_iterator::reference dereference() const
|
||||||
|
- {
|
||||||
|
- return **this->base();
|
||||||
|
- }
|
||||||
|
+
|
||||||
|
+ Iterator const& base() const;
|
||||||
|
+ reference operator*() const;
|
||||||
|
+ indirect_iterator& operator++();
|
||||||
|
+ indirect_iterator& operator--();
|
||||||
|
+ private:
|
||||||
|
+ Iterator m_iterator; // exposition
|
||||||
|
};
|
||||||
|
|
||||||
|
+
|
||||||
|
+The member types of ``indirect_iterator`` are defined according to
|
||||||
|
+the following pseudo-code, where ``V`` is
|
||||||
|
+``iterator_traits<Iterator>::value_type``
|
||||||
|
+
|
||||||
|
+.. parsed-literal::
|
||||||
|
+
|
||||||
|
+ if (Value is use_default) then
|
||||||
|
+ typedef remove_const<pointee<V>::type>::type value_type;
|
||||||
|
+ else
|
||||||
|
+ typedef remove_const<Value>::type value_type;
|
||||||
|
+
|
||||||
|
+ if (Reference is use_default) then
|
||||||
|
+ if (Value is use_default) then
|
||||||
|
+ typedef indirect_reference<V>::type reference;
|
||||||
|
+ else
|
||||||
|
+ typedef Value& reference;
|
||||||
|
+ else
|
||||||
|
+ typedef Reference reference;
|
||||||
|
+
|
||||||
|
+ if (Value is use_default) then
|
||||||
|
+ typedef pointee<V>::type\* pointer;
|
||||||
|
+ else
|
||||||
|
+ typedef Value\* pointer;
|
||||||
|
+
|
||||||
|
+ if (Difference is use_default)
|
||||||
|
+ typedef iterator_traits<Iterator>::difference_type difference_type;
|
||||||
|
+ else
|
||||||
|
+ typedef Difference difference_type;
|
||||||
|
+
|
||||||
|
+ if (CategoryOrTraversal is use_default)
|
||||||
|
+ typedef |iterator-category|_\ (
|
||||||
|
+ iterator_traversal<Iterator>::type,``reference``,``value_type``
|
||||||
|
+ ) iterator_category;
|
||||||
|
+ else
|
||||||
|
+ typedef |iterator-category|_\ (
|
||||||
|
+ CategoryOrTraversal,``reference``,``value_type``
|
||||||
|
+ ) iterator_category;
|
||||||
|
+
|
||||||
|
+
|
||||||
|
|
||||||
|
``indirect_iterator`` requirements
|
||||||
|
..................................
|
||||||
|
|
||||||
|
Issue 9.40x
|
||||||
|
|
||||||
|
-The ``value_type`` of the ``Iterator`` template parameter should
|
||||||
|
-itself be dereferenceable. The return type of the ``operator*`` for
|
||||||
|
-the ``value_type`` must be the same type as the ``Reference`` template
|
||||||
|
-parameter. The ``Value`` template parameter will be the ``value_type``
|
||||||
|
-for the ``indirect_iterator``, unless ``Value`` is const. If ``Value``
|
||||||
|
-is ``const X``, then ``value_type`` will be *non-* ``const X``. The
|
||||||
|
-default for ``Value`` is
|
||||||
|
+The expression ``*v``, where ``v`` is an object of
|
||||||
|
+``iterator_traits<Iterator>::value_type``, shall be valid
|
||||||
|
+expression and convertible to ``reference``. ``Iterator`` shall
|
||||||
|
+model the traversal concept indicated by ``iterator_category``.
|
||||||
|
+``Value``, ``Reference``, and ``Difference`` shall be chosen so
|
||||||
|
+that ``value_type``, ``reference``, and ``difference_type`` meet
|
||||||
|
+the requirements indicated by ``iterator_category``.
|
||||||
|
|
||||||
|
-::
|
||||||
|
+[Note: there are further requirements on the
|
||||||
|
+``iterator_traits<Iterator>::value_type`` if the ``Value``
|
||||||
|
+parameter is not ``use_default``, as implied by the algorithm for
|
||||||
|
+deducing the default for the ``value_type`` member.]
|
||||||
|
|
||||||
|
- iterator_traits< iterator_traits<Iterator>::value_type >::value_type
|
||||||
|
|
||||||
|
Issue 9.37x
|
||||||
|
|
||||||
|
+``indirect_iterator`` models
|
||||||
|
+............................
|
||||||
|
|
||||||
|
-If the default is used for ``Value``, then there must be a valid
|
||||||
|
-specialization of ``iterator_traits`` for the value type of the base
|
||||||
|
-iterator.
|
||||||
|
+In addition to the concepts indicated by ``iterator_category``
|
||||||
|
+and by ``iterator_traversal<indirect_iterator>::type``, a
|
||||||
|
+specialization of ``indirect_iterator`` models the following
|
||||||
|
+concepts, Where ``v`` is an object of
|
||||||
|
+``iterator_traits<Iterator>::value_type``:
|
||||||
|
|
||||||
|
-The ``Reference`` parameter will be the ``reference`` type of the
|
||||||
|
-``indirect_iterator``. The default is ``Value&``.
|
||||||
|
+ * Readable Iterator if ``reference(*v)`` is convertible to
|
||||||
|
+ ``value_type``.
|
||||||
|
|
||||||
|
-The ``Access`` and ``Traversal`` parameters are passed unchanged to
|
||||||
|
-the corresponding parameters of the ``iterator_adaptor`` base
|
||||||
|
-class, and the ``Iterator`` parameter is passed unchanged as the
|
||||||
|
-``Base`` parameter to the ``iterator_adaptor`` base class.
|
||||||
|
+ * Writable Iterator if ``reference(*v) = t`` is a valid
|
||||||
|
+ expression (where ``t`` is an object of type
|
||||||
|
+ ``indirect_iterator::value_type``)
|
||||||
|
|
||||||
|
-The indirect iterator will model the most refined standard traversal
|
||||||
|
-concept that is modeled by the ``Iterator`` type. The indirect
|
||||||
|
-iterator will model the most refined standard access concept that is
|
||||||
|
-modeled by the value type of ``Iterator``.
|
||||||
|
+ * Lvalue Iterator if ``reference`` is a reference type.
|
||||||
|
+
|
||||||
|
+``indirect_iterator<X,V1,C1,R1,D1>`` is interoperable with
|
||||||
|
+``indirect_iterator<Y,V2,C2,R2,D2>`` if and only if ``X`` is
|
||||||
|
+interoperable with ``Y``.
|
||||||
|
|
||||||
|
|
||||||
|
``indirect_iterator`` operations
|
||||||
|
................................
|
||||||
|
|
||||||
|
Issue 9.37x
|
||||||
|
|
||||||
|
+In addition to the operations required by the concepts described
|
||||||
|
+above, specializations of ``indirect_iterator`` provide the
|
||||||
|
+following operations.
|
||||||
|
+
|
||||||
|
+
|
||||||
|
|
||||||
|
Issue 9.28 and 9.37x
|
||||||
|
|
||||||
|
``indirect_iterator();``
|
||||||
|
|
||||||
|
:Requires: ``Iterator`` must be Default Constructible.
|
||||||
|
:Returns: An instance of ``indirect_iterator`` with
|
||||||
|
- a default constructed base object.
|
||||||
|
+ a default-constructed ``m_iterator``.
|
||||||
|
|
||||||
|
|
||||||
|
Issue 9.37x
|
||||||
|
|
||||||
|
``indirect_iterator(Iterator x);``
|
||||||
|
|
||||||
|
:Returns: An instance of ``indirect_iterator`` with
|
||||||
|
- the ``iterator_adaptor`` subobject copy constructed from ``x``.
|
||||||
|
+ ``m_iterator`` copy constructed from ``x``.
|
||||||
|
|
||||||
|
::
|
||||||
|
|
||||||
|
|
||||||
|
Issue 9.29
|
||||||
|
|
||||||
|
@@ -94,5 +151,27 @@
|
||||||
|
);
|
||||||
|
|
||||||
|
:Requires: ``Iterator2`` is implicitly convertible to ``Iterator``.
|
||||||
|
-:Returns: An instance of ``indirect_iterator`` that is a copy of ``y``.
|
||||||
|
+:Returns: An instance of ``indirect_iterator`` whose
|
||||||
|
+ ``m_iterator`` subobject is constructed from ``y.base()``.
|
||||||
|
+
|
||||||
|
|
||||||
|
Issue 9.37x
|
||||||
|
|
||||||
|
+``Iterator const& base() const;``
|
||||||
|
|
||||||
|
+:Returns: ``m_iterator``
|
||||||
|
+
|
||||||
|
+
|
||||||
|
+``reference operator*() const;``
|
||||||
|
+
|
||||||
|
+:Returns: ``**m_iterator``
|
||||||
|
+
|
||||||
|
+
|
||||||
|
+``indirect_iterator& operator++();``
|
||||||
|
+
|
||||||
|
+:Effects: ``++m_iterator``
|
||||||
|
+:Returns: ``*this``
|
||||||
|
+
|
||||||
|
+
|
||||||
|
+``indirect_iterator& operator--();``
|
||||||
|
+
|
||||||
|
+:Effects: ``--m_iterator``
|
||||||
|
+:Returns: ``*this``
|
||||||
220
doc/indirect_iterator_ref.html
Executable file
220
doc/indirect_iterator_ref.html
Executable file
@ -0,0 +1,220 @@
|
|||||||
|
<?xml version="1.0" encoding="utf-8" ?>
|
||||||
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||||||
|
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||||||
|
<head>
|
||||||
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||||||
|
<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
|
||||||
|
<title></title>
|
||||||
|
<link rel="stylesheet" href="default.css" type="text/css" />
|
||||||
|
</head>
|
||||||
|
<body>
|
||||||
|
<div class="document">
|
||||||
|
<pre class="literal-block">
|
||||||
|
template <
|
||||||
|
class Iterator
|
||||||
|
, class Value = use_default
|
||||||
|
, class CategoryOrTraversal = use_default
|
||||||
|
, class Reference = use_default
|
||||||
|
, class Difference = use_default
|
||||||
|
>
|
||||||
|
class indirect_iterator
|
||||||
|
{
|
||||||
|
public:
|
||||||
|
typedef /* see below */ value_type;
|
||||||
|
typedef /* see below */ reference;
|
||||||
|
typedef /* see below */ pointer;
|
||||||
|
typedef /* see below */ difference_type;
|
||||||
|
typedef /* see below */ iterator_category;
|
||||||
|
|
||||||
|
indirect_iterator();
|
||||||
|
indirect_iterator(Iterator x);
|
||||||
|
|
||||||
|
template <
|
||||||
|
class Iterator2, class Value2, class Category2
|
||||||
|
, class Reference2, class Difference2
|
||||||
|
>
|
||||||
|
indirect_iterator(
|
||||||
|
indirect_iterator<
|
||||||
|
Iterator2, Value2, Category2, Reference2, Difference2
|
||||||
|
> const& y
|
||||||
|
, typename enable_if_convertible<Iterator2, Iterator>::type* = 0 // exposition
|
||||||
|
);
|
||||||
|
|
||||||
|
Iterator const& base() const;
|
||||||
|
reference operator*() const;
|
||||||
|
indirect_iterator& operator++();
|
||||||
|
indirect_iterator& operator--();
|
||||||
|
private:
|
||||||
|
Iterator m_iterator; // exposition
|
||||||
|
};
|
||||||
|
</pre>
|
||||||
|
<p>The member types of <tt class="literal"><span class="pre">indirect_iterator</span></tt> are defined according to
|
||||||
|
the following pseudo-code, where <tt class="literal"><span class="pre">V</span></tt> is
|
||||||
|
<tt class="literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt></p>
|
||||||
|
<pre class="literal-block">
|
||||||
|
if (Value is use_default) then
|
||||||
|
typedef remove_const<pointee<V>::type>::type value_type;
|
||||||
|
else
|
||||||
|
typedef remove_const<Value>::type value_type;
|
||||||
|
|
||||||
|
if (Reference is use_default) then
|
||||||
|
if (Value is use_default) then
|
||||||
|
typedef indirect_reference<V>::type reference;
|
||||||
|
else
|
||||||
|
typedef Value& reference;
|
||||||
|
else
|
||||||
|
typedef Reference reference;
|
||||||
|
|
||||||
|
if (Value is use_default) then
|
||||||
|
typedef pointee<V>::type* pointer;
|
||||||
|
else
|
||||||
|
typedef Value* pointer;
|
||||||
|
|
||||||
|
if (Difference is use_default)
|
||||||
|
typedef iterator_traits<Iterator>::difference_type difference_type;
|
||||||
|
else
|
||||||
|
typedef Difference difference_type;
|
||||||
|
|
||||||
|
if (CategoryOrTraversal is use_default)
|
||||||
|
typedef <em>iterator-category</em> (
|
||||||
|
iterator_traversal<Iterator>::type,``reference``,``value_type``
|
||||||
|
) iterator_category;
|
||||||
|
else
|
||||||
|
typedef <em>iterator-category</em> (
|
||||||
|
CategoryOrTraversal,``reference``,``value_type``
|
||||||
|
) iterator_category;
|
||||||
|
</pre>
|
||||||
|
<div class="section" id="indirect-iterator-requirements">
|
||||||
|
<h1><a name="indirect-iterator-requirements"><tt class="literal"><span class="pre">indirect_iterator</span></tt> requirements</a></h1>
|
||||||
|
<p>The expression <tt class="literal"><span class="pre">*v</span></tt>, where <tt class="literal"><span class="pre">v</span></tt> is an object of
|
||||||
|
<tt class="literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>, shall be valid
|
||||||
|
expression and convertible to <tt class="literal"><span class="pre">reference</span></tt>. <tt class="literal"><span class="pre">Iterator</span></tt> shall
|
||||||
|
model the traversal concept indicated by <tt class="literal"><span class="pre">iterator_category</span></tt>.
|
||||||
|
<tt class="literal"><span class="pre">Value</span></tt>, <tt class="literal"><span class="pre">Reference</span></tt>, and <tt class="literal"><span class="pre">Difference</span></tt> shall be chosen so
|
||||||
|
that <tt class="literal"><span class="pre">value_type</span></tt>, <tt class="literal"><span class="pre">reference</span></tt>, and <tt class="literal"><span class="pre">difference_type</span></tt> meet
|
||||||
|
the requirements indicated by <tt class="literal"><span class="pre">iterator_category</span></tt>.</p>
|
||||||
|
<p>[Note: there are further requirements on the
|
||||||
|
<tt class="literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt> if the <tt class="literal"><span class="pre">Value</span></tt>
|
||||||
|
parameter is not <tt class="literal"><span class="pre">use_default</span></tt>, as implied by the algorithm for
|
||||||
|
deducing the default for the <tt class="literal"><span class="pre">value_type</span></tt> member.]</p>
|
||||||
|
</div>
|
||||||
|
<div class="section" id="indirect-iterator-models">
|
||||||
|
<h1><a name="indirect-iterator-models"><tt class="literal"><span class="pre">indirect_iterator</span></tt> models</a></h1>
|
||||||
|
<p>In addition to the concepts indicated by <tt class="literal"><span class="pre">iterator_category</span></tt>
|
||||||
|
and by <tt class="literal"><span class="pre">iterator_traversal<indirect_iterator>::type</span></tt>, a
|
||||||
|
specialization of <tt class="literal"><span class="pre">indirect_iterator</span></tt> models the following
|
||||||
|
concepts, Where <tt class="literal"><span class="pre">v</span></tt> is an object of
|
||||||
|
<tt class="literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>:</p>
|
||||||
|
<blockquote>
|
||||||
|
<ul class="simple">
|
||||||
|
<li>Readable Iterator if <tt class="literal"><span class="pre">reference(*v)</span></tt> is convertible to
|
||||||
|
<tt class="literal"><span class="pre">value_type</span></tt>.</li>
|
||||||
|
<li>Writable Iterator if <tt class="literal"><span class="pre">reference(*v)</span> <span class="pre">=</span> <span class="pre">t</span></tt> is a valid
|
||||||
|
expression (where <tt class="literal"><span class="pre">t</span></tt> is an object of type
|
||||||
|
<tt class="literal"><span class="pre">indirect_iterator::value_type</span></tt>)</li>
|
||||||
|
<li>Lvalue Iterator if <tt class="literal"><span class="pre">reference</span></tt> is a reference type.</li>
|
||||||
|
</ul>
|
||||||
|
</blockquote>
|
||||||
|
<p><tt class="literal"><span class="pre">indirect_iterator<X,V1,C1,R1,D1></span></tt> is interoperable with
|
||||||
|
<tt class="literal"><span class="pre">indirect_iterator<Y,V2,C2,R2,D2></span></tt> if and only if <tt class="literal"><span class="pre">X</span></tt> is
|
||||||
|
interoperable with <tt class="literal"><span class="pre">Y</span></tt>.</p>
|
||||||
|
</div>
|
||||||
|
<div class="section" id="indirect-iterator-operations">
|
||||||
|
<h1><a name="indirect-iterator-operations"><tt class="literal"><span class="pre">indirect_iterator</span></tt> operations</a></h1>
|
||||||
|
<p>In addition to the operations required by the concepts described
|
||||||
|
above, specializations of <tt class="literal"><span class="pre">indirect_iterator</span></tt> provide the
|
||||||
|
following operations.</p>
|
||||||
|
<p><tt class="literal"><span class="pre">indirect_iterator();</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="literal"><span class="pre">Iterator</span></tt> must be Default Constructible.</td>
|
||||||
|
</tr>
|
||||||
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="literal"><span class="pre">indirect_iterator</span></tt> with
|
||||||
|
a default-constructed <tt class="literal"><span class="pre">m_iterator</span></tt>.</td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">indirect_iterator(Iterator</span> <span class="pre">x);</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="literal"><span class="pre">indirect_iterator</span></tt> with
|
||||||
|
<tt class="literal"><span class="pre">m_iterator</span></tt> copy constructed from <tt class="literal"><span class="pre">x</span></tt>.</td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<pre class="literal-block">
|
||||||
|
template <
|
||||||
|
class Iterator2, class Value2, unsigned Access, class Traversal
|
||||||
|
, class Reference2, class Difference2
|
||||||
|
>
|
||||||
|
indirect_iterator(
|
||||||
|
indirect_iterator<
|
||||||
|
Iterator2, Value2, Access, Traversal, Reference2, Difference2
|
||||||
|
> const& y
|
||||||
|
, typename enable_if_convertible<Iterator2, Iterator>::type* = 0 // exposition
|
||||||
|
);
|
||||||
|
</pre>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="literal"><span class="pre">Iterator2</span></tt> is implicitly convertible to <tt class="literal"><span class="pre">Iterator</span></tt>.</td>
|
||||||
|
</tr>
|
||||||
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="literal"><span class="pre">indirect_iterator</span></tt> whose
|
||||||
|
<tt class="literal"><span class="pre">m_iterator</span></tt> subobject is constructed from <tt class="literal"><span class="pre">y.base()</span></tt>.</td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">Iterator</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_iterator</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">reference</span> <span class="pre">operator*()</span> <span class="pre">const;</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">**m_iterator</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">indirect_iterator&</span> <span class="pre">operator++();</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="literal"><span class="pre">++m_iterator</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*this</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">indirect_iterator&</span> <span class="pre">operator--();</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="literal"><span class="pre">--m_iterator</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*this</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
</div>
|
||||||
|
</div>
|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="indirect_iterator_ref.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
</div>
|
||||||
|
</body>
|
||||||
|
</html>
|
||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
::
|
::
|
||||||
|
|
||||||
template <
|
template <
|
||||||
|
|||||||
@ -5,9 +5,6 @@
|
|||||||
:date: $Date$
|
:date: $Date$
|
||||||
:copyright: Copyright Thomas Witt 2004.
|
:copyright: Copyright Thomas Witt 2004.
