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fixed problem with V, C, R, D

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[SVN r21628]
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Jeremy Siek
2004-01-12 15:26:20 +00:00
parent ba8dc44eac
commit 0074f50573
9 changed files with 171 additions and 359 deletions
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doc/counting_iterator.html
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@ -3,7 +3,7 @@
<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 0.3.0: http://docutils.sourceforge.net/" />
<meta name="generator" content="Docutils 0.2.8: http://docutils.sourceforge.net/" />
<title>Counting Iterator</title>
<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" />
@ -208,5 +208,11 @@ indirectly printing out the numbers from 0 to 7
</pre>
</div>
</div>
<hr class="footer"/>
<div class="footer">
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Generated on: 2004-01-12 15:20 UTC.
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doc/facade-and-adaptor.html
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@ -56,82 +56,82 @@ by adapting other iterators.</td