|
||||||
|
|
||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
Problem
|
Problem
|
||||||
=======
|
=======
|
||||||
@ -70,7 +67,7 @@ Mutable m;
|
|||||||
c == m; // ok, dispatched to Constant::equal_to
|
c == m; // ok, dispatched to Constant::equal_to
|
||||||
m == c; // !! error, dispatched to Mutable::equal_to
|
m == c; // !! error, dispatched to Mutable::equal_to
|
||||||
|
|
||||||
Instead the following "slightly" more complicated implementation is necessary
|
Instead the following "slightly" more complicated implementation is neccessary
|
||||||
|
|
||||||
struct Mutable : Facade<Mutable>
|
struct Mutable : Facade<Mutable>
|
||||||
{
|
{
|
||||||
@ -90,7 +87,7 @@ struct Constant : Tag<Constant>
|
|||||||
|
|
||||||
Beside the fact that the code is significantly more complex to understand and to teach there is
|
Beside the fact that the code is significantly more complex to understand and to teach there is
|
||||||
a major design problem lurking here. Note that in both types equal_to is a function template with
|
a major design problem lurking here. Note that in both types equal_to is a function template with
|
||||||
an unconstrained argument T. This is necessary so that further types can be made interoperable with
|
an unconstrained argument T. This is neccessary so that further types can be made interoperable with
|
||||||
Mutable or Constant. Would Mutable be defined as
|
Mutable or Constant. Would Mutable be defined as
|
||||||
|
|
||||||
struct Mutable : Facade<Mutable>
|
struct Mutable : Facade<Mutable>
|
||||||
|
|||||||
411
doc/issues.html
411
doc/issues.html
@ -3,342 +3,56 @@
|
|||||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||||||
<head>
|
<head>
|
||||||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||||||
<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
|
||||||
<title>Problem with is_writable and is_swappable in N1550</title>
|
<title>Problem with is_writable and is_swappable in N1550</title>
|
||||||
<meta name="author" content="David Abrahams and Jeremy Siek" />
|
<link rel="stylesheet" href="default.css" type="text/css" />
|
||||||
<meta name="organization" content="Boost Consulting, Indiana University Bloomington" />
|
|
||||||
<meta name="date" content="2003-11-19" />
|
|
||||||
<meta name="copyright" content="Copyright David Abrahams, Jeremy Siek 2003. Use, modification and distribution is subject to the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)" />
|
|
||||||
<style type="text/css">
|
|
||||||
|
|
||||||
/*
|
|
||||||
:Author: David Goodger
|
|
||||||
:Contact: goodger@users.sourceforge.net
|
|
||||||
:Date: $Date$
|
|
||||||
:Revision: $Revision$
|
|
||||||
:Copyright: This stylesheet has been placed in the public domain.
|
|
||||||
|
|
||||||
Default cascading style sheet for the HTML output of Docutils.
|
|
||||||
|
|
||||||
See http://docutils.sf.net/docs/howto/html-stylesheets.html for how to
|
|
||||||
customize this style sheet.
|
|
||||||
*/
|
|
||||||
|
|
||||||
/* used to remove borders from tables and images */
|
|
||||||
.borderless, table.borderless td, table.borderless th {
|
|
||||||
border: 0 }
|
|
||||||
|
|
||||||
table.borderless td, table.borderless th {
|
|
||||||
/* Override padding for "table.docutils td" with "! important".
|
|
||||||
The right padding separates the table cells. */
|
|
||||||
padding: 0 0.5em 0 0 ! important }
|
|
||||||
|
|
||||||
.first {
|
|
||||||
/* Override more specific margin styles with "! important". */
|
|
||||||
margin-top: 0 ! important }
|
|
||||||
|
|
||||||
.last, .with-subtitle {
|
|
||||||
margin-bottom: 0 ! important }
|
|
||||||
|
|
||||||
.hidden {
|
|
||||||
display: none }
|
|
||||||
|
|
||||||
a.toc-backref {
|
|
||||||
text-decoration: none ;
|
|
||||||
color: black }
|
|
||||||
|
|
||||||
blockquote.epigraph {
|
|
||||||
margin: 2em 5em ; }
|
|
||||||
|
|
||||||
dl.docutils dd {
|
|
||||||
margin-bottom: 0.5em }
|
|
||||||
|
|
||||||
/* Uncomment (and remove this text!) to get bold-faced definition list terms
|
|
||||||
dl.docutils dt {
|
|
||||||
font-weight: bold }
|
|
||||||
*/
|
|
||||||
|
|
||||||
div.abstract {
|
|
||||||
margin: 2em 5em }
|
|
||||||
|
|
||||||
div.abstract p.topic-title {
|
|
||||||
font-weight: bold ;
|
|
||||||
text-align: center }
|
|
||||||
|
|
||||||
div.admonition, div.attention, div.caution, div.danger, div.error,
|
|
||||||
div.hint, div.important, div.note, div.tip, div.warning {
|
|
||||||
margin: 2em ;
|
|
||||||
border: medium outset ;
|
|
||||||
padding: 1em }
|
|
||||||
|
|
||||||
div.admonition p.admonition-title, div.hint p.admonition-title,
|
|
||||||
div.important p.admonition-title, div.note p.admonition-title,
|
|
||||||
div.tip p.admonition-title {
|
|
||||||
font-weight: bold ;
|
|
||||||
font-family: sans-serif }
|
|
||||||
|
|
||||||
div.attention p.admonition-title, div.caution p.admonition-title,
|
|
||||||
div.danger p.admonition-title, div.error p.admonition-title,
|
|
||||||
div.warning p.admonition-title {
|
|
||||||
color: red ;
|
|
||||||
font-weight: bold ;
|
|
||||||
font-family: sans-serif }
|
|
||||||
|
|
||||||
/* Uncomment (and remove this text!) to get reduced vertical space in
|
|
||||||
compound paragraphs.
|
|
||||||
div.compound .compound-first, div.compound .compound-middle {
|
|
||||||
margin-bottom: 0.5em }
|
|
||||||
|
|
||||||
div.compound .compound-last, div.compound .compound-middle {
|
|
||||||
margin-top: 0.5em }
|
|
||||||
*/
|
|
||||||
|
|
||||||
div.dedication {
|
|
||||||
margin: 2em 5em ;
|
|
||||||
text-align: center ;
|
|
||||||
font-style: italic }
|
|
||||||
|
|
||||||
div.dedication p.topic-title {
|
|
||||||
font-weight: bold ;
|
|
||||||
font-style: normal }
|
|
||||||
|
|
||||||
div.figure {
|
|
||||||
margin-left: 2em ;
|
|
||||||
margin-right: 2em }
|
|
||||||
|
|
||||||
div.footer, div.header {
|
|
||||||
clear: both;
|
|
||||||
font-size: smaller }
|
|
||||||
|
|
||||||
div.line-block {
|
|
||||||
display: block ;
|
|
||||||
margin-top: 1em ;
|
|
||||||
margin-bottom: 1em }
|
|
||||||
|
|
||||||
div.line-block div.line-block {
|
|
||||||
margin-top: 0 ;
|
|
||||||
margin-bottom: 0 ;
|
|
||||||
margin-left: 1.5em }
|
|
||||||
|
|
||||||
div.sidebar {
|
|
||||||
margin-left: 1em ;
|
|
||||||
border: medium outset ;
|
|
||||||
padding: 1em ;
|
|
||||||
background-color: #ffffee ;
|
|
||||||
width: 40% ;
|
|
||||||
float: right ;
|
|
||||||
clear: right }
|
|
||||||
|
|
||||||
div.sidebar p.rubric {
|
|
||||||
font-family: sans-serif ;
|
|
||||||
font-size: medium }
|
|
||||||
|
|
||||||
div.system-messages {
|
|
||||||
margin: 5em }
|
|
||||||
|
|
||||||
div.system-messages h1 {
|
|
||||||
color: red }
|
|
||||||
|
|
||||||
div.system-message {
|
|
||||||
border: medium outset ;
|
|
||||||
padding: 1em }
|
|
||||||
|
|
||||||
div.system-message p.system-message-title {
|
|
||||||
color: red ;
|
|
||||||
font-weight: bold }
|
|
||||||
|
|
||||||
div.topic {
|
|
||||||
margin: 2em }
|
|
||||||
|
|
||||||
h1.section-subtitle, h2.section-subtitle, h3.section-subtitle,
|
|
||||||
h4.section-subtitle, h5.section-subtitle, h6.section-subtitle {
|
|
||||||
margin-top: 0.4em }
|
|
||||||
|
|
||||||
h1.title {
|
|
||||||
text-align: center }
|
|
||||||
|
|
||||||
h2.subtitle {
|
|
||||||
text-align: center }
|
|
||||||
|
|
||||||
hr.docutils {
|
|
||||||
width: 75% }
|
|
||||||
|
|
||||||
img.align-left {
|
|
||||||
clear: left }
|
|
||||||
|
|
||||||
img.align-right {
|
|
||||||
clear: right }
|
|
||||||
|
|
||||||
ol.simple, ul.simple {
|
|
||||||
margin-bottom: 1em }
|
|
||||||
|
|
||||||
ol.arabic {
|
|
||||||
list-style: decimal }
|
|
||||||
|
|
||||||
ol.loweralpha {
|
|
||||||
list-style: lower-alpha }
|
|
||||||
|
|
||||||
ol.upperalpha {
|
|
||||||
list-style: upper-alpha }
|
|
||||||
|
|
||||||
ol.lowerroman {
|
|
||||||
list-style: lower-roman }
|
|
||||||
|
|
||||||
ol.upperroman {
|
|
||||||
list-style: upper-roman }
|
|
||||||
|
|
||||||
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|
|
||||||
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|
||||||
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|
||||||
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|
||||||
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|
||||||
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|
||||||
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|
||||||
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|
||||||
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|
||||||
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|
||||||
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|
||||||
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|
||||||
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|
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|
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|
||||||
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|
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|
||||||
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|
||||||
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|
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|
||||||
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|
||||||
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||||||
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|
||||||
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|
||||||
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|
||||||
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|
||||||
margin-bottom: 0 ;
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|
||||||
margin-top: 0 ;
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|
||||||
font-family: serif ;
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|
||||||
font-size: 100% }
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|
||||||
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|
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|
||||||
margin-left: 2em ;
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|
||||||
margin-right: 2em ;
|
|
||||||
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|
||||||
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|
||||||
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|
|
||||||
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|
|
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|
||||||
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|
||||||
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|
||||||
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|
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|
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||||||
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|
||||||
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|
||||||
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|
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|
||||||
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|
||||||
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|
||||||
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|
||||||
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|
||||||
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|
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/* font-size relative to parent (h1..h6 element) */
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|
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|
||||||
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|
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||||||
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|
||||||
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|
|
||||||
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|
||||||
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|
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|
||||||
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|
||||||
h1 tt.docutils, h2 tt.docutils, h3 tt.docutils,
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h4 tt.docutils, h5 tt.docutils, h6 tt.docutils {
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|
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|
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|
||||||
</style>
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|
||||||
</head>
|
</head>
|
||||||
<body>
|
<body>
|
||||||
|
<h1 class="title">Problem with <tt class="literal"><span class="pre">is_writable</span></tt> and <tt class="literal"><span class="pre">is_swappable</span></tt> in <a class="reference" href="http://www.boost-consulting.com/writing/n1550.html">N1550</a></h1>
|
||||||
<div class="document" id="problem-with-is-writable-and-is-swappable-in-n1550">
|
<div class="document" id="problem-with-is-writable-and-is-swappable-in-n1550">
|
||||||
<h1 class="title">Problem with <tt class="docutils literal"><span class="pre">is_writable</span></tt> and <tt class="docutils literal"><span class="pre">is_swappable</span></tt> in <a class="reference" href="http://www.boost-consulting.com/writing/n1550.html">N1550</a></h1>
|
<table class="field-list" frame="void" rules="none">
|
||||||
<table class="docinfo" frame="void" rules="none">
|
<col class="field-name" />
|
||||||
<col class="docinfo-name" />
|
<col class="field-body" />
|
||||||
<col class="docinfo-content" />
|
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr><th class="docinfo-name">Author:</th>
|
<tr class="field"><th class="field-name">Author:</th><td class="field-body">David Abrahams and Jeremy Siek</td>
|
||||||
<td>David Abrahams and Jeremy Siek</td></tr>
|
</tr>
|
||||||
<tr><th class="docinfo-name">Contact:</th>
|
<tr class="field"><th class="field-name">Contact:</th><td class="field-body"><a class="reference" href="mailto:dave@boost-consulting.com">dave@boost-consulting.com</a>, <a class="reference" href="mailto:jsiek@osl.iu.edu">jsiek@osl.iu.edu</a></td>
|
||||||
<td><a class="first reference" href="mailto:dave@boost-consulting.com">dave@boost-consulting.com</a>, <a class="last reference" href="mailto:jsiek@osl.iu.edu">jsiek@osl.iu.edu</a></td></tr>
|
</tr>
|
||||||
<tr><th class="docinfo-name">Organization:</th>
|
<tr class="field"><th class="field-name">Organization:</th><td class="field-body"><a class="reference" href="http://www.boost-consulting.com">Boost Consulting</a>, Indiana University Bloomington</td>
|
||||||
<td><a class="first reference" href="http://www.boost-consulting.com">Boost Consulting</a>, Indiana University Bloomington</td></tr>
|
</tr>
|
||||||
<tr><th class="docinfo-name">Date:</th>
|
<tr class="field"><th class="field-name">date:</th><td class="field-body">$Date$</td>
|
||||||
<td>2003-11-19</td></tr>
|
</tr>
|
||||||
<tr><th class="docinfo-name">Copyright:</th>
|
<tr class="field"><th class="field-name">Copyright:</th><td class="field-body">Copyright David Abrahams, Jeremy Siek 2003. Use, modification and
|
||||||
<td>Copyright David Abrahams, Jeremy Siek 2003. Use, modification and
|
|
||||||
distribution is subject to the Boost Software License,
|
distribution is subject to the Boost Software License,
|
||||||
Version 1.0. (See accompanying file LICENSE_1_0.txt or copy
|
Version 1.0. (See accompanying file LICENSE_1_0.txt or copy
|
||||||
at <a class="reference" href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</a>)</td></tr>
|
at <a class="reference" href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</a>)</td>
|
||||||
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<div class="contents topic">
|
<div class="contents topic" id="table-of-contents">
|
||||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
<li><a class="reference" href="#introduction" id="id1" name="id1">Introduction</a></li>
|
<li><a class="reference" href="#introduction" id="id1" name="id1">Introduction</a></li>
|
||||||
<li><a class="reference" href="#proposed-resolution" id="id2" name="id2">Proposed Resolution</a></li>
|
<li><a class="reference" href="#proposed-resolution" id="id2" name="id2">Proposed Resolution</a></li>
|
||||||
<li><a class="reference" href="#rationale" id="id3" name="id3">Rationale</a></li>
|
<li><a class="reference" href="#rationale" id="id3" name="id3">Rationale</a></li>
|
||||||
</ul>
|
</ul>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="introduction">
|
||||||
<h1><a class="toc-backref" href="#id1" id="introduction" name="introduction">Introduction</a></h1>
|
<h1><a class="toc-backref" href="#id1" name="introduction">Introduction</a></h1>
|
||||||
<p>The <tt class="docutils literal"><span class="pre">is_writable</span></tt> and <tt class="docutils literal"><span class="pre">is_swappable</span></tt> traits classes in <a class="reference" href="http://www.boost-consulting.com/writing/n1550.html">N1550</a>
|
<p>The <tt class="literal"><span class="pre">is_writable</span></tt> and <tt class="literal"><span class="pre">is_swappable</span></tt> traits classes in <a class="reference" href="http://www.boost-consulting.com/writing/n1550.html">N1550</a>
|
||||||
provide a mechanism for determining at compile time if an iterator
|
provide a mechanism for determining at compile time if an iterator
|
||||||
type is a model of the new Writable Iterator and Swappable Iterator
|
type is a model of the new Writable Iterator and Swappable Iterator
|
||||||
concepts, analogous to <tt class="docutils literal"><span class="pre">iterator_traits<X>::iterator_category</span></tt>
|
concepts, analogous to <tt class="literal"><span class="pre">iterator_traits<X>::iterator_category</span></tt>
|
||||||
for the old iterator concepts. For backward compatibility,
|
for the old iterator concepts. For backward compatibility,
|
||||||
<tt class="docutils literal"><span class="pre">is_writable</span></tt> and <tt class="docutils literal"><span class="pre">is_swappable</span></tt> not only work with new
|
<tt class="literal"><span class="pre">is_writable</span></tt> and <tt class="literal"><span class="pre">is_swappable</span></tt> not only work with new
|
||||||
iterators, but they also are intended to work for old
|
iterators, but they also are intended to work for old
|
||||||
iterators (iterators that meet the requirements for one of the
|
iterators (iterators that meet the requirements for one of the
|
||||||
iterator concepts in the current standard). In the case of old
|
iterator concepts in the current standard). In the case of old
|
||||||
iterators, the writability and swapability is deduced based on the
|
iterators, the writability and swapability is deduced based on the
|
||||||
<tt class="docutils literal"><span class="pre">iterator_category</span></tt> and also the <tt class="docutils literal"><span class="pre">reference</span></tt> type. The
|
<tt class="literal"><span class="pre">iterator_category</span></tt> and also the <tt class="literal"><span class="pre">reference</span></tt> type. The
|
||||||
specification for this deduction gives false positives for forward
|
specification for this deduction gives false positives for forward
|
||||||
iterators that have non-assignable value types.</p>
|
iterators that have non-assignable value types.</p>
|
||||||
<p>To review, the part of the <tt class="docutils literal"><span class="pre">is_writable</span></tt> trait definition which
|
<p>To review, the part of the <tt class="literal"><span class="pre">is_writable</span></tt> trait definition which
|
||||||
applies to old iterators is:</p>
|
applies to old iterators is:</p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
if (cat is convertible to output_iterator_tag)
|
if (cat is convertible to output_iterator_tag)
|
||||||
@ -350,7 +64,7 @@ else if (cat is convertible to forward_iterator_tag
|
|||||||
else
|
else
|
||||||
return false;
|
return false;
|
||||||
</pre>
|
</pre>
|
||||||
<p>Suppose the <tt class="docutils literal"><span class="pre">value_type</span></tt> of the iterator <tt class="docutils literal"><span class="pre">It</span></tt> has a private
|
<p>Suppose the <tt class="literal"><span class="pre">value_type</span></tt> of the iterator <tt class="literal"><span class="pre">It</span></tt> has a private
|
||||||
assignment operator:</p>
|
assignment operator:</p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
class B {
|
class B {
|
||||||
@ -360,31 +74,31 @@ private:
|
|||||||
B& operator=(const B&);
|
B& operator=(const B&);
|
||||||
};
|
};
|
||||||
</pre>
|
</pre>
|
||||||
<p>and suppose the <tt class="docutils literal"><span class="pre">reference</span></tt> type of the iterator is <tt class="docutils literal"><span class="pre">B&</span></tt>. In
|
<p>and suppose the <tt class="literal"><span class="pre">reference</span></tt> type of the iterator is <tt class="literal"><span class="pre">B&</span></tt>. In
|
||||||
that case, <tt class="docutils literal"><span class="pre">is_writable<It>::value</span></tt> will be true when in fact
|
that case, <tt class="literal"><span class="pre">is_writable<It>::value</span></tt> will be true when in fact
|
||||||
attempting to write into <tt class="docutils literal"><span class="pre">B</span></tt> will cause an error.</p>
|
attempting to write into <tt class="literal"><span class="pre">B</span></tt> will cause an error.</p>
|
||||||
<p>The same problem applies to <tt class="docutils literal"><span class="pre">is_swappable</span></tt>.</p>
|
<p>The same problem applies to <tt class="literal"><span class="pre">is_swappable</span></tt>.</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="proposed-resolution">
|
||||||
<h1><a class="toc-backref" href="#id2" id="proposed-resolution" name="proposed-resolution">Proposed Resolution</a></h1>
|
<h1><a class="toc-backref" href="#id2" name="proposed-resolution">Proposed Resolution</a></h1>
|
||||||
<ol class="arabic">
|
<ol class="arabic">
|
||||||
<li><p class="first">Remove the <tt class="docutils literal"><span class="pre">is_writable</span></tt> and <tt class="docutils literal"><span class="pre">is_swappable</span></tt> traits, and remove the
|
<li><p class="first">Remove the <tt class="literal"><span class="pre">is_writable</span></tt> and <tt class="literal"><span class="pre">is_swappable</span></tt> traits, and remove the
|
||||||
requirements in the Writable Iterator and Swappable Iterator concepts
|
requirements in the Writable Iterator and Swappable Iterator concepts
|
||||||
that require their models to support these traits.</p>
|
that require their models to support these traits.</p>
|
||||||
</li>
|
</li>
|
||||||
<li><p class="first">Change the <tt class="docutils literal"><span class="pre">is_readable</span></tt> specification to be:
|
<li><p class="first">Change the <tt class="literal"><span class="pre">is_readable</span></tt> specification to be:
|
||||||
<tt class="docutils literal"><span class="pre">is_readable<X>::type</span></tt> is <tt class="docutils literal"><span class="pre">true_type</span></tt> if the
|
<tt class="literal"><span class="pre">is_readable<X>::type</span></tt> is <tt class="literal"><span class="pre">true_type</span></tt> if the
|
||||||
result type of <tt class="docutils literal"><span class="pre">X::operator*</span></tt> is convertible to
|
result type of <tt class="literal"><span class="pre">X::operator*</span></tt> is convertible to
|
||||||
<tt class="docutils literal"><span class="pre">iterator_traits<X>::value_type</span></tt> and is <tt class="docutils literal"><span class="pre">false_type</span></tt>
|
<tt class="literal"><span class="pre">iterator_traits<X>::value_type</span></tt> and is <tt class="literal"><span class="pre">false_type</span></tt>
|
||||||
otherwise. Also, <tt class="docutils literal"><span class="pre">is_readable</span></tt> is required to satisfy
|
otherwise. Also, <tt class="literal"><span class="pre">is_readable</span></tt> is required to satisfy
|
||||||
the requirements for the UnaryTypeTrait concept
|
the requirements for the UnaryTypeTrait concept
|
||||||
(defined in the type traits proposal).</p>
|
(defined in the type traits proposal).</p>
|
||||||
<p>Remove the requirement for support of the <tt class="docutils literal"><span class="pre">is_readable</span></tt> trait from
|
<p>Remove the requirement for support of the <tt class="literal"><span class="pre">is_readable</span></tt> trait from
|
||||||
the Readable Iterator concept.</p>
|
the Readable Iterator concept.</p>
|
||||||
</li>
|
</li>
|
||||||
<li><p class="first">Remove the <tt class="docutils literal"><span class="pre">iterator_tag</span></tt> class.</p>
|
<li><p class="first">Remove the <tt class="literal"><span class="pre">iterator_tag</span></tt> class.</p>
|
||||||
</li>
|
</li>
|
||||||
<li><p class="first">Change the specification of <tt class="docutils literal"><span class="pre">traversal_category</span></tt> to:</p>
|
<li><p class="first">Change the specification of <tt class="literal"><span class="pre">traversal_category</span></tt> to:</p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
traversal-category(Iterator) =
|
traversal-category(Iterator) =
|
||||||
let cat = iterator_traits<Iterator>::iterator_category
|
let cat = iterator_traits<Iterator>::iterator_category
|
||||||
@ -406,14 +120,14 @@ traversal-category(Iterator) =
|
|||||||
</li>
|
</li>
|
||||||
</ol>
|
</ol>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="rationale">
|
||||||
<h1><a class="toc-backref" href="#id3" id="rationale" name="rationale">Rationale</a></h1>
|
<h1><a class="toc-backref" href="#id3" name="rationale">Rationale</a></h1>
|
||||||
<ol class="arabic simple">
|
<ol class="arabic simple">
|
||||||
<li>There are two reasons for removing <tt class="docutils literal"><span class="pre">is_writable</span></tt>
|
<li>There are two reasons for removing <tt class="literal"><span class="pre">is_writable</span></tt>
|
||||||
and <tt class="docutils literal"><span class="pre">is_swappable</span></tt>. The first is that we do not know of
|
and <tt class="literal"><span class="pre">is_swappable</span></tt>. The first is that we do not know of
|
||||||
a way to fix the specification so that it gives the correct
|
a way to fix the specification so that it gives the correct
|
||||||
answer for all iterators. Second, there was only a weak
|
answer for all iterators. Second, there was only a weak
|
||||||
motivation for having <tt class="docutils literal"><span class="pre">is_writable</span></tt> and <tt class="docutils literal"><span class="pre">is_swappable</span></tt>
|
motivation for having <tt class="literal"><span class="pre">is_writable</span></tt> and <tt class="literal"><span class="pre">is_swappable</span></tt>
|
||||||
there in the first place. The main motivation was simply
|
there in the first place. The main motivation was simply
|
||||||
uniformity: we have tags for the old iterator categories
|
uniformity: we have tags for the old iterator categories
|
||||||
so we should have tags for the new iterator categories.
|
so we should have tags for the new iterator categories.
|
||||||
@ -423,29 +137,34 @@ less of a need for dispatching based on writability
|
|||||||
and swappability, since typically algorithms
|
and swappability, since typically algorithms
|
||||||
that need these capabilities have no alternative if
|
that need these capabilities have no alternative if
|
||||||
they are not provided.</li>
|
they are not provided.</li>
|
||||||
<li>We discovered that the <tt class="docutils literal"><span class="pre">is_readable</span></tt> trait can be implemented
|
<li>We discovered that the <tt class="literal"><span class="pre">is_readable</span></tt> trait can be implemented
|
||||||
using only the iterator type itself and its <tt class="docutils literal"><span class="pre">value_type</span></tt>.
|
using only the iterator type itself and its <tt class="literal"><span class="pre">value_type</span></tt>.
|
||||||
Therefore we remove the requirement for <tt class="docutils literal"><span class="pre">is_readable</span></tt> from the
|
Therefore we remove the requirement for <tt class="literal"><span class="pre">is_readable</span></tt> from the
|
||||||
Readable Iterator concept, and change the definition of
|
Readable Iterator concept, and change the definition of
|
||||||
<tt class="docutils literal"><span class="pre">is_readable</span></tt> so that it works for any iterator type.</li>
|
<tt class="literal"><span class="pre">is_readable</span></tt> so that it works for any iterator type.</li>
|
||||||
<li>The purpose of the <tt class="docutils literal"><span class="pre">iterator_tag</span></tt> class was to
|
<li>The purpose of the <tt class="literal"><span class="pre">iterator_tag</span></tt> class was to
|
||||||
bundle the traversal and access category tags
|
bundle the traversal and access category tags
|
||||||
into the <tt class="docutils literal"><span class="pre">iterator_category</span></tt> typedef.
|
into the <tt class="literal"><span class="pre">iterator_category</span></tt> typedef.
|
||||||
With <tt class="docutils literal"><span class="pre">is_writable</span></tt> and <tt class="docutils literal"><span class="pre">is_swappable</span></tt> gone, and
|
With <tt class="literal"><span class="pre">is_writable</span></tt> and <tt class="literal"><span class="pre">is_swappable</span></tt> gone, and
|
||||||
<tt class="docutils literal"><span class="pre">is_readable</span></tt> no longer in need of special hints,
|
<tt class="literal"><span class="pre">is_readable</span></tt> no longer in need of special hints,
|
||||||
there is no reason for iterators to provide
|
there is no reason for iterators to provide
|
||||||
information about the access capabilities of an iterator.
|
information about the access capabilities of an iterator.
|
||||||
Thus there is no need for the <tt class="docutils literal"><span class="pre">iterator_tag</span></tt>. The
|
Thus there is no need for the <tt class="literal"><span class="pre">iterator_tag</span></tt>. The
|
||||||
traversal tag can be directly used for the
|
traversal tag can be directly used for the
|
||||||
<tt class="docutils literal"><span class="pre">iterator_category</span></tt>. If a new iterator is intended to be backward
|
<tt class="literal"><span class="pre">iterator_category</span></tt>. If a new iterator is intended to be backward
|
||||||
compatible with old iterator concepts, a tag type
|
compatible with old iterator concepts, a tag type
|
||||||
that is convertible to both one of the new traversal tags
|
that is convertible to both one of the new traversal tags
|
||||||
and also to an old iterator tag can be created and use
|
and also to an old iterator tag can be created and use
|
||||||
for the <tt class="docutils literal"><span class="pre">iterator_category</span></tt>.</li>
|
for the <tt class="literal"><span class="pre">iterator_category</span></tt>.</li>
|
||||||
<li>The changes to the specification of <tt class="docutils literal"><span class="pre">traversal_category</span></tt> are a
|
<li>The changes to the specification of <tt class="literal"><span class="pre">traversal_category</span></tt> are a
|
||||||
direct result of the removal of <tt class="docutils literal"><span class="pre">iterator_tag</span></tt>.</li>
|
direct result of the removal of <tt class="literal"><span class="pre">iterator_tag</span></tt>.</li>
|
||||||
</ol>
|
</ol>
|
||||||
</div>
|
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|
||||||
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|
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|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="issues.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
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|
||||||
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|
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|
||||||
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|
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|
||||||
|
|||||||
5268
doc/iter-issue-list.html
Executable file
5268
doc/iter-issue-list.html
Executable file
File diff suppressed because it is too large
Load Diff
3841
doc/iter-issue-list.rst
Normal file
3841
doc/iter-issue-list.rst
Normal file
File diff suppressed because it is too large
Load Diff
@ -3,298 +3,15 @@
|
|||||||
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||||||
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|
<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
|
||||||
<title>Iterator Adaptor</title>
|
<title>Iterator Adaptor</title>
|
||||||
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
|
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
|
||||||
<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab, University of Hanover Institute for Transport Railway Operation and Construction" />
|
<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab, University of Hanover Institute for Transport Railway Operation and Construction" />
|
||||||
<meta name="date" content="2004-11-01" />
|
<meta name="date" content="2004-11-01" />
|
||||||
<meta name="copyright" content="Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003." />
|
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|
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|
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|
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|
||||||
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|
|
||||||
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|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
Default cascading style sheet for the HTML output of Docutils.
|
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||||||
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|
||||||
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|
|
||||||
customize this style sheet.
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|
||||||
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|
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|
||||||
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|
||||||
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|
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|
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|
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|
||||||
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|
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|
|
||||||
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|
|
||||||
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|
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|
||||||
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|
||||||
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|
||||||
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|
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|
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|
|
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|
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|
|
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|
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|
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|
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|
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|
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|
|
||||||
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|
|
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|
|
||||||
|
|
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|
|
||||||
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|
|
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width: 75% }
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|
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|
||||||
ol.upperalpha {
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|
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|
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|
|
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ol.lowerroman {
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|
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|
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|
|
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ol.upperroman {
|
|
||||||
list-style: upper-roman }
|
|
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|
|
||||||
p.attribution {
|
|
||||||
text-align: right ;
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|
||||||
margin-left: 50% }
|
|
||||||
|
|
||||||
p.caption {
|
|
||||||
font-style: italic }
|
|
||||||
|
|
||||||
p.credits {
|
|
||||||
font-style: italic ;
|
|
||||||
font-size: smaller }
|
|
||||||
|
|
||||||
p.label {
|
|
||||||
white-space: nowrap }
|
|
||||||
|
|
||||||
p.rubric {
|
|
||||||
font-weight: bold ;
|
|
||||||
font-size: larger ;
|
|
||||||
color: maroon ;
|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
font-weight: bold ;
|
|
||||||
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|
|
||||||
|
|
||||||
p.sidebar-subtitle {
|
|
||||||
font-family: sans-serif ;
|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
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|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
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|
|
||||||
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|
|
||||||
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|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
text-align: left ;
|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
h1 tt.docutils, h2 tt.docutils, h3 tt.docutils,
|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
tt.docutils {
|
|
||||||
background-color: #eeeeee }
|
|
||||||
|
|
||||||
ul.auto-toc {
|
|
||||||
list-style-type: none }
|
|
||||||
|
|
||||||
</style>
|
|
||||||
</head>
|
</head>
|
||||||
<body>
|
<body>
|
||||||
<div class="document" id="iterator-adaptor">
|
|
||||||
<h1 class="title">Iterator Adaptor</h1>
|
<h1 class="title">Iterator Adaptor</h1>
|
||||||
<table class="docinfo" frame="void" rules="none">
|
<table class="docinfo" frame="void" rules="none">
|
||||||
<col class="docinfo-name" />
|
<col class="docinfo-name" />
|
||||||
@ -314,10 +31,8 @@ Railway Operation and Construction</a></td></tr>
|
|||||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<!-- Distributed under the Boost -->
|
<div class="document" id="iterator-adaptor">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<table class="field-list" frame="void" rules="none">
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
@ -325,86 +40,77 @@ Railway Operation and Construction</a></td></tr>
|
|||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<!-- Distributed under the Boost -->
|
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<!-- Version 1.1 of this ReStructuredText document corresponds to
|
<!-- Version 1.1 of this ReStructuredText document corresponds to
|
||||||
n1530_, the paper accepted by the LWG. -->
|
n1530_, the paper accepted by the LWG. -->
|
||||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
||||||
<p>Each specialization of the <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> class template is derived from
|
<p>Each specialization of the <tt class="literal"><span class="pre">iterator_adaptor</span></tt> class template is derived from
|
||||||
a specialization of <tt class="docutils literal"><span class="pre">iterator_facade</span></tt>. The core interface functions
|
a specialization of <tt class="literal"><span class="pre">iterator_facade</span></tt>. The core interface functions
|
||||||
expected by <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> are implemented in terms of the
|
expected by <tt class="literal"><span class="pre">iterator_facade</span></tt> are implemented in terms of the
|
||||||
<tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt>'s <tt class="docutils literal"><span class="pre">Base</span></tt> template parameter. A class derived
|
<tt class="literal"><span class="pre">iterator_adaptor</span></tt>'s <tt class="literal"><span class="pre">Base</span></tt> template parameter. A class derived
|
||||||
from <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> typically redefines some of the core
|
from <tt class="literal"><span class="pre">iterator_adaptor</span></tt> typically redefines some of the core
|
||||||
interface functions to adapt the behavior of the <tt class="docutils literal"><span class="pre">Base</span></tt> type.
|
interface functions to adapt the behavior of the <tt class="literal"><span class="pre">Base</span></tt> type.
|
||||||
Whether the derived class models any of the standard iterator concepts
|
Whether the derived class models any of the standard iterator concepts
|
||||||
depends on the operations supported by the <tt class="docutils literal"><span class="pre">Base</span></tt> type and which
|
depends on the operations supported by the <tt class="literal"><span class="pre">Base</span></tt> type and which
|
||||||
core interface functions of <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> are redefined in the
|
core interface functions of <tt class="literal"><span class="pre">iterator_facade</span></tt> are redefined in the
|
||||||
<tt class="docutils literal"><span class="pre">Derived</span></tt> class.</p>
|
<tt class="literal"><span class="pre">Derived</span></tt> class.</p>
|
||||||
<div class="contents topic">
|
<div class="contents topic" id="table-of-contents">
|
||||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
<li><a class="reference" href="#overview" id="id6" name="id6">Overview</a></li>
|
<li><a class="reference" href="#overview" id="id6" name="id6">Overview</a></li>
|
||||||
<li><a class="reference" href="#reference" id="id7" name="id7">Reference</a><ul>
|
<li><a class="reference" href="#reference" id="id7" name="id7">Reference</a><ul>
|
||||||
<li><a class="reference" href="#iterator-adaptor-requirements" id="id8" name="id8"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> requirements</a></li>
|
<li><a class="reference" href="#iterator-adaptor-requirements" id="id8" name="id8"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> requirements</a></li>
|
||||||
<li><a class="reference" href="#iterator-adaptor-base-class-parameters" id="id9" name="id9"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> base class parameters</a></li>
|
<li><a class="reference" href="#iterator-adaptor-base-class-parameters" id="id9" name="id9"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> base class parameters</a></li>
|
||||||
<li><a class="reference" href="#iterator-adaptor-public-operations" id="id10" name="id10"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> public operations</a></li>
|
<li><a class="reference" href="#iterator-adaptor-public-operations" id="id10" name="id10"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> public operations</a></li>
|
||||||
<li><a class="reference" href="#iterator-adaptor-protected-member-functions" id="id11" name="id11"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> protected member functions</a></li>
|
<li><a class="reference" href="#iterator-adaptor-protected-member-functions" id="id11" name="id11"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> protected member functions</a></li>
|
||||||
<li><a class="reference" href="#iterator-adaptor-private-member-functions" id="id12" name="id12"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> private member functions</a></li>
|
<li><a class="reference" href="#iterator-adaptor-private-member-functions" id="id12" name="id12"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> private member functions</a></li>
|
||||||
</ul>
|
</ul>
|
||||||
</li>
|
</li>
|
||||||
<li><a class="reference" href="#tutorial-example" id="id13" name="id13">Tutorial Example</a></li>
|
<li><a class="reference" href="#tutorial-example" id="id13" name="id13">Tutorial Example</a></li>
|
||||||
</ul>
|
</ul>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="overview">
|
||||||
<h1><a class="toc-backref" href="#id6" id="overview" name="overview">Overview</a></h1>
|
<h1><a class="toc-backref" href="#id6" name="overview">Overview</a></h1>
|
||||||
<!-- Distributed under the Boost -->
|
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<!-- Version 1.2 of this ReStructuredText document corresponds to
|
<!-- Version 1.2 of this ReStructuredText document corresponds to
|
||||||
n1530_, the paper accepted by the LWG for TR1. -->
|
n1530_, the paper accepted by the LWG for TR1. -->
|
||||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
||||||
<p>The <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> class template adapts some <tt class="docutils literal"><span class="pre">Base</span></tt> <a class="footnote-reference" href="#base" id="id1" name="id1">[1]</a>
|
<p>The <tt class="literal"><span class="pre">iterator_adaptor</span></tt> class template adapts some <tt class="literal"><span class="pre">Base</span></tt> <a class="footnote-reference" href="#base" id="id1" name="id1"><sup>1</sup></a>
|
||||||
type to create a new iterator. Instantiations of <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt>
|
type to create a new iterator. Instantiations of <tt class="literal"><span class="pre">iterator_adaptor</span></tt>
|
||||||
are derived from a corresponding instantiation of <tt class="docutils literal"><span class="pre">iterator_facade</span></tt>
|
are derived from a corresponding instantiation of <tt class="literal"><span class="pre">iterator_facade</span></tt>
|
||||||
and implement the core behaviors in terms of the <tt class="docutils literal"><span class="pre">Base</span></tt> type. In
|
and implement the core behaviors in terms of the <tt class="literal"><span class="pre">Base</span></tt> type. In
|
||||||
essence, <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> merely forwards all operations to an
|
essence, <tt class="literal"><span class="pre">iterator_adaptor</span></tt> merely forwards all operations to an
|
||||||
instance of the <tt class="docutils literal"><span class="pre">Base</span></tt> type, which it stores as a member.</p>
|
instance of the <tt class="literal"><span class="pre">Base</span></tt> type, which it stores as a member.</p>
|
||||||
<table class="docutils footnote" frame="void" id="base" rules="none">
|
<table class="footnote" frame="void" id="base" rules="none">
|
||||||
<colgroup><col class="label" /><col /></colgroup>
|
<colgroup><col class="label" /><col /></colgroup>
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr><td class="label"><a name="base">[1]</a></td><td><em>(<a class="fn-backref" href="#id1">1</a>, <a class="fn-backref" href="#id3">2</a>)</em> The term "Base" here does not refer to a base class and is
|
<tr><td class="label"><a name="base">[1]</a></td><td><em>(<a class="fn-backref" href="#id1">1</a>, <a class="fn-backref" href="#id3">2</a>)</em> The term "Base" here does not refer to a base class and is
|
||||||
not meant to imply the use of derivation. We have followed the lead
|
not meant to imply the use of derivation. We have followed the lead
|
||||||
of the standard library, which provides a base() function to access
|
of the standard library, which provides a base() function to access
|
||||||
the underlying iterator object of a <tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> adaptor.</td></tr>
|
the underlying iterator object of a <tt class="literal"><span class="pre">reverse_iterator</span></tt> adaptor.</td></tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p>The user of <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> creates a class derived from an
|
<p>The user of <tt class="literal"><span class="pre">iterator_adaptor</span></tt> creates a class derived from an
|
||||||
instantiation of <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> and then selectively
|
instantiation of <tt class="literal"><span class="pre">iterator_adaptor</span></tt> and then selectively
|
||||||
redefines some of the core member functions described in the
|
redefines some of the core member functions described in the
|
||||||
<tt class="docutils literal"><span class="pre">iterator_facade</span></tt> core requirements table. The <tt class="docutils literal"><span class="pre">Base</span></tt> type need
|
<tt class="literal"><span class="pre">iterator_facade</span></tt> core requirements table. The <tt class="literal"><span class="pre">Base</span></tt> type need
|
||||||
not meet the full requirements for an iterator; it need only
|
not meet the full requirements for an iterator; it need only
|
||||||
support the operations used by the core interface functions of
|
support the operations used by the core interface functions of
|
||||||
<tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> that have not been redefined in the user's
|
<tt class="literal"><span class="pre">iterator_adaptor</span></tt> that have not been redefined in the user's
|
||||||
derived class.</p>
|
derived class.</p>
|
||||||
<p>Several of the template parameters of <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> default
|
<p>Several of the template parameters of <tt class="literal"><span class="pre">iterator_adaptor</span></tt> default
|
||||||
to <tt class="docutils literal"><span class="pre">use_default</span></tt>. This allows the
|
to <tt class="literal"><span class="pre">use_default</span></tt>. This allows the
|
||||||
user to make use of a default parameter even when she wants to
|
user to make use of a default parameter even when she wants to
|
||||||
specify a parameter later in the parameter list. Also, the
|
specify a parameter later in the parameter list. Also, the
|
||||||
defaults for the corresponding associated types are somewhat
|
defaults for the corresponding associated types are somewhat
|
||||||
complicated, so metaprogramming is required to compute them, and
|
complicated, so metaprogramming is required to compute them, and
|
||||||
<tt class="docutils literal"><span class="pre">use_default</span></tt> can help to simplify the implementation. Finally,
|
<tt class="literal"><span class="pre">use_default</span></tt> can help to simplify the implementation. Finally,
|
||||||
the identity of the <tt class="docutils literal"><span class="pre">use_default</span></tt> type is not left unspecified
|
the identity of the <tt class="literal"><span class="pre">use_default</span></tt> type is not left unspecified
|
||||||
because specification helps to highlight that the <tt class="docutils literal"><span class="pre">Reference</span></tt>
|
because specification helps to highlight that the <tt class="literal"><span class="pre">Reference</span></tt>
|
||||||
template parameter may not always be identical to the iterator's
|
template parameter may not always be identical to the iterator's
|
||||||
<tt class="docutils literal"><span class="pre">reference</span></tt> type, and will keep users from making mistakes based on
|
<tt class="literal"><span class="pre">reference</span></tt> type, and will keep users from making mistakes based on
|
||||||
that assumption.</p>
|
that assumption.</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="reference">
|
||||||
<h1><a class="toc-backref" href="#id7" id="reference" name="reference">Reference</a></h1>
|
<h1><a class="toc-backref" href="#id7" name="reference">Reference</a></h1>
|
||||||
<!-- Distributed under the Boost -->
|
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<!-- Version 1.4 of this ReStructuredText document corresponds to
|
<!-- Version 1.4 of this ReStructuredText document corresponds to
|
||||||
n1530_, the paper accepted by the LWG for TR1. -->
|
n1530_, the paper accepted by the LWG for TR1. -->
|
||||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
||||||
@ -423,8 +129,7 @@ class iterator_adaptor
|
|||||||
friend class iterator_core_access;
|
friend class iterator_core_access;
|
||||||
public:
|
public:
|
||||||
iterator_adaptor();
|
iterator_adaptor();
|
||||||
explicit iterator_adaptor(Base const& iter);
|
explicit iterator_adaptor(Base iter);
|
||||||
typedef Base base_type;
|
|
||||||
Base const& base() const;
|
Base const& base() const;
|
||||||
protected:
|
protected:
|
||||||
typedef iterator_adaptor iterator_adaptor_;
|
typedef iterator_adaptor iterator_adaptor_;
|
||||||
@ -452,15 +157,15 @@ class iterator_adaptor
|
|||||||
Base m_iterator; // exposition only
|
Base m_iterator; // exposition only
|
||||||
};
|
};
|
||||||
</pre>
|
</pre>
|
||||||
<div class="section">
|
<a class="target" id="requirements" name="requirements"></a><div class="section" id="iterator-adaptor-requirements">
|
||||||
<h2><a class="toc-backref" href="#id8" id="iterator-adaptor-requirements" name="iterator-adaptor-requirements"><span id="requirements"></span><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> requirements</a></h2>
|
<h2><a class="toc-backref" href="#id8" name="iterator-adaptor-requirements"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> requirements</a></h2>
|
||||||
<p><tt class="docutils literal"><span class="pre">static_cast<Derived*>(iterator_adaptor*)</span></tt> shall be well-formed.
|
<p><tt class="literal"><span class="pre">static_cast<Derived*>(iterator_adaptor*)</span></tt> shall be well-formed.
|
||||||
The <tt class="docutils literal"><span class="pre">Base</span></tt> argument shall be Assignable and Copy Constructible.</p>
|
The <tt class="literal"><span class="pre">Base</span></tt> argument shall be Assignable and Copy Constructible.</p>
|
||||||
</div>
|
<a class="target" id="base-parameters" name="base-parameters"></a></div>
|
||||||
<div class="section">
|
<div class="section" id="iterator-adaptor-base-class-parameters">
|
||||||
<h2><a class="toc-backref" href="#id9" id="iterator-adaptor-base-class-parameters" name="iterator-adaptor-base-class-parameters"><span id="base-parameters"></span><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> base class parameters</a></h2>
|
<h2><a class="toc-backref" href="#id9" name="iterator-adaptor-base-class-parameters"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> base class parameters</a></h2>
|
||||||
<p>The <em>V'</em>, <em>C'</em>, <em>R'</em>, and <em>D'</em> parameters of the <tt class="docutils literal"><span class="pre">iterator_facade</span></tt>
|
<p>The <em>V'</em>, <em>C'</em>, <em>R'</em>, and <em>D'</em> parameters of the <tt class="literal"><span class="pre">iterator_facade</span></tt>
|
||||||
used as a base class in the summary of <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt>
|
used as a base class in the summary of <tt class="literal"><span class="pre">iterator_adaptor</span></tt>
|
||||||
above are defined as follows:</p>
|
above are defined as follows:</p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
<em>V'</em> = if (Value is use_default)
|
<em>V'</em> = if (Value is use_default)
|
||||||
@ -498,69 +203,69 @@ expression involving ``Derived`` in those concepts' requirements. -->
|
|||||||
<!-- The above is confusing and needs a rewrite. -JGS -->
|
<!-- The above is confusing and needs a rewrite. -JGS -->
|
||||||
<!-- That's why it's removed. We're embracing inheritance, remember? -->
|
<!-- That's why it's removed. We're embracing inheritance, remember? -->
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="iterator-adaptor-public-operations">
|
||||||
<h2><a class="toc-backref" href="#id10" id="iterator-adaptor-public-operations" name="iterator-adaptor-public-operations"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> public operations</a></h2>
|
<h2><a class="toc-backref" href="#id10" name="iterator-adaptor-public-operations"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> public operations</a></h2>
|
||||||
<p><tt class="docutils literal"><span class="pre">iterator_adaptor();</span></tt></p>
|
<p><tt class="literal"><span class="pre">iterator_adaptor();</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body">The <tt class="docutils literal"><span class="pre">Base</span></tt> type must be Default Constructible.</td>
|
<tr class="field"><th class="field-name">Requires:</th><td class="field-body">The <tt class="literal"><span class="pre">Base</span></tt> type must be Default Constructible.</td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">An instance of <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> with
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">An instance of <tt class="literal"><span class="pre">iterator_adaptor</span></tt> with
|
||||||
<tt class="docutils literal"><span class="pre">m_iterator</span></tt> default constructed.</td>
|
<tt class="literal"><span class="pre">m_iterator</span></tt> default constructed.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">explicit</span> <span class="pre">iterator_adaptor(Base</span> <span class="pre">const&</span> <span class="pre">iter);</span></tt></p>
|
<p><tt class="literal"><span class="pre">explicit</span> <span class="pre">iterator_adaptor(Base</span> <span class="pre">iter);</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">An instance of <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> with
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">An instance of <tt class="literal"><span class="pre">iterator_adaptor</span></tt> with
|
||||||
<tt class="docutils literal"><span class="pre">m_iterator</span></tt> copy constructed from <tt class="docutils literal"><span class="pre">iter</span></tt>.</td>
|
<tt class="literal"><span class="pre">m_iterator</span></tt> copy constructed from <tt class="literal"><span class="pre">iter</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">Base</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
<p><tt class="literal"><span class="pre">Base</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">m_iterator</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_iterator</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="iterator-adaptor-protected-member-functions">
|
||||||
<h2><a class="toc-backref" href="#id11" id="iterator-adaptor-protected-member-functions" name="iterator-adaptor-protected-member-functions"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> protected member functions</a></h2>
|
<h2><a class="toc-backref" href="#id11" name="iterator-adaptor-protected-member-functions"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> protected member functions</a></h2>
|
||||||
<p><tt class="docutils literal"><span class="pre">Base</span> <span class="pre">const&</span> <span class="pre">base_reference()</span> <span class="pre">const;</span></tt></p>
|
<p><tt class="literal"><span class="pre">Base</span> <span class="pre">const&</span> <span class="pre">base_reference()</span> <span class="pre">const;</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">A const reference to <tt class="docutils literal"><span class="pre">m_iterator</span></tt>.</td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">A const reference to <tt class="literal"><span class="pre">m_iterator</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">Base&</span> <span class="pre">base_reference();</span></tt></p>
|
<p><tt class="literal"><span class="pre">Base&</span> <span class="pre">base_reference();</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">A non-const reference to <tt class="docutils literal"><span class="pre">m_iterator</span></tt>.</td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">A non-const reference to <tt class="literal"><span class="pre">m_iterator</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="iterator-adaptor-private-member-functions">
|
||||||
<h2><a class="toc-backref" href="#id12" id="iterator-adaptor-private-member-functions" name="iterator-adaptor-private-member-functions"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> private member functions</a></h2>
|
<h2><a class="toc-backref" href="#id12" name="iterator-adaptor-private-member-functions"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> private member functions</a></h2>
|
||||||
<p><tt class="docutils literal"><span class="pre">typename</span> <span class="pre">iterator_adaptor::reference</span> <span class="pre">dereference()</span> <span class="pre">const;</span></tt></p>
|
<p><tt class="literal"><span class="pre">typename</span> <span class="pre">iterator_adaptor::reference</span> <span class="pre">dereference()</span> <span class="pre">const;</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">*m_iterator</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*m_iterator</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
@ -570,38 +275,38 @@ class OtherDerived, class OtherIterator, class V, class C, class R, class D
|
|||||||
>
|
>
|
||||||
bool equal(iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& x) const;
|
bool equal(iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& x) const;
|
||||||
</pre>
|
</pre>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">m_iterator</span> <span class="pre">==</span> <span class="pre">x.base()</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_iterator</span> <span class="pre">==</span> <span class="pre">x.base()</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">void</span> <span class="pre">advance(typename</span> <span class="pre">iterator_adaptor::difference_type</span> <span class="pre">n);</span></tt></p>
|
<p><tt class="literal"><span class="pre">void</span> <span class="pre">advance(typename</span> <span class="pre">iterator_adaptor::difference_type</span> <span class="pre">n);</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="docutils literal"><span class="pre">m_iterator</span> <span class="pre">+=</span> <span class="pre">n;</span></tt></td>
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="literal"><span class="pre">m_iterator</span> <span class="pre">+=</span> <span class="pre">n;</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">void</span> <span class="pre">increment();</span></tt></p>
|
<p><tt class="literal"><span class="pre">void</span> <span class="pre">increment();</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="docutils literal"><span class="pre">++m_iterator;</span></tt></td>
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="literal"><span class="pre">++m_iterator;</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">void</span> <span class="pre">decrement();</span></tt></p>
|
<p><tt class="literal"><span class="pre">void</span> <span class="pre">decrement();</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="docutils literal"><span class="pre">--m_iterator;</span></tt></td>
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="literal"><span class="pre">--m_iterator;</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
@ -612,59 +317,59 @@ template <
|
|||||||
typename iterator_adaptor::difference_type distance_to(
|
typename iterator_adaptor::difference_type distance_to(
|
||||||
iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& y) const;
|
iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& y) const;
|
||||||
</pre>
|
</pre>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">y.base()</span> <span class="pre">-</span> <span class="pre">m_iterator</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">y.base()</span> <span class="pre">-</span> <span class="pre">m_iterator</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
</div>
|
</div>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="tutorial-example">
|
||||||
<h1><a class="toc-backref" href="#id13" id="tutorial-example" name="tutorial-example">Tutorial Example</a></h1>
|
<h1><a class="toc-backref" href="#id13" name="tutorial-example">Tutorial Example</a></h1>
|
||||||
<!-- Copyright David Abrahams 2004. Use, modification and distribution is -->
|
<!-- Copyright David Abrahams 2004. Use, modification and distribution is -->
|
||||||
<!-- subject to the Boost Software License, Version 1.0. (See accompanying -->
|
<!-- subject to the Boost Software License, Version 1.0. (See accompanying -->
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||||
<p>In this section we'll further refine the <tt class="docutils literal"><span class="pre">node_iter</span></tt> class
|
<p>In this section we'll further refine the <tt class="literal"><span class="pre">node_iter</span></tt> class
|
||||||
template we developed in the <a class="reference" href="iterator_facade.html#tutorial-example"><tt class="docutils literal"><span class="pre">iterator_facade</span></tt> tutorial</a>. If you haven't already
|
template we developed in the <a class="reference" href="iterator_facade.html#tutorial-example"><tt class="literal"><span class="pre">iterator_facade</span></tt> tutorial</a>. If you haven't already
|
||||||
read that material, you should go back now and check it out because
|
read that material, you should go back now and check it out because
|
||||||
we're going to pick up right where it left off.</p>
|
we're going to pick up right where it left off.</p>
|
||||||
<div class="sidebar">
|
<div class="sidebar">
|
||||||
<p class="first sidebar-title"><tt class="docutils literal"><span class="pre">node_base*</span></tt> really <em>is</em> an iterator</p>
|
<p class="sidebar-title first"><tt class="literal"><span class="pre">node_base*</span></tt> really <em>is</em> an iterator</p>
|
||||||
<p class="last">It's not really a very interesting iterator, since <tt class="docutils literal"><span class="pre">node_base</span></tt>
|
<p>It's not really a very interesting iterator, since <tt class="literal"><span class="pre">node_base</span></tt>
|
||||||
is an abstract class: a pointer to a <tt class="docutils literal"><span class="pre">node_base</span></tt> just points
|
is an abstract class: a pointer to a <tt class="literal"><span class="pre">node_base</span></tt> just points
|
||||||
at some base subobject of an instance of some other class, and
|
at some base subobject of an instance of some other class, and
|
||||||
incrementing a <tt class="docutils literal"><span class="pre">node_base*</span></tt> moves it past this base subobject
|
incrementing a <tt class="literal"><span class="pre">node_base*</span></tt> moves it past this base subobject
|
||||||
to who-knows-where? The most we can do with that incremented
|
to who-knows-where? The most we can do with that incremented
|
||||||
position is to compare another <tt class="docutils literal"><span class="pre">node_base*</span></tt> to it. In other
|
position is to compare another <tt class="literal"><span class="pre">node_base*</span></tt> to it. In other
|
||||||
words, the original iterator traverses a one-element array.</p>
|
words, the original iterator traverses a one-element array.</p>
|
||||||
</div>
|
</div>
|
||||||
<p>You probably didn't think of it this way, but the <tt class="docutils literal"><span class="pre">node_base*</span></tt>
|
<p>You probably didn't think of it this way, but the <tt class="literal"><span class="pre">node_base*</span></tt>
|
||||||
object that underlies <tt class="docutils literal"><span class="pre">node_iterator</span></tt> is itself an iterator,
|
object that underlies <tt class="literal"><span class="pre">node_iterator</span></tt> is itself an iterator,
|
||||||
just like all other pointers. If we examine that pointer closely
|
just like all other pointers. If we examine that pointer closely
|
||||||
from an iterator perspective, we can see that it has much in common
|
from an iterator perspective, we can see that it has much in common
|
||||||
with the <tt class="docutils literal"><span class="pre">node_iterator</span></tt> we're building. First, they share most
|
with the <tt class="literal"><span class="pre">node_iterator</span></tt> we're building. First, they share most
|
||||||
of the same associated types (<tt class="docutils literal"><span class="pre">value_type</span></tt>, <tt class="docutils literal"><span class="pre">reference</span></tt>,
|
of the same associated types (<tt class="literal"><span class="pre">value_type</span></tt>, <tt class="literal"><span class="pre">reference</span></tt>,
|
||||||
<tt class="docutils literal"><span class="pre">pointer</span></tt>, and <tt class="docutils literal"><span class="pre">difference_type</span></tt>). Second, even some of the
|
<tt class="literal"><span class="pre">pointer</span></tt>, and <tt class="literal"><span class="pre">difference_type</span></tt>). Second, even some of the
|
||||||
core functionality is the same: <tt class="docutils literal"><span class="pre">operator*</span></tt> and <tt class="docutils literal"><span class="pre">operator==</span></tt> on
|
core functionality is the same: <tt class="literal"><span class="pre">operator*</span></tt> and <tt class="literal"><span class="pre">operator==</span></tt> on
|
||||||
the <tt class="docutils literal"><span class="pre">node_iterator</span></tt> return the result of invoking the same
|
the <tt class="literal"><span class="pre">node_iterator</span></tt> return the result of invoking the same
|
||||||
operations on the underlying pointer, via the <tt class="docutils literal"><span class="pre">node_iterator</span></tt>'s
|
operations on the underlying pointer, via the <tt class="literal"><span class="pre">node_iterator</span></tt>'s
|
||||||
<a class="reference" href="iterator_facade.html#implementing-the-core-operations"><tt class="docutils literal"><span class="pre">dereference</span></tt> and <tt class="docutils literal"><span class="pre">equal</span></tt> member functions</a>). The only real behavioral difference
|
<a class="reference" href="iterator_facade.html#implementing-the-core-operations"><tt class="literal"><span class="pre">dereference</span></tt> and <tt class="literal"><span class="pre">equal</span></tt> member functions</a>). The only real behavioral difference
|
||||||
between <tt class="docutils literal"><span class="pre">node_base*</span></tt> and <tt class="docutils literal"><span class="pre">node_iterator</span></tt> can be observed when
|
between <tt class="literal"><span class="pre">node_base*</span></tt> and <tt class="literal"><span class="pre">node_iterator</span></tt> can be observed when
|
||||||
they are incremented: <tt class="docutils literal"><span class="pre">node_iterator</span></tt> follows the
|
they are incremented: <tt class="literal"><span class="pre">node_iterator</span></tt> follows the
|
||||||
<tt class="docutils literal"><span class="pre">m_next</span></tt> pointer, while <tt class="docutils literal"><span class="pre">node_base*</span></tt> just applies an address offset.</p>
|
<tt class="literal"><span class="pre">m_next</span></tt> pointer, while <tt class="literal"><span class="pre">node_base*</span></tt> just applies an address offset.</p>
|
||||||
<p>It turns out that the pattern of building an iterator on another
|
<p>It turns out that the pattern of building an iterator on another
|
||||||
iterator-like type (the <tt class="docutils literal"><span class="pre">Base</span></tt> <a class="footnote-reference" href="#base" id="id3" name="id3">[1]</a> type) while modifying
|
iterator-like type (the <tt class="literal"><span class="pre">Base</span></tt> <a class="footnote-reference" href="#base" id="id3" name="id3"><sup>1</sup></a> type) while modifying
|
||||||
just a few aspects of the underlying type's behavior is an
|
just a few aspects of the underlying type's behavior is an
|
||||||
extremely common one, and it's the pattern addressed by
|
extremely common one, and it's the pattern addressed by
|
||||||
<tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt>. Using <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> is very much like
|
<tt class="literal"><span class="pre">iterator_adaptor</span></tt>. Using <tt class="literal"><span class="pre">iterator_adaptor</span></tt> is very much like
|
||||||
using <tt class="docutils literal"><span class="pre">iterator_facade</span></tt>, but because iterator_adaptor tries to
|
using <tt class="literal"><span class="pre">iterator_facade</span></tt>, but because iterator_adaptor tries to
|
||||||
mimic as much of the <tt class="docutils literal"><span class="pre">Base</span></tt> type's behavior as possible, we
|
mimic as much of the <tt class="literal"><span class="pre">Base</span></tt> type's behavior as possible, we
|
||||||
neither have to supply a <tt class="docutils literal"><span class="pre">Value</span></tt> argument, nor implement any core
|
neither have to supply a <tt class="literal"><span class="pre">Value</span></tt> argument, nor implement any core
|
||||||
behaviors other than <tt class="docutils literal"><span class="pre">increment</span></tt>. The implementation of
|
behaviors other than <tt class="literal"><span class="pre">increment</span></tt>. The implementation of
|
||||||
<tt class="docutils literal"><span class="pre">node_iter</span></tt> is thus reduced to:</p>
|
<tt class="literal"><span class="pre">node_iter</span></tt> is thus reduced to:</p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
template <class Value>
|
template <class Value>
|
||||||
class node_iter
|
class node_iter
|
||||||
@ -700,38 +405,43 @@ class node_iter
|
|||||||
void increment() { this->base_reference() = this->base()->next(); }
|
void increment() { this->base_reference() = this->base()->next(); }
|
||||||
};
|
};
|
||||||
</pre>
|
</pre>
|
||||||
<p>Note the use of <tt class="docutils literal"><span class="pre">node_iter::iterator_adaptor_</span></tt> here: because
|
<p>Note the use of <tt class="literal"><span class="pre">node_iter::iterator_adaptor_</span></tt> here: because
|
||||||
<tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> defines a nested <tt class="docutils literal"><span class="pre">iterator_adaptor_</span></tt> type
|
<tt class="literal"><span class="pre">iterator_adaptor</span></tt> defines a nested <tt class="literal"><span class="pre">iterator_adaptor_</span></tt> type
|
||||||
that refers to itself, that gives us a convenient way to refer to
|
that refers to itself, that gives us a convenient way to refer to
|
||||||
the complicated base class type of <tt class="docutils literal"><span class="pre">node_iter<Value></span></tt>. [Note:
|
the complicated base class type of <tt class="literal"><span class="pre">node_iter<Value></span></tt>. [Note:
|
||||||
this technique is known not to work with Borland C++ 5.6.4 and
|
this technique is known not to work with Borland C++ 5.6.4 and
|
||||||
Metrowerks CodeWarrior versions prior to 9.0]</p>
|
Metrowerks CodeWarrior versions prior to 9.0]</p>
|
||||||
<p>You can see an example program that exercises this version of the
|
<p>You can see an example program that exercises this version of the
|
||||||
node iterators <a class="reference" href="../example/node_iterator3.cpp">here</a>.</p>
|
node iterators <a class="reference" href="../example/node_iterator3.cpp">here</a>.</p>
|
||||||
<p>In the case of <tt class="docutils literal"><span class="pre">node_iter</span></tt>, it's not very compelling to pass
|
<p>In the case of <tt class="literal"><span class="pre">node_iter</span></tt>, it's not very compelling to pass
|
||||||
<tt class="docutils literal"><span class="pre">boost::use_default</span></tt> as <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt>'s <tt class="docutils literal"><span class="pre">Value</span></tt>
|
<tt class="literal"><span class="pre">boost::use_default</span></tt> as <tt class="literal"><span class="pre">iterator_adaptor</span></tt>'s <tt class="literal"><span class="pre">Value</span></tt>
|
||||||
argument; we could have just passed <tt class="docutils literal"><span class="pre">node_iter</span></tt>'s <tt class="docutils literal"><span class="pre">Value</span></tt>
|
argument; we could have just passed <tt class="literal"><span class="pre">node_iter</span></tt>'s <tt class="literal"><span class="pre">Value</span></tt>
|
||||||
along to <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt>, and that'd even be shorter! Most
|
along to <tt class="literal"><span class="pre">iterator_adaptor</span></tt>, and that'd even be shorter! Most
|
||||||
iterator class templates built with <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> are
|
iterator class templates built with <tt class="literal"><span class="pre">iterator_adaptor</span></tt> are
|
||||||
parameterized on another iterator type, rather than on its
|
parameterized on another iterator type, rather than on its
|
||||||
<tt class="docutils literal"><span class="pre">value_type</span></tt>. For example, <tt class="docutils literal"><span class="pre">boost::reverse_iterator</span></tt> takes an
|
<tt class="literal"><span class="pre">value_type</span></tt>. For example, <tt class="literal"><span class="pre">boost::reverse_iterator</span></tt> takes an
|
||||||
iterator type argument and reverses its direction of traversal,
|
iterator type argument and reverses its direction of traversal,
|
||||||
since the original iterator and the reversed one have all the same
|
since the original iterator and the reversed one have all the same
|
||||||
associated types, <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt>'s delegation of default
|
associated types, <tt class="literal"><span class="pre">iterator_adaptor</span></tt>'s delegation of default
|
||||||
types to its <tt class="docutils literal"><span class="pre">Base</span></tt> saves the implementor of
|
types to its <tt class="literal"><span class="pre">Base</span></tt> saves the implementor of
|
||||||
<tt class="docutils literal"><span class="pre">boost::reverse_iterator</span></tt> from writing:</p>
|
<tt class="literal"><span class="pre">boost::reverse_iterator</span></tt> from writing:</p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
std::iterator_traits<Iterator>::<em>some-associated-type</em>
|
std::iterator_traits<Iterator>::<em>some-associated-type</em>
|
||||||
</pre>
|
</pre>
|
||||||
<p>at least four times.</p>
|
<p>at least four times.</p>
|
||||||
<p>We urge you to review the documentation and implementations of
|
<p>We urge you to review the documentation and implementations of
|
||||||
<a class="reference" href="reverse_iterator.html"><tt class="docutils literal"><span class="pre">reverse_iterator</span></tt></a> and the other Boost <a class="reference" href="index.html#specialized-adaptors">specialized iterator
|
<a class="reference" href="reverse_iterator.html"><tt class="literal"><span class="pre">reverse_iterator</span></tt></a> and the other Boost <a class="reference" href="index.html#specialized-adaptors">specialized iterator
|
||||||
adaptors</a> to get an idea of the sorts of things you can do with
|
adaptors</a> to get an idea of the sorts of things you can do with
|
||||||
<tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt>. In particular, have a look at
|
<tt class="literal"><span class="pre">iterator_adaptor</span></tt>. In particular, have a look at
|
||||||
<a class="reference" href="transform_iterator.html"><tt class="docutils literal"><span class="pre">transform_iterator</span></tt></a>, which is perhaps the most straightforward
|
<a class="reference" href="transform_iterator.html"><tt class="literal"><span class="pre">transform_iterator</span></tt></a>, which is perhaps the most straightforward
|
||||||
adaptor, and also <a class="reference" href="counting_iterator.html"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt></a>, which demonstrates that
|
adaptor, and also <a class="reference" href="counting_iterator.html"><tt class="literal"><span class="pre">counting_iterator</span></tt></a>, which demonstrates that
|
||||||
<tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt>'s <tt class="docutils literal"><span class="pre">Base</span></tt> type needn't be an iterator.</p>
|
<tt class="literal"><span class="pre">iterator_adaptor</span></tt>'s <tt class="literal"><span class="pre">Base</span></tt> type needn't be an iterator.</p>
|
||||||
</div>
|
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|
||||||
</div>
|
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|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="iterator_adaptor.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
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|
||||||
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|
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|
||||||
</html>
|
</html>
|
||||||
|
|||||||
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|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
+++++++++++++++++
|
+++++++++++++++++
|
||||||
Iterator Adaptor
|
Iterator Adaptor
|
||||||
+++++++++++++++++
|
+++++++++++++++++
|
||||||
|
|||||||
22
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Index: iterator_adaptor_abstract.rst
|
||||||
|
===================================================================
|
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|
RCS file: /cvsroot/boost/boost/libs/iterator/doc/iterator_adaptor_abstract.rst,v
|
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|
retrieving revision 1.1
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retrieving revision 1.2
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|
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|
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|
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|
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|
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|
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|
-The ``iterator_adaptor`` is a base class template derived from an
|
||||||
|
-instantiation of ``iterator_facade``. The core interface functions
|
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|
+.. Version 1.1 of this ReStructuredText document corresponds to
|
||||||
|
+ n1530_, the paper accepted by the LWG.
|
||||||
|
+
|
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|
+.. Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. All
|
||||||
|
+ rights reserved
|
||||||
|
+
|
||||||
|
+Each specialization of the ``iterator_adaptor`` class template is derived from
|
||||||
|
+a specialization of ``iterator_facade``. The core interface functions
|
||||||
|
expected by ``iterator_facade`` are implemented in terms of the
|
||||||
|
``iterator_adaptor``\ 's ``Base`` template parameter. A class derived
|
||||||
|
from ``iterator_adaptor`` typically redefines some of the core
|
||||||
@ -1,7 +1,3 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
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||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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.. Version 1.1 of this ReStructuredText document corresponds to
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Index: iterator_adaptor_body.rst
|
||||||
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===================================================================
|
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|
||||||
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+++ iterator_adaptor_body.rst 24 Nov 2003 05:02:46 -0000 1.3
|
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|
||||||
|
+.. Version 1.2 of this ReStructuredText document corresponds to
|
||||||
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+ n1530_, the paper accepted by the LWG for TR1.
|
||||||
|
+
|
||||||
|
+.. Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. All
|
||||||
|
+ rights reserved
|
||||||
|
+
|
||||||
|
The ``iterator_adaptor`` class template adapts some ``Base`` [#base]_
|
||||||
|
type to create a new iterator. Instantiations of ``iterator_adaptor``
|
||||||
|
are derived from a corresponding instantiation of ``iterator_facade``
|
||||||
|
@@ -19,7 +25,7 @@ Issue 9.1 et al
|
||||||
|
redefined in the user's derived class.
|
||||||
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|
||||||
|
Several of the template parameters of ``iterator_adaptor`` default
|
||||||
|
-to ``use_default`` (or ``use_default_access``). This allows the
|
||||||
|
+to ``use_default``. This allows the
|
||||||
|
user to make use of a default parameter even when she wants to
|
||||||
|
specify a parameter later in the parameter list. Also, the
|
||||||
|
defaults for the corresponding associated types are somewhat
|
||||||
|
@@ -28,6 +34,6 @@ Issue 9.45y
|
||||||
|
the identity of the ``use_default`` type is not left unspecified
|
||||||
|
because specification helps to highlight that the ``Reference``
|
||||||
|
template parameter may not always be identical to the iterator's
|
||||||
|
-``reference`` type, and will keep users making mistakes based on
|
||||||
|
+``reference`` type, and will keep users from making mistakes based on
|
||||||
|
that assumption.
|
||||||
|
|
||||||
@ -1,7 +1,3 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
.. Version 1.2 of this ReStructuredText document corresponds to
|
.. Version 1.2 of this ReStructuredText document corresponds to
|
||||||
n1530_, the paper accepted by the LWG for TR1.
|
n1530_, the paper accepted by the LWG for TR1.
|
||||||
|
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|
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|
||||||
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|
||||||
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|
||||||
|
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|
||||||
|
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|
||||||
|
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|
||||||
|
<!-- Version 1.4 of this ReStructuredText document corresponds to
|
||||||
|
n1530_, the paper accepted by the LWG for TR1. -->
|
||||||
|
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
||||||
|
<pre class="literal-block">
|
||||||
|
template <
|
||||||
|
class Derived
|
||||||
|
, class Base
|
||||||
|
, class Value = use_default
|
||||||
|
, class CategoryOrTraversal = use_default
|
||||||
|
, class Reference = use_default
|
||||||
|
, class Difference = use_default
|
||||||
|
>
|
||||||
|
class iterator_adaptor
|
||||||
|
: public iterator_facade<Derived, <em>V'</em>, <em>C'</em>, <em>R'</em>, <em>D'</em>> // see <a class="reference" href="#base-parameters">details</a>
|
||||||
|
{
|
||||||
|
friend class iterator_core_access;
|
||||||
|
public:
|
||||||
|
iterator_adaptor();
|
||||||
|
explicit iterator_adaptor(Base iter);
|
||||||
|
Base const& base() const;
|
||||||
|
protected:
|
||||||
|
typedef iterator_adaptor iterator_adaptor_;
|
||||||
|
Base const& base_reference() const;
|
||||||
|
Base& base_reference();
|
||||||
|
private: // Core iterator interface for iterator_facade.
|
||||||
|
typename iterator_adaptor::reference dereference() const;
|
||||||
|
|
||||||
|
template <
|
||||||
|
class OtherDerived, class OtherIterator, class V, class C, class R, class D
|
||||||
|
>
|
||||||
|
bool equal(iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& x) const;
|
||||||
|
|
||||||
|
void advance(typename iterator_adaptor::difference_type n);
|
||||||
|
void increment();
|
||||||
|
void decrement();
|
||||||
|
|
||||||
|
template <
|
||||||
|
class OtherDerived, class OtherIterator, class V, class C, class R, class D
|
||||||
|
>
|
||||||
|
typename iterator_adaptor::difference_type distance_to(
|
||||||
|
iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& y) const;
|
||||||
|
|
||||||
|
private:
|
||||||
|
Base m_iterator; // exposition only
|
||||||
|
};
|
||||||
|
</pre>
|
||||||
|
<a class="target" id="requirements" name="requirements"></a><div class="section" id="iterator-adaptor-requirements">
|
||||||
|
<h1><a name="iterator-adaptor-requirements"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> requirements</a></h1>
|
||||||
|
<p><tt class="literal"><span class="pre">static_cast<Derived*>(iterator_adaptor*)</span></tt> shall be well-formed.
|
||||||
|
The <tt class="literal"><span class="pre">Base</span></tt> argument shall be Assignable and Copy Constructible.</p>
|
||||||
|
<a class="target" id="base-parameters" name="base-parameters"></a></div>
|
||||||
|
<div class="section" id="iterator-adaptor-base-class-parameters">
|
||||||
|
<h1><a name="iterator-adaptor-base-class-parameters"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> base class parameters</a></h1>
|
||||||
|
<p>The <em>V'</em>, <em>C'</em>, <em>R'</em>, and <em>D'</em> parameters of the <tt class="literal"><span class="pre">iterator_facade</span></tt>
|
||||||
|
used as a base class in the summary of <tt class="literal"><span class="pre">iterator_adaptor</span></tt>
|
||||||
|
above are defined as follows:</p>
|
||||||
|
<pre class="literal-block">
|
||||||
|
<em>V'</em> = if (Value is use_default)
|
||||||
|
return iterator_traits<Base>::value_type
|
||||||
|
else
|
||||||
|
return Value
|
||||||
|
|
||||||
|
<em>C'</em> = if (CategoryOrTraversal is use_default)
|
||||||
|
return iterator_traversal<Base>::type
|
||||||
|
else
|
||||||
|
return CategoryOrTraversal
|
||||||
|
|
||||||
|
<em>R'</em> = if (Reference is use_default)
|
||||||
|
if (Value is use_default)
|
||||||
|
return iterator_traits<Base>::reference
|
||||||
|
else
|
||||||
|
return Value&
|
||||||
|
else
|
||||||
|
return Reference
|
||||||
|
|
||||||
|
<em>D'</em> = if (Difference is use_default)
|
||||||
|
return iterator_traits<Base>::difference_type
|
||||||
|
else
|
||||||
|
return Difference
|
||||||
|
</pre>
|
||||||
|
<!-- ``iterator_adaptor`` models
|
||||||
|
- - - - - - - - - - - - - - - - - - - - - - - - - - -
|
||||||
|
|
||||||
|
In order for ``Derived`` to model the iterator concepts corresponding
|
||||||
|
to ``iterator_traits<Derived>::iterator_category``, the expressions
|
||||||
|
involving ``m_iterator`` in the specifications of those private member
|
||||||
|
functions of ``iterator_adaptor`` that may be called by
|
||||||
|
``iterator_facade<Derived, V, C, R, D>`` in evaluating any valid
|
||||||
|
expression involving ``Derived`` in those concepts' requirements. -->
|
||||||
|
<!-- The above is confusing and needs a rewrite. -JGS -->
|
||||||
|
<!-- That's why it's removed. We're embracing inheritance, remember? -->
|
||||||
|
</div>
|
||||||
|
<div class="section" id="iterator-adaptor-public-operations">
|
||||||
|
<h1><a name="iterator-adaptor-public-operations"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> public operations</a></h1>
|
||||||
|
<p><tt class="literal"><span class="pre">iterator_adaptor();</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Requires:</th><td class="field-body">The <tt class="literal"><span class="pre">Base</span></tt> type must be Default Constructible.</td>
|
||||||
|
</tr>
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">An instance of <tt class="literal"><span class="pre">iterator_adaptor</span></tt> with
|
||||||
|
<tt class="literal"><span class="pre">m_iterator</span></tt> default constructed.</td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">explicit</span> <span class="pre">iterator_adaptor(Base</span> <span class="pre">iter);</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">An instance of <tt class="literal"><span class="pre">iterator_adaptor</span></tt> with
|
||||||
|
<tt class="literal"><span class="pre">m_iterator</span></tt> copy constructed from <tt class="literal"><span class="pre">iter</span></tt>.</td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">Base</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_iterator</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
</div>
|
||||||
|
<div class="section" id="iterator-adaptor-protected-member-functions">
|
||||||
|
<h1><a name="iterator-adaptor-protected-member-functions"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> protected member functions</a></h1>
|
||||||
|
<p><tt class="literal"><span class="pre">Base</span> <span class="pre">const&</span> <span class="pre">base_reference()</span> <span class="pre">const;</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">A const reference to <tt class="literal"><span class="pre">m_iterator</span></tt>.</td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">Base&</span> <span class="pre">base_reference();</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">A non-const reference to <tt class="literal"><span class="pre">m_iterator</span></tt>.</td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
</div>
|
||||||
|
<div class="section" id="iterator-adaptor-private-member-functions">
|
||||||
|
<h1><a name="iterator-adaptor-private-member-functions"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> private member functions</a></h1>
|
||||||
|
<p><tt class="literal"><span class="pre">typename</span> <span class="pre">iterator_adaptor::reference</span> <span class="pre">dereference()</span> <span class="pre">const;</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*m_iterator</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<pre class="literal-block">
|
||||||
|
template <
|
||||||
|
class OtherDerived, class OtherIterator, class V, class C, class R, class D
|
||||||
|
>
|
||||||
|
bool equal(iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& x) const;
|
||||||
|
</pre>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_iterator</span> <span class="pre">==</span> <span class="pre">x.base()</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">void</span> <span class="pre">advance(typename</span> <span class="pre">iterator_adaptor::difference_type</span> <span class="pre">n);</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="literal"><span class="pre">m_iterator</span> <span class="pre">+=</span> <span class="pre">n;</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">void</span> <span class="pre">increment();</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="literal"><span class="pre">++m_iterator;</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<p><tt class="literal"><span class="pre">void</span> <span class="pre">decrement();</span></tt></p>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="literal"><span class="pre">--m_iterator;</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
<pre class="literal-block">
|
||||||
|
template <
|
||||||
|
class OtherDerived, class OtherIterator, class V, class C, class R, class D
|
||||||
|
>
|
||||||
|
typename iterator_adaptor::difference_type distance_to(
|
||||||
|
iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& y) const;
|
||||||
|
</pre>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
<col class="field-name" />
|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">y.base()</span> <span class="pre">-</span> <span class="pre">m_iterator</span></tt></td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
</div>
|
||||||
|
</div>
|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="iterator_adaptor_ref.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
</div>
|
||||||
|
</body>
|
||||||
|
</html>
|
||||||
@ -1,7 +1,3 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
.. Version 1.4 of this ReStructuredText document corresponds to
|
.. Version 1.4 of this ReStructuredText document corresponds to
|
||||||
n1530_, the paper accepted by the LWG for TR1.
|
n1530_, the paper accepted by the LWG for TR1.
|
||||||
|
|
||||||
@ -23,8 +19,7 @@
|
|||||||
friend class iterator_core_access;
|
friend class iterator_core_access;
|
||||||
public:
|
public:
|
||||||
iterator_adaptor();
|
iterator_adaptor();
|
||||||
explicit iterator_adaptor(Base const& iter);
|
explicit iterator_adaptor(Base iter);
|
||||||
typedef Base base_type;
|
|
||||||
Base const& base() const;
|
Base const& base() const;
|
||||||
protected:
|
protected:
|
||||||
typedef iterator_adaptor iterator_adaptor\_;
|
typedef iterator_adaptor iterator_adaptor\_;
|
||||||
@ -120,7 +115,7 @@ above are defined as follows:
|
|||||||
``m_iterator`` default constructed.
|
``m_iterator`` default constructed.
|
||||||
|
|
||||||
|
|
||||||
``explicit iterator_adaptor(Base const& iter);``
|
``explicit iterator_adaptor(Base iter);``
|
||||||
|
|
||||||
:Returns: An instance of ``iterator_adaptor`` with
|
:Returns: An instance of ``iterator_adaptor`` with
|
||||||
``m_iterator`` copy constructed from ``iter``.
|
``m_iterator`` copy constructed from ``iter``.
|
||||||
|
|||||||
@ -3,298 +3,15 @@
|
|||||||
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||||||
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|
<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
|
||||||
<title>Iterator Archetype</title>
|
<title>Iterator Archetype</title>
|
||||||
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
|
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
|
||||||
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|
<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab, Zephyr Associates, Inc." />
|
||||||
<meta name="date" content="2004-11-01" />
|
<meta name="date" content="2004-11-01" />
|
||||||
<meta name="copyright" content="Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2004." />
|
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|
||||||
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|
<link rel="stylesheet" href="default.css" type="text/css" />
|
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|
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|
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:Author: David Goodger
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|
||||||
:Contact: goodger@users.sourceforge.net
|
|
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|
||||||
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|
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customize this style sheet.
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margin: 2em }
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|
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|
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|
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|
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|
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|
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|
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|
|
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|
|
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</head>
|
</head>
|
||||||
<body>
|
<body>
|
||||||
<div class="document" id="iterator-archetype">
|
|
||||||
<h1 class="title">Iterator Archetype</h1>
|
<h1 class="title">Iterator Archetype</h1>
|
||||||
<table class="docinfo" frame="void" rules="none">
|
<table class="docinfo" frame="void" rules="none">
|
||||||
<col class="docinfo-name" />
|
<col class="docinfo-name" />
|
||||||
@ -313,38 +30,36 @@ Lab</a>, <a class="last reference" href="http://www.styleadvisor.com">Zephyr Ass
|
|||||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2004.</td></tr>
|
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2004.</td></tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<!-- Distributed under the Boost -->
|
<div class="document" id="iterator-archetype">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<table class="field-list" frame="void" rules="none">
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<table class="docutils field-list" frame="void" rules="none">
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|
||||||
<col class="field-name" />
|
<col class="field-name" />
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||||||
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|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body">The <tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> class constructs a minimal implementation of
|
<tr class="field"><th class="field-name">abstract:</th><td class="field-body">The <tt class="literal"><span class="pre">iterator_archetype</span></tt> class constructs a minimal implementation of
|
||||||
one of the iterator access concepts and one of the iterator traversal concepts.
|
one of the iterator access concepts and one of the iterator traversal concepts.
|
||||||
This is used for doing a compile-time check to see if a the type requirements
|
This is used for doing a compile-time check to see if a the type requirements
|
||||||
of a template are really enough to cover the implementation of the template.
|
of a template are really enough to cover the implementation of the template.
|
||||||
For further information see the documentation for the <a class="reference" href="../../concept_check/index.html"><tt class="docutils literal"><span class="pre">boost::concept_check</span></tt></a> library.</td>
|
For further information see the documentation for the <a class="reference" href="../../concept_check/index.html"><tt class="literal"><span class="pre">boost::concept_check</span></tt></a> library.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<div class="contents topic">
|
<div class="contents topic" id="table-of-contents">
|
||||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
<li><a class="reference" href="#reference" id="id1" name="id1">Reference</a><ul>
|
<li><a class="reference" href="#reference" id="id1" name="id1">Reference</a><ul>
|
||||||
<li><a class="reference" href="#iterator-archetype-synopsis" id="id2" name="id2"><tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> Synopsis</a></li>
|
<li><a class="reference" href="#iterator-archetype-synopsis" id="id2" name="id2"><tt class="literal"><span class="pre">iterator_archetype</span></tt> Synopsis</a></li>
|
||||||
<li><a class="reference" href="#access-category-tags" id="id3" name="id3"><tt class="docutils literal"><span class="pre">Access</span> <span class="pre">Category</span> <span class="pre">Tags</span></tt></a></li>
|
<li><a class="reference" href="#access-category-tags" id="id3" name="id3"><tt class="literal"><span class="pre">Access</span> <span class="pre">Category</span> <span class="pre">Tags</span></tt></a></li>
|
||||||
<li><a class="reference" href="#iterator-archetype-requirements" id="id4" name="id4"><tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> Requirements</a></li>
|
<li><a class="reference" href="#iterator-archetype-requirements" id="id4" name="id4"><tt class="literal"><span class="pre">iterator_archetype</span></tt> Requirements</a></li>
|
||||||
<li><a class="reference" href="#iterator-archetype-models" id="id5" name="id5"><tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> Models</a></li>
|
<li><a class="reference" href="#iterator-archetype-models" id="id5" name="id5"><tt class="literal"><span class="pre">iterator_archetype</span></tt> Models</a></li>
|
||||||
<li><a class="reference" href="#traits" id="id6" name="id6"><tt class="docutils literal"><span class="pre">Traits</span></tt></a></li>
|
<li><a class="reference" href="#traits" id="id6" name="id6"><tt class="literal"><span class="pre">Traits</span></tt></a></li>
|
||||||
</ul>
|
</ul>
|
||||||
</li>
|
</li>
|
||||||
</ul>
|
</ul>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="reference">
|
||||||
<h1><a class="toc-backref" href="#id1" id="reference" name="reference">Reference</a></h1>
|
<h1><a class="toc-backref" href="#id1" name="reference">Reference</a></h1>
|
||||||
<div class="section">
|
<div class="section" id="iterator-archetype-synopsis">
|
||||||
<h2><a class="toc-backref" href="#id2" id="iterator-archetype-synopsis" name="iterator-archetype-synopsis"><tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> Synopsis</a></h2>
|
<h2><a class="toc-backref" href="#id2" name="iterator-archetype-synopsis"><tt class="literal"><span class="pre">iterator_archetype</span></tt> Synopsis</a></h2>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
namespace iterator_archetypes
|
namespace iterator_archetypes
|
||||||
{
|
{
|
||||||
@ -373,8 +88,8 @@ class iterator_archetype
|
|||||||
};
|
};
|
||||||
</pre>
|
</pre>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="access-category-tags">
|
||||||
<h2><a class="toc-backref" href="#id3" id="access-category-tags" name="access-category-tags"><tt class="docutils literal"><span class="pre">Access</span> <span class="pre">Category</span> <span class="pre">Tags</span></tt></a></h2>
|
<h2><a class="toc-backref" href="#id3" name="access-category-tags"><tt class="literal"><span class="pre">Access</span> <span class="pre">Category</span> <span class="pre">Tags</span></tt></a></h2>
|
||||||
<p>The access category types provided correspond to the following
|
<p>The access category types provided correspond to the following
|
||||||
standard iterator access concept combinations:</p>
|
standard iterator access concept combinations:</p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
@ -399,23 +114,23 @@ writeable_lvalue_iterator_t :=
|
|||||||
Readable Iterator & Writeable Iterator & Swappable Iterator & Lvalue Iterator
|
Readable Iterator & Writeable Iterator & Swappable Iterator & Lvalue Iterator
|
||||||
</pre>
|
</pre>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="iterator-archetype-requirements">
|
||||||
<h2><a class="toc-backref" href="#id4" id="iterator-archetype-requirements" name="iterator-archetype-requirements"><tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> Requirements</a></h2>
|
<h2><a class="toc-backref" href="#id4" name="iterator-archetype-requirements"><tt class="literal"><span class="pre">iterator_archetype</span></tt> Requirements</a></h2>
|
||||||
<p>The <tt class="docutils literal"><span class="pre">AccessCategory</span></tt> argument must be one of the predefined access
|
<p>The <tt class="literal"><span class="pre">AccessCategory</span></tt> argument must be one of the predefined access
|
||||||
category tags. The <tt class="docutils literal"><span class="pre">TraversalCategory</span></tt> must be one of the standard
|
category tags. The <tt class="literal"><span class="pre">TraversalCategory</span></tt> must be one of the standard
|
||||||
traversal tags. The <tt class="docutils literal"><span class="pre">Value</span></tt> type must satisfy the requirements of
|
traversal tags. The <tt class="literal"><span class="pre">Value</span></tt> type must satisfy the requirements of
|
||||||
the iterator concept specified by <tt class="docutils literal"><span class="pre">AccessCategory</span></tt> and
|
the iterator concept specified by <tt class="literal"><span class="pre">AccessCategory</span></tt> and
|
||||||
<tt class="docutils literal"><span class="pre">TraversalCategory</span></tt> as implied by the nested traits types.</p>
|
<tt class="literal"><span class="pre">TraversalCategory</span></tt> as implied by the nested traits types.</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="iterator-archetype-models">
|
||||||
<h2><a class="toc-backref" href="#id5" id="iterator-archetype-models" name="iterator-archetype-models"><tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> Models</a></h2>
|
<h2><a class="toc-backref" href="#id5" name="iterator-archetype-models"><tt class="literal"><span class="pre">iterator_archetype</span></tt> Models</a></h2>
|
||||||
<p><tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> models the iterator concepts specified by the
|
<p><tt class="literal"><span class="pre">iterator_archetype</span></tt> models the iterator concepts specified by the
|
||||||
<tt class="docutils literal"><span class="pre">AccessCategory</span></tt> and <tt class="docutils literal"><span class="pre">TraversalCategory</span></tt>
|
<tt class="literal"><span class="pre">AccessCategory</span></tt> and <tt class="literal"><span class="pre">TraversalCategory</span></tt>
|
||||||
arguments. <tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> does not model any other access
|
arguments. <tt class="literal"><span class="pre">iterator_archetype</span></tt> does not model any other access
|
||||||
concepts or any more derived traversal concepts.</p>
|
concepts or any more derived traversal concepts.</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="traits">
|
||||||
<h2><a class="toc-backref" href="#id6" id="traits" name="traits"><tt class="docutils literal"><span class="pre">Traits</span></tt></a></h2>
|
<h2><a class="toc-backref" href="#id6" name="traits"><tt class="literal"><span class="pre">Traits</span></tt></a></h2>
|
||||||
<p>The nested trait types are defined as follows:</p>
|
<p>The nested trait types are defined as follows:</p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
if (AccessCategory == readable_iterator_t)
|
if (AccessCategory == readable_iterator_t)
|
||||||
@ -496,5 +211,10 @@ iterator_category :=
|
|||||||
</div>
|
</div>
|
||||||
</div>
|
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|
||||||
</div>
|
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|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="iterator_archetypes.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
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||||||
</body>
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||||||
</html>
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|
||||||
|
|||||||
Binary file not shown.
@ -1,7 +1,3 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
++++++++++++++++++++
|
++++++++++++++++++++
|
||||||
Iterator Archetype
|
Iterator Archetype
|
||||||
++++++++++++++++++++
|
++++++++++++++++++++
|
||||||
|
|||||||
@ -3,298 +3,15 @@
|
|||||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
|
||||||
<title>Iterator Concepts</title>
|
<title>Iterator Concepts</title>
|
||||||
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
|
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
|
||||||
<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab, Zephyr Associates, Inc." />
|
<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab, Zephyr Associates, Inc." />
|
||||||
<meta name="date" content="2004-11-01" />
|
<meta name="date" content="2004-11-01" />
|
||||||
<meta name="copyright" content="Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2004." />
|
<meta name="copyright" content="Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2004." />
|
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<style type="text/css">
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<link rel="stylesheet" href="default.css" type="text/css" />
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/*
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:Author: David Goodger
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:Contact: goodger@users.sourceforge.net
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:Date: $Date$
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:Copyright: This stylesheet has been placed in the public domain.
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Default cascading style sheet for the HTML output of Docutils.
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customize this style sheet.
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*/
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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|
||||||
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|
||||||
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||||||
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||||||
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|
||||||
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|
||||||
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||||||
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||||||
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||||||
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|
||||||
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|
||||||
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|
||||||
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|
||||||
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||||||
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|
|
||||||
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|
|
||||||
padding-left: 0 }
|
|
||||||
|
|
||||||
h1 tt.docutils, h2 tt.docutils, h3 tt.docutils,
|
|
||||||
h4 tt.docutils, h5 tt.docutils, h6 tt.docutils {
|
|
||||||
font-size: 100% }
|
|
||||||
|
|
||||||
tt.docutils {
|
|
||||||
background-color: #eeeeee }
|
|
||||||
|
|
||||||
ul.auto-toc {
|
|
||||||
list-style-type: none }
|
|
||||||
|
|
||||||
</style>
|
|
||||||
</head>
|
</head>
|
||||||
<body>
|
<body>
|
||||||
<div class="document" id="iterator-concepts">
|
|
||||||
<h1 class="title">Iterator Concepts</h1>
|
<h1 class="title">Iterator Concepts</h1>
|
||||||
<table class="docinfo" frame="void" rules="none">
|
<table class="docinfo" frame="void" rules="none">
|
||||||
<col class="docinfo-name" />
|
<col class="docinfo-name" />
|
||||||
@ -313,10 +30,8 @@ Lab</a>, <a class="last reference" href="http://www.styleadvisor.com">Zephyr Ass
|
|||||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2004.</td></tr>
|
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2004.</td></tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<!-- Distributed under the Boost -->
|
<div class="document" id="iterator-concepts">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<table class="field-list" frame="void" rules="none">
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
@ -328,11 +43,11 @@ the template.</td>
|
|||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p>For an introduction to using concept checking classes, see
|
<p>For an introduction to using concept checking classes, see
|
||||||
the documentation for the <a class="reference" href="../../concept_check/index.html"><tt class="docutils literal"><span class="pre">boost::concept_check</span></tt></a> library.</p>
|
the documentation for the <a class="reference" href="../../concept_check/index.html"><tt class="literal"><span class="pre">boost::concept_check</span></tt></a> library.</p>
|
||||||
<div class="section">
|
<div class="section" id="reference">
|
||||||
<h1><a id="reference" name="reference">Reference</a></h1>
|
<h1><a name="reference">Reference</a></h1>
|
||||||
<div class="section">
|
<div class="section" id="iterator-access-concepts">
|
||||||
<h2><a id="iterator-access-concepts" name="iterator-access-concepts">Iterator Access Concepts</a></h2>
|
<h2><a name="iterator-access-concepts">Iterator Access Concepts</a></h2>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
<li><a class="reference" href="ReadableIterator.html"><em>Readable Iterator</em></a></li>
|
<li><a class="reference" href="ReadableIterator.html"><em>Readable Iterator</em></a></li>
|
||||||
<li><a class="reference" href="WritableIterator.html"><em>Writable Iterator</em></a></li>
|
<li><a class="reference" href="WritableIterator.html"><em>Writable Iterator</em></a></li>
|
||||||
@ -340,8 +55,8 @@ the documentation for the <a class="reference" href="../../concept_check/index.h
|
|||||||
<li><a class="reference" href="LvalueIterator.html"><em>Lvalue Iterator</em></a></li>
|
<li><a class="reference" href="LvalueIterator.html"><em>Lvalue Iterator</em></a></li>
|
||||||
</ul>
|
</ul>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="iterator-traversal-concepts">
|
||||||
<h2><a id="iterator-traversal-concepts" name="iterator-traversal-concepts">Iterator Traversal Concepts</a></h2>
|
<h2><a name="iterator-traversal-concepts">Iterator Traversal Concepts</a></h2>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
<li><a class="reference" href="IncrementableIterator.html"><em>Incrementable Iterator</em></a></li>
|
<li><a class="reference" href="IncrementableIterator.html"><em>Incrementable Iterator</em></a></li>
|
||||||
<li><a class="reference" href="SinglePassIterator.html"><em>Single Pass Iterator</em></a></li>
|
<li><a class="reference" href="SinglePassIterator.html"><em>Single Pass Iterator</em></a></li>
|
||||||
@ -350,8 +65,8 @@ the documentation for the <a class="reference" href="../../concept_check/index.h
|
|||||||
<li><a class="reference" href="RandomAccessTraversal.html"><em>Random Access Traversal</em></a></li>
|
<li><a class="reference" href="RandomAccessTraversal.html"><em>Random Access Traversal</em></a></li>
|
||||||
</ul>
|
</ul>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="iterator-concepts-hpp-synopsis">
|
||||||
<h2><a id="iterator-concepts-hpp-synopsis" name="iterator-concepts-hpp-synopsis"><tt class="docutils literal"><span class="pre">iterator_concepts.hpp</span></tt> Synopsis</a></h2>
|
<h2><a name="iterator-concepts-hpp-synopsis"><tt class="literal"><span class="pre">iterator_concepts.hpp</span></tt> Synopsis</a></h2>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
namespace boost_concepts {
|
namespace boost_concepts {
|
||||||
|
|
||||||
@ -399,5 +114,10 @@ namespace boost_concepts {
|
|||||||
</div>
|
</div>
|
||||||
</div>
|
</div>
|
||||||
</div>
|
</div>
|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="iterator_concepts.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
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|
||||||
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|
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|
||||||
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|
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|
||||||
|
|||||||
Binary file not shown.
@ -1,6 +1,4 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
++++++++++++++++++
|
++++++++++++++++++
|
||||||
Iterator Concepts
|
Iterator Concepts
|
||||||
|
|||||||
File diff suppressed because it is too large
Load Diff
Binary file not shown.
@ -1,7 +1,3 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
++++++++++++++++
|
++++++++++++++++
|
||||||
Iterator Facade
|
Iterator Facade
|
||||||
++++++++++++++++
|
++++++++++++++++
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
``iterator_facade`` is a base class template that implements the
|
``iterator_facade`` is a base class template that implements the
|
||||||
interface of standard iterators in terms of a few core functions
|
interface of standard iterators in terms of a few core functions
|
||||||
and associated types, to be supplied by a derived iterator class.
|
and associated types, to be supplied by a derived iterator class.
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
.. Version 1.1 of this ReStructuredText document corresponds to
|
.. Version 1.1 of this ReStructuredText document corresponds to
|
||||||
n1530_, the paper accepted by the LWG for TR1.
|
n1530_, the paper accepted by the LWG for TR1.
|
||||||
|
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
.. Version 1.3 of this ReStructuredText document corresponds to
|
.. Version 1.3 of this ReStructuredText document corresponds to
|
||||||
n1530_, the paper accepted by the LWG for TR1.
|
n1530_, the paper accepted by the LWG for TR1.
|
||||||
|
|
||||||
|
|||||||
@ -299,7 +299,7 @@ changes:
|
|||||||
|
|
||||||
class const_node_iterator
|
class const_node_iterator
|
||||||
: public boost::iterator_facade<
|
: public boost::iterator_facade<
|
||||||
const_node_iterator
|
node_iterator
|
||||||
, node_base **const**
|
, node_base **const**
|
||||||
, boost::forward_traversal_tag
|
, boost::forward_traversal_tag
|
||||||
>
|
>
|
||||||
|
|||||||
@ -3,298 +3,15 @@
|
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|
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|
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|
<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
|
||||||
<title>Iterator Traits</title>
|
<title>Iterator Traits</title>
|
||||||
<meta name="author" content="David Abrahams" />
|
<meta name="author" content="David Abrahams" />
|
||||||
<meta name="organization" content="Boost Consulting" />
|
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|
||||||
<meta name="date" content="2004-11-01" />
|
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|
||||||
<meta name="copyright" content="Copyright David Abrahams 2004." />
|
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|
||||||
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|
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|
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|
|
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font-weight: bold ;
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|
||||||
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|
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/* Uncomment (and remove this text!) to get reduced vertical space in
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|
||||||
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|
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|
||||||
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|
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|
||||||
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|
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|
|
||||||
*/
|
|
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|
|
||||||
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|
|
||||||
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|
||||||
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|
||||||
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|
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|
|
||||||
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|
|
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|
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|
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|
|
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|
|
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|
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|
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|
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|
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|
|
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|
|
||||||
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|
|
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|
|
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|
|
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|
|
||||||
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|
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|
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|
|
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|
||||||
div.sidebar {
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|
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|
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border: medium outset ;
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|
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padding: 1em ;
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|
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|
|
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|
|
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|
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||||||
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||||||
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||||||
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||||||
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||||||
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||||||
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|
||||||
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|
|
||||||
/* font-size relative to parent (h1..h6 element) */
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||||||
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||||||
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||||||
table.citation {
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|
||||||
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||||||
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|
||||||
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||||||
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||||||
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|
||||||
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||||||
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||||||
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||||||
table.footnote {
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|
||||||
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||||||
table.docutils td, table.docutils th,
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||||||
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||||||
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||||||
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|
|
||||||
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|
||||||
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|
||||||
table.docutils th.field-name, table.docinfo th.docinfo-name {
|
|
||||||
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||||||
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|
||||||
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|
||||||
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|
||||||
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|
||||||
h1 tt.docutils, h2 tt.docutils, h3 tt.docutils,
|
|
||||||
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|
|
||||||
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||||||
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|
||||||
tt.docutils {
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|
||||||
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||||||
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|
||||||
ul.auto-toc {
|
|
||||||
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|
||||||
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|
||||||
</style>
|
|
||||||
</head>
|
</head>
|
||||||
<body>
|
<body>
|
||||||
<div class="document" id="iterator-traits">
|
|
||||||
<h1 class="title">Iterator Traits</h1>
|
<h1 class="title">Iterator Traits</h1>
|
||||||
<table class="docinfo" frame="void" rules="none">
|
<table class="docinfo" frame="void" rules="none">
|
||||||
<col class="docinfo-name" />
|
<col class="docinfo-name" />
|
||||||
@ -312,31 +29,29 @@ ul.auto-toc {
|
|||||||
<td>Copyright David Abrahams 2004.</td></tr>
|
<td>Copyright David Abrahams 2004.</td></tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<!-- Distributed under the Boost -->
|
<div class="document" id="iterator-traits">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<table class="field-list" frame="void" rules="none">
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body">Header <tt class="docutils literal"><span class="pre"><boost/iterator/iterator_traits.hpp></span></tt> provides
|
<tr class="field"><th class="field-name">abstract:</th><td class="field-body">Header <tt class="literal"><span class="pre"><boost/iterator/iterator_traits.hpp></span></tt> provides
|
||||||
the ability to access an iterator's associated types using
|
the ability to access an iterator's associated types using
|
||||||
MPL-compatible <a class="reference" href="../../mpl/doc/index.html#metafunctions">metafunctions</a>.</td>
|
MPL-compatible <a class="reference" href="../../mpl/doc/index.html#metafunctions">metafunctions</a>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<div class="section">
|
<div class="section" id="overview">
|
||||||
<h1><a id="overview" name="overview">Overview</a></h1>
|
<h1><a name="overview">Overview</a></h1>
|
||||||
<p><tt class="docutils literal"><span class="pre">std::iterator_traits</span></tt> provides access to five associated types
|
<p><tt class="literal"><span class="pre">std::iterator_traits</span></tt> provides access to five associated types
|
||||||
of any iterator: its <tt class="docutils literal"><span class="pre">value_type</span></tt>, <tt class="docutils literal"><span class="pre">reference</span></tt>, <tt class="docutils literal"><span class="pre">pointer</span></tt>,
|
of any iterator: its <tt class="literal"><span class="pre">value_type</span></tt>, <tt class="literal"><span class="pre">reference</span></tt>, <tt class="literal"><span class="pre">pointer</span></tt>,
|
||||||
<tt class="docutils literal"><span class="pre">iterator_category</span></tt>, and <tt class="docutils literal"><span class="pre">difference_type</span></tt>. Unfortunately,
|
<tt class="literal"><span class="pre">iterator_category</span></tt>, and <tt class="literal"><span class="pre">difference_type</span></tt>. Unfortunately,
|
||||||
such a "multi-valued" traits template can be difficult to use in a
|
such a "multi-valued" traits template can be difficult to use in a
|
||||||
metaprogramming context. <tt class="docutils literal"><span class="pre"><boost/iterator/iterator_traits.hpp></span></tt>
|
metaprogramming context. <tt class="literal"><span class="pre"><boost/iterator/iterator_traits.hpp></span></tt>
|
||||||
provides access to these types using a standard <a class="reference" href="../../mpl/doc/index.html#metafunctions">metafunctions</a>.</p>
|
provides access to these types using a standard <a class="reference" href="../../mpl/doc/index.html#metafunctions">metafunctions</a>.</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="summary">
|
||||||
<h1><a id="summary" name="summary">Summary</a></h1>
|
<h1><a name="summary">Summary</a></h1>
|
||||||
<p>Header <tt class="docutils literal"><span class="pre"><boost/iterator/iterator_traits.hpp></span></tt>:</p>
|
<p>Header <tt class="literal"><span class="pre"><boost/iterator/iterator_traits.hpp></span></tt>:</p>
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
template <class Iterator>
|
template <class Iterator>
|
||||||
struct iterator_value
|
struct iterator_value
|
||||||
@ -380,21 +95,26 @@ struct iterator_category
|
|||||||
};
|
};
|
||||||
</pre>
|
</pre>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="broken-compiler-notes">
|
||||||
<h1><a id="broken-compiler-notes" name="broken-compiler-notes">Broken Compiler Notes</a></h1>
|
<h1><a name="broken-compiler-notes">Broken Compiler Notes</a></h1>
|
||||||
<p>Because of workarounds in Boost, you may find that these
|
<p>Because of workarounds in Boost, you may find that these
|
||||||
<a class="reference" href="../../mpl/doc/index.html#metafunctions">metafunctions</a> actually work better than the facilities provided by
|
<a class="reference" href="../../mpl/doc/index.html#metafunctions">metafunctions</a> actually work better than the facilities provided by
|
||||||
your compiler's standard library.</p>
|
your compiler's standard library.</p>
|
||||||
<p>On compilers that don't support partial specialization, such as
|
<p>On compilers that don't support partial specialization, such as
|
||||||
Microsoft Visual C++ 6.0 or 7.0, you may need to manually invoke
|
Microsoft Visual C++ 6.0 or 7.0, you may need to manually invoke
|
||||||
<a class="reference" href="../../type_traits/index.html#transformations">BOOST_BROKEN_COMPILER_TYPE_TRAITS_SPECIALIZATION</a> on the
|
<a class="reference" href="../../type_traits/index.html#transformations">BOOST_BROKEN_COMPILER_TYPE_TRAITS_SPECIALIZATION</a> on the
|
||||||
<tt class="docutils literal"><span class="pre">value_type</span></tt> of pointers that are passed to these metafunctions.</p>
|
<tt class="literal"><span class="pre">value_type</span></tt> of pointers that are passed to these metafunctions.</p>
|
||||||
<p>Because of bugs in the implementation of GCC-2.9x, the name of
|
<p>Because of bugs in the implementation of GCC-2.9x, the name of
|
||||||
<tt class="docutils literal"><span class="pre">iterator_category</span></tt> is changed to <tt class="docutils literal"><span class="pre">iterator_category_</span></tt> on that
|
<tt class="literal"><span class="pre">iterator_category</span></tt> is changed to <tt class="literal"><span class="pre">iterator_category_</span></tt> on that
|
||||||
compiler. A macro, <tt class="docutils literal"><span class="pre">BOOST_ITERATOR_CATEGORY</span></tt>, that expands to
|
compiler. A macro, <tt class="literal"><span class="pre">BOOST_ITERATOR_CATEGORY</span></tt>, that expands to
|
||||||
either <tt class="docutils literal"><span class="pre">iterator_category</span></tt> or <tt class="docutils literal"><span class="pre">iterator_category_</span></tt>, as
|
either <tt class="literal"><span class="pre">iterator_category</span></tt> or <tt class="literal"><span class="pre">iterator_category_</span></tt>, as
|
||||||
appropriate to the platform, is provided for portability.</p>
|
appropriate to the platform, is provided for portability.</p>
|
||||||
</div>
|
</div>
|
||||||
</div>
|
</div>
|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="iterator_traits.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
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|
||||||
</body>
|
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|
||||||
</html>
|
</html>
|
||||||
|
|||||||
Binary file not shown.
@ -1,7 +1,3 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
+++++++++++++++++
|
+++++++++++++++++
|
||||||
Iterator Traits
|
Iterator Traits
|
||||||
+++++++++++++++++
|
+++++++++++++++++
|
||||||
|
|||||||
@ -1,6 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
::
|
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|
||||||
|
|
||||||
|
|||||||
45
doc/make_filter_iterator.html
Executable file
45
doc/make_filter_iterator.html
Executable file
@ -0,0 +1,45 @@
|
|||||||
|
<?xml version="1.0" encoding="utf-8" ?>
|
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|
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|
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|
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|
||||||
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|
||||||
|
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|
||||||
|
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|
||||||
|
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|
||||||
|
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|
||||||
|
<div class="document">
|
||||||
|
<pre class="literal-block">
|
||||||
|
template <class Predicate, class Iterator>
|
||||||
|
filter_iterator<Predicate,Iterator>
|
||||||
|
make_filter_iterator(Predicate f, Iterator x, Iterator end = Iterator());
|
||||||
|
</pre>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
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|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">filter_iterator<Predicate,Iterator>(f, x, end)</td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
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|
||||||
|
<pre class="literal-block">
|
||||||
|
template <class Predicate, class Iterator>
|
||||||
|
filter_iterator<Predicate,Iterator>
|
||||||
|
make_filter_iterator(Iterator x, Iterator end = Iterator());
|
||||||
|
</pre>
|
||||||
|
<table class="field-list" frame="void" rules="none">
|
||||||
|
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|
||||||
|
<col class="field-body" />
|
||||||
|
<tbody valign="top">
|
||||||
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">filter_iterator<Predicate,Iterator>(x, end)</td>
|
||||||
|
</tr>
|
||||||
|
</tbody>
|
||||||
|
</table>
|
||||||
|
</div>
|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="make_filter_iterator.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
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|
||||||
|
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|
||||||
|
</html>
|
||||||
@ -1,6 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
::
|
::
|
||||||
|
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
::
|
::
|
||||||
|
|
||||||
template <class BidirectionalIterator>
|
template <class BidirectionalIterator>
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
::
|
::
|
||||||
|
|
||||||
template <class UnaryFunction, class Iterator>
|
template <class UnaryFunction, class Iterator>
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
::
|
::
|
||||||
|
|
||||||
template<typename IteratorTuple>
|
template<typename IteratorTuple>
|
||||||
|
|||||||
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@ -1,7 +1,3 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
++++++++++++++++++++++
|
++++++++++++++++++++++
|
||||||
New Iterator Concepts
|
New Iterator Concepts
|
||||||
++++++++++++++++++++++
|
++++++++++++++++++++++
|
||||||
@ -496,30 +492,26 @@ concept if the following expressions are valid and respect the stated
|
|||||||
semantics.
|
semantics.
|
||||||
|
|
||||||
|
|
||||||
+----------------------------------------------------------------------------------------------------------------+
|
+--------------------------------------------------------------------------------------------------------+
|
||||||
|Single Pass Iterator Requirements (in addition to Incrementable Iterator and Equality Comparable) |
|
|Single Pass Iterator Requirements (in addition to Incrementable Iterator and Equality |
|
||||||
| |
|
|Comparable) |
|
||||||
+----------------------------------------+-----------------------------+-------------+---------------------------+
|
+--------------------------------+-----------------------------+-------------+---------------------------+
|
||||||
|Expression |Return Type | Operational |Assertion/ |
|
|Expression |Return Type | Operational |Assertion/ |
|
||||||
| | | Semantics |Pre-/Post-condition |
|
| | | Semantics |Pre-/Post-condition |
|
||||||
+========================================+=============================+=============+===========================+
|
+================================+=============================+=============+===========================+
|
||||||
|``++r`` |``X&`` | |pre: ``r`` is |
|
|``++r`` |``X&`` | |pre: ``r`` is |
|
||||||
| | | |dereferenceable; post: |
|
| | | |dereferenceable; post: |
|
||||||
| | | |``r`` is dereferenceable or|
|
| | | |``r`` is dereferenceable or|
|
||||||
| | | |``r`` is past-the-end |
|
| | | |``r`` is past-the-end |
|
||||||
+----------------------------------------+-----------------------------+-------------+---------------------------+
|
+--------------------------------+-----------------------------+-------------+---------------------------+
|
||||||
|``a == b`` |convertible to ``bool`` | |``==`` is an equivalence |
|
|``a == b`` |convertible to ``bool`` | |``==`` is an equivalence |
|
||||||
| | | |relation over its domain |
|
| | | |relation over its domain |
|
||||||
+----------------------------------------+-----------------------------+-------------+---------------------------+
|
+--------------------------------+-----------------------------+-------------+---------------------------+
|
||||||
|``a != b`` |convertible to ``bool`` |``!(a == b)``| |
|
|``a != b`` |convertible to ``bool`` |``!(a == b)``| |
|
||||||
+----------------------------------------+-----------------------------+-------------+---------------------------+
|
+--------------------------------+-----------------------------+-------------+---------------------------+
|
||||||
|``iterator_traits<X>::difference_type`` |A signed integral type | | |
|
|
||||||
| |representing the distance | | |
|
|
||||||
| |between iterators | | |
|
|
||||||
+----------------------------------------+-----------------------------+-------------+---------------------------+
|
|
||||||
|``iterator_traversal<X>::type`` |Convertible to | | |
|
|``iterator_traversal<X>::type`` |Convertible to | | |
|
||||||
| |``single_pass_traversal_tag``| | |
|
| |``single_pass_traversal_tag``| | |
|
||||||
+----------------------------------------+-----------------------------+-------------+---------------------------+
|
+--------------------------------+-----------------------------+-------------+---------------------------+
|
||||||
|
|
||||||
.. TR1: single_pass_iterator_tag changed to
|
.. TR1: single_pass_iterator_tag changed to
|
||||||
single_pass_traversal_tag for consistency
|
single_pass_traversal_tag for consistency
|
||||||
@ -545,6 +537,10 @@ valid and respect the stated semantics.
|
|||||||
| | |dereferenceable implies |
|
| | |dereferenceable implies |
|
||||||
| | |``++r == ++s.`` |
|
| | |``++r == ++s.`` |
|
||||||
+---------------------------------------+-----------------------------------+----------------------------+
|
+---------------------------------------+-----------------------------------+----------------------------+
|
||||||
|
|``iterator_traits<X>::difference_type``|A signed integral type representing| |
|
||||||
|
| |the distance between iterators | |
|
||||||
|
| | | |
|
||||||
|
+---------------------------------------+-----------------------------------+----------------------------+
|
||||||
|``iterator_traversal<X>::type`` |Convertible to | |
|
|``iterator_traversal<X>::type`` |Convertible to | |
|
||||||
| |``forward_traversal_tag`` | |
|
| |``forward_traversal_tag`` | |
|
||||||
+---------------------------------------+-----------------------------------+----------------------------+
|
+---------------------------------------+-----------------------------------+----------------------------+
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
The permutation iterator adaptor provides a permuted view of a given
|
The permutation iterator adaptor provides a permuted view of a given
|
||||||
range. That is, the view includes every element of the given range but
|
range. That is, the view includes every element of the given range but
|
||||||
in a potentially different order.
|
in a potentially different order.
|
||||||
|
|||||||
@ -3,298 +3,15 @@
|
|||||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||||||
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|
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|
||||||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||||||
<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
|
||||||
<title>Permutation Iterator</title>
|
<title>Permutation Iterator</title>
|
||||||
<meta name="author" content="Toon Knapen, David Abrahams, Roland Richter, Jeremy Siek" />
|
<meta name="author" content="Toon Knapen, David Abrahams, Roland Richter, Jeremy Siek" />
|
||||||
<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab" />
|
<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab" />
|
||||||
<meta name="date" content="2004-11-01" />
|
<meta name="date" content="2004-11-01" />
|
||||||
<meta name="copyright" content="Copyright Toon Knapen, David Abrahams, Roland Richter, and Jeremy Siek 2003." />
|
<meta name="copyright" content="Copyright Toon Knapen, David Abrahams, Roland Richter, and Jeremy Siek 2003." />
|
||||||
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|
<link rel="stylesheet" href="default.css" type="text/css" />
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
:Contact: goodger@users.sourceforge.net
|
|
||||||
:Date: $Date$
|
|
||||||
:Revision: $Revision$
|
|
||||||
:Copyright: This stylesheet has been placed in the public domain.
|
|
||||||
|
|
||||||
Default cascading style sheet for the HTML output of Docutils.
|
|
||||||
|
|
||||||
See http://docutils.sf.net/docs/howto/html-stylesheets.html for how to
|
|
||||||
customize this style sheet.
|
|
||||||
*/
|
|
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|
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/* used to remove borders from tables and images */
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|
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padding: 0 0.5em 0 0 ! important }
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|
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/* Uncomment (and remove this text!) to get reduced vertical space in
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||||||
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|
||||||
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|
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|
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|
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|
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|
|
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|
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|
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|
|
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|
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|
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|
||||||
div.dedication p.topic-title {
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margin: 5em }
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color: red }
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border: medium outset ;
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padding: 1em }
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div.system-message p.system-message-title {
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color: red ;
|
|
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font-weight: bold }
|
|
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|
|
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div.topic {
|
|
||||||
margin: 2em }
|
|
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|
|
||||||
h1.section-subtitle, h2.section-subtitle, h3.section-subtitle,
|
|
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|
|
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margin-top: 0.4em }
|
|
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|
|
||||||
h1.title {
|
|
||||||
text-align: center }
|
|
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|
|
||||||
h2.subtitle {
|
|
||||||
text-align: center }
|
|
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|
|
||||||
hr.docutils {
|
|
||||||
width: 75% }
|
|
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|
|
||||||
img.align-left {
|
|
||||||
clear: left }
|
|
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|
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|
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clear: right }
|
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|
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|
||||||
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|
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|
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|
|
||||||
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|
|
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|
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|
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|
|
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p.attribution {
|
|
||||||
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|
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|
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|
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|
|
||||||
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|
|
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|
||||||
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|
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|
|
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|
||||||
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|
|
||||||
white-space: nowrap }
|
|
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|
||||||
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|
|
||||||
font-weight: bold ;
|
|
||||||
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|
|
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|
|
||||||
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|
|
||||||
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|
||||||
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|
||||||
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|
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|
||||||
|
|
||||||
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|
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|
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|
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|
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|
||||||
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|
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|
|
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|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
table.docinfo {
|
|
||||||
margin: 2em 4em }
|
|
||||||
|
|
||||||
table.docutils {
|
|
||||||
margin-top: 0.5em ;
|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
h1 tt.docutils, h2 tt.docutils, h3 tt.docutils,
|
|
||||||
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|
|
||||||
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|
|
||||||
|
|
||||||
tt.docutils {
|
|
||||||
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|
|
||||||
|
|
||||||
ul.auto-toc {
|
|
||||||
list-style-type: none }
|
|
||||||
|
|
||||||
</style>
|
|
||||||
</head>
|
</head>
|
||||||
<body>
|
<body>
|
||||||
<div class="document" id="permutation-iterator">
|
|
||||||
<h1 class="title">Permutation Iterator</h1>
|
<h1 class="title">Permutation Iterator</h1>
|
||||||
<table class="docinfo" frame="void" rules="none">
|
<table class="docinfo" frame="void" rules="none">
|
||||||
<col class="docinfo-name" />
|
<col class="docinfo-name" />
|
||||||
@ -313,40 +30,32 @@ Lab</a></td></tr>
|
|||||||
<td>Copyright Toon Knapen, David Abrahams, Roland Richter, and Jeremy Siek 2003.</td></tr>
|
<td>Copyright Toon Knapen, David Abrahams, Roland Richter, and Jeremy Siek 2003.</td></tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<!-- Distributed under the Boost -->
|
<div class="document" id="permutation-iterator">
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
<table class="field-list" frame="void" rules="none">
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
<tr class="field"><th class="field-name">abstract:</th><td class="field-body">The permutation iterator adaptor provides a permuted view of a given
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
The permutation iterator adaptor provides a permuted view of a given
|
|
||||||
range. That is, the view includes every element of the given range but
|
range. That is, the view includes every element of the given range but
|
||||||
in a potentially different order.</td>
|
in a potentially different order.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<div class="contents topic">
|
<div class="contents topic" id="table-of-contents">
|
||||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
<li><a class="reference" href="#introduction" id="id2" name="id2">Introduction</a></li>
|
<li><a class="reference" href="#introduction" id="id2" name="id2">Introduction</a></li>
|
||||||
<li><a class="reference" href="#reference" id="id3" name="id3">Reference</a><ul>
|
<li><a class="reference" href="#reference" id="id3" name="id3">Reference</a><ul>
|
||||||
<li><a class="reference" href="#permutation-iterator-requirements" id="id4" name="id4"><tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> requirements</a></li>
|
<li><a class="reference" href="#permutation-iterator-requirements" id="id4" name="id4"><tt class="literal"><span class="pre">permutation_iterator</span></tt> requirements</a></li>
|
||||||
<li><a class="reference" href="#permutation-iterator-models" id="id5" name="id5"><tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> models</a></li>
|
<li><a class="reference" href="#permutation-iterator-models" id="id5" name="id5"><tt class="literal"><span class="pre">permutation_iterator</span></tt> models</a></li>
|
||||||
<li><a class="reference" href="#permutation-iterator-operations" id="id6" name="id6"><tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> operations</a></li>
|
<li><a class="reference" href="#permutation-iterator-operations" id="id6" name="id6"><tt class="literal"><span class="pre">permutation_iterator</span></tt> operations</a></li>
|
||||||
</ul>
|
</ul>
|
||||||
</li>
|
</li>
|
||||||
<li><a class="reference" href="#example" id="id7" name="id7">Example</a></li>
|
<li><a class="reference" href="#example" id="id7" name="id7">Example</a></li>
|
||||||
</ul>
|
</ul>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="introduction">
|
||||||
<h1><a class="toc-backref" href="#id2" id="introduction" name="introduction">Introduction</a></h1>
|
<h1><a class="toc-backref" href="#id2" name="introduction">Introduction</a></h1>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<p>The adaptor takes two arguments:</p>
|
<p>The adaptor takes two arguments:</p>
|
||||||
<blockquote>
|
<blockquote>
|
||||||
<ul class="simple">
|
<ul class="simple">
|
||||||
@ -365,11 +74,8 @@ to be unique. In this same context, it must be noted that the past the
|
|||||||
end permutation iterator is completely defined by means of the
|
end permutation iterator is completely defined by means of the
|
||||||
past-the-end iterator to the indices.</p>
|
past-the-end iterator to the indices.</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="reference">
|
||||||
<h1><a class="toc-backref" href="#id3" id="reference" name="reference">Reference</a></h1>
|
<h1><a class="toc-backref" href="#id3" name="reference">Reference</a></h1>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
template< class ElementIterator
|
template< class ElementIterator
|
||||||
, class IndexIterator
|
, class IndexIterator
|
||||||
@ -401,55 +107,55 @@ template <class ElementIterator, class IndexIterator>
|
|||||||
permutation_iterator<ElementIterator, IndexIterator>
|
permutation_iterator<ElementIterator, IndexIterator>
|
||||||
make_permutation_iterator( ElementIterator e, IndexIterator i);
|
make_permutation_iterator( ElementIterator e, IndexIterator i);
|
||||||
</pre>
|
</pre>
|
||||||
<div class="section">
|
<div class="section" id="permutation-iterator-requirements">
|
||||||
<h2><a class="toc-backref" href="#id4" id="permutation-iterator-requirements" name="permutation-iterator-requirements"><tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> requirements</a></h2>
|
<h2><a class="toc-backref" href="#id4" name="permutation-iterator-requirements"><tt class="literal"><span class="pre">permutation_iterator</span></tt> requirements</a></h2>
|
||||||
<p><tt class="docutils literal"><span class="pre">ElementIterator</span></tt> shall model Random Access Traversal Iterator.
|
<p><tt class="literal"><span class="pre">ElementIterator</span></tt> shall model Random Access Traversal Iterator.
|
||||||
<tt class="docutils literal"><span class="pre">IndexIterator</span></tt> shall model Readable Iterator. The value type of
|
<tt class="literal"><span class="pre">IndexIterator</span></tt> shall model Readable Iterator. The value type of
|
||||||
the <tt class="docutils literal"><span class="pre">IndexIterator</span></tt> must be convertible to the difference type of
|
the <tt class="literal"><span class="pre">IndexIterator</span></tt> must be convertible to the difference type of
|
||||||
<tt class="docutils literal"><span class="pre">ElementIterator</span></tt>.</p>
|
<tt class="literal"><span class="pre">ElementIterator</span></tt>.</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="permutation-iterator-models">
|
||||||
<h2><a class="toc-backref" href="#id5" id="permutation-iterator-models" name="permutation-iterator-models"><tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> models</a></h2>
|
<h2><a class="toc-backref" href="#id5" name="permutation-iterator-models"><tt class="literal"><span class="pre">permutation_iterator</span></tt> models</a></h2>
|
||||||
<p><tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> models the same iterator traversal concepts
|
<p><tt class="literal"><span class="pre">permutation_iterator</span></tt> models the same iterator traversal concepts
|
||||||
as <tt class="docutils literal"><span class="pre">IndexIterator</span></tt> and the same iterator access concepts as
|
as <tt class="literal"><span class="pre">IndexIterator</span></tt> and the same iterator access concepts as
|
||||||
<tt class="docutils literal"><span class="pre">ElementIterator</span></tt>.</p>
|
<tt class="literal"><span class="pre">ElementIterator</span></tt>.</p>
|
||||||
<p>If <tt class="docutils literal"><span class="pre">IndexIterator</span></tt> models Single Pass Iterator and
|
<p>If <tt class="literal"><span class="pre">IndexIterator</span></tt> models Single Pass Iterator and
|
||||||
<tt class="docutils literal"><span class="pre">ElementIterator</span></tt> models Readable Iterator then
|
<tt class="literal"><span class="pre">ElementIterator</span></tt> models Readable Iterator then
|
||||||
<tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> models Input Iterator.</p>
|
<tt class="literal"><span class="pre">permutation_iterator</span></tt> models Input Iterator.</p>
|
||||||
<p>If <tt class="docutils literal"><span class="pre">IndexIterator</span></tt> models Forward Traversal Iterator and
|
<p>If <tt class="literal"><span class="pre">IndexIterator</span></tt> models Forward Traversal Iterator and
|
||||||
<tt class="docutils literal"><span class="pre">ElementIterator</span></tt> models Readable Lvalue Iterator then
|
<tt class="literal"><span class="pre">ElementIterator</span></tt> models Readable Lvalue Iterator then
|
||||||
<tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> models Forward Iterator.</p>
|
<tt class="literal"><span class="pre">permutation_iterator</span></tt> models Forward Iterator.</p>
|
||||||
<p>If <tt class="docutils literal"><span class="pre">IndexIterator</span></tt> models Bidirectional Traversal Iterator and
|
<p>If <tt class="literal"><span class="pre">IndexIterator</span></tt> models Bidirectional Traversal Iterator and
|
||||||
<tt class="docutils literal"><span class="pre">ElementIterator</span></tt> models Readable Lvalue Iterator then
|
<tt class="literal"><span class="pre">ElementIterator</span></tt> models Readable Lvalue Iterator then
|
||||||
<tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> models Bidirectional Iterator.</p>
|
<tt class="literal"><span class="pre">permutation_iterator</span></tt> models Bidirectional Iterator.</p>
|
||||||
<p>If <tt class="docutils literal"><span class="pre">IndexIterator</span></tt> models Random Access Traversal Iterator and
|
<p>If <tt class="literal"><span class="pre">IndexIterator</span></tt> models Random Access Traversal Iterator and
|
||||||
<tt class="docutils literal"><span class="pre">ElementIterator</span></tt> models Readable Lvalue Iterator then
|
<tt class="literal"><span class="pre">ElementIterator</span></tt> models Readable Lvalue Iterator then
|
||||||
<tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> models Random Access Iterator.</p>
|
<tt class="literal"><span class="pre">permutation_iterator</span></tt> models Random Access Iterator.</p>
|
||||||
<p><tt class="docutils literal"><span class="pre">permutation_iterator<E1,</span> <span class="pre">X,</span> <span class="pre">V1,</span> <span class="pre">C2,</span> <span class="pre">R1,</span> <span class="pre">D1></span></tt> is interoperable
|
<p><tt class="literal"><span class="pre">permutation_iterator<E1,</span> <span class="pre">X,</span> <span class="pre">V1,</span> <span class="pre">C2,</span> <span class="pre">R1,</span> <span class="pre">D1></span></tt> is interoperable
|
||||||
with <tt class="docutils literal"><span class="pre">permutation_iterator<E2,</span> <span class="pre">Y,</span> <span class="pre">V2,</span> <span class="pre">C2,</span> <span class="pre">R2,</span> <span class="pre">D2></span></tt> if and only if
|
with <tt class="literal"><span class="pre">permutation_iterator<E2,</span> <span class="pre">Y,</span> <span class="pre">V2,</span> <span class="pre">C2,</span> <span class="pre">R2,</span> <span class="pre">D2></span></tt> if and only if
|
||||||
<tt class="docutils literal"><span class="pre">X</span></tt> is interoperable with <tt class="docutils literal"><span class="pre">Y</span></tt> and <tt class="docutils literal"><span class="pre">E1</span></tt> is convertible
|
<tt class="literal"><span class="pre">X</span></tt> is interoperable with <tt class="literal"><span class="pre">Y</span></tt> and <tt class="literal"><span class="pre">E1</span></tt> is convertible
|
||||||
to <tt class="docutils literal"><span class="pre">E2</span></tt>.</p>
|
to <tt class="literal"><span class="pre">E2</span></tt>.</p>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="permutation-iterator-operations">
|
||||||
<h2><a class="toc-backref" href="#id6" id="permutation-iterator-operations" name="permutation-iterator-operations"><tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> operations</a></h2>
|
<h2><a class="toc-backref" href="#id6" name="permutation-iterator-operations"><tt class="literal"><span class="pre">permutation_iterator</span></tt> operations</a></h2>
|
||||||
<p>In addition to those operations required by the concepts that
|
<p>In addition to those operations required by the concepts that
|
||||||
<tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> models, <tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> provides the
|
<tt class="literal"><span class="pre">permutation_iterator</span></tt> models, <tt class="literal"><span class="pre">permutation_iterator</span></tt> provides the
|
||||||
following operations.</p>
|
following operations.</p>
|
||||||
<p><tt class="docutils literal"><span class="pre">permutation_iterator();</span></tt></p>
|
<p><tt class="literal"><span class="pre">permutation_iterator();</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Default constructs <tt class="docutils literal"><span class="pre">m_elt</span></tt> and <tt class="docutils literal"><span class="pre">m_order</span></tt>.</td>
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Default constructs <tt class="literal"><span class="pre">m_elt</span></tt> and <tt class="literal"><span class="pre">m_order</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">explicit</span> <span class="pre">permutation_iterator(ElementIterator</span> <span class="pre">x,</span> <span class="pre">IndexIterator</span> <span class="pre">y);</span></tt></p>
|
<p><tt class="literal"><span class="pre">explicit</span> <span class="pre">permutation_iterator(ElementIterator</span> <span class="pre">x,</span> <span class="pre">IndexIterator</span> <span class="pre">y);</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs <tt class="docutils literal"><span class="pre">m_elt</span></tt> from <tt class="docutils literal"><span class="pre">x</span></tt> and <tt class="docutils literal"><span class="pre">m_order</span></tt> from <tt class="docutils literal"><span class="pre">y</span></tt>.</td>
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs <tt class="literal"><span class="pre">m_elt</span></tt> from <tt class="literal"><span class="pre">x</span></tt> and <tt class="literal"><span class="pre">m_order</span></tt> from <tt class="literal"><span class="pre">y</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
@ -461,41 +167,41 @@ permutation_iterator(
|
|||||||
, typename enable_if_convertible<OIIter, IndexIterator>::type* = 0
|
, typename enable_if_convertible<OIIter, IndexIterator>::type* = 0
|
||||||
);
|
);
|
||||||
</pre>
|
</pre>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs <tt class="docutils literal"><span class="pre">m_elt</span></tt> from <tt class="docutils literal"><span class="pre">r.m_elt</span></tt> and
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs <tt class="literal"><span class="pre">m_elt</span></tt> from <tt class="literal"><span class="pre">r.m_elt</span></tt> and
|
||||||
<tt class="docutils literal"><span class="pre">m_order</span></tt> from <tt class="docutils literal"><span class="pre">y.m_order</span></tt>.</td>
|
<tt class="literal"><span class="pre">m_order</span></tt> from <tt class="literal"><span class="pre">y.m_order</span></tt>.</td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">reference</span> <span class="pre">operator*()</span> <span class="pre">const;</span></tt></p>
|
<p><tt class="literal"><span class="pre">reference</span> <span class="pre">operator*()</span> <span class="pre">const;</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">*(m_elt</span> <span class="pre">+</span> <span class="pre">*m_order)</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*(m_elt</span> <span class="pre">+</span> <span class="pre">*m_order)</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">permutation_iterator&</span> <span class="pre">operator++();</span></tt></p>
|
<p><tt class="literal"><span class="pre">permutation_iterator&</span> <span class="pre">operator++();</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="docutils literal"><span class="pre">++m_order</span></tt></td>
|
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="literal"><span class="pre">++m_order</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">*this</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*this</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
<p><tt class="docutils literal"><span class="pre">ElementIterator</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
<p><tt class="literal"><span class="pre">ElementIterator</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">m_order</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_order</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
@ -504,21 +210,18 @@ template <class ElementIterator, class IndexIterator>
|
|||||||
permutation_iterator<ElementIterator, IndexIterator>
|
permutation_iterator<ElementIterator, IndexIterator>
|
||||||
make_permutation_iterator(ElementIterator e, IndexIterator i);
|
make_permutation_iterator(ElementIterator e, IndexIterator i);
|
||||||
</pre>
|
</pre>
|
||||||
<table class="docutils field-list" frame="void" rules="none">
|
<table class="field-list" frame="void" rules="none">
|
||||||
<col class="field-name" />
|
<col class="field-name" />
|
||||||
<col class="field-body" />
|
<col class="field-body" />
|
||||||
<tbody valign="top">
|
<tbody valign="top">
|
||||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">permutation_iterator<ElementIterator,</span> <span class="pre">IndexIterator>(e,</span> <span class="pre">i)</span></tt></td>
|
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">permutation_iterator<ElementIterator,</span> <span class="pre">IndexIterator>(e,</span> <span class="pre">i)</span></tt></td>
|
||||||
</tr>
|
</tr>
|
||||||
</tbody>
|
</tbody>
|
||||||
</table>
|
</table>
|
||||||
</div>
|
</div>
|
||||||
</div>
|
</div>
|
||||||
<div class="section">
|
<div class="section" id="example">
|
||||||
<h1><a class="toc-backref" href="#id7" id="example" name="example">Example</a></h1>
|
<h1><a class="toc-backref" href="#id7" name="example">Example</a></h1>
|
||||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
|
||||||
<!-- Software License, Version 1.0. (See accompanying -->
|
|
||||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
||||||
<pre class="literal-block">
|
<pre class="literal-block">
|
||||||
using namespace boost;
|
using namespace boost;
|
||||||
int i = 0;
|
int i = 0;
|
||||||
@ -583,5 +286,10 @@ Iterate backward with stride 2 : 6 8
|
|||||||
<p>The source code for this example can be found <a class="reference" href="../example/permutation_iter_example.cpp">here</a>.</p>
|
<p>The source code for this example can be found <a class="reference" href="../example/permutation_iter_example.cpp">here</a>.</p>
|
||||||
</div>
|
</div>
|
||||||
</div>
|
</div>
|
||||||
|
<hr class="footer" />
|
||||||
|
<div class="footer">
|
||||||
|
<a class="reference" href="permutation_iterator.rst">View document source</a>.
|
||||||
|
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||||
|
</div>
|
||||||
</body>
|
</body>
|
||||||
</html>
|
</html>
|
||||||
|
|||||||
Binary file not shown.
@ -1,7 +1,3 @@
|
|||||||
.. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
++++++++++++++++++++++
|
++++++++++++++++++++++
|
||||||
Permutation Iterator
|
Permutation Iterator
|
||||||
++++++++++++++++++++++
|
++++++++++++++++++++++
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
The adaptor takes two arguments:
|
The adaptor takes two arguments:
|
||||||
|
|
||||||
* an iterator to the range V on which the permutation
|
* an iterator to the range V on which the permutation
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
::
|
::
|
||||||
|
|
||||||
using namespace boost;
|
using namespace boost;
|
||||||
|
|||||||
@ -1,7 +1,3 @@
|
|||||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
|
||||||
.. Software License, Version 1.0. (See accompanying
|
|
||||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
||||||
|
|
||||||
.. parsed-literal::
|
.. parsed-literal::
|
||||||
|
|
||||||
template< class ElementIterator
|
template< class ElementIterator
|
||||||
|
|||||||
Some files were not shown because too many files have changed in this diff Show More
Reference in New Issue
Block a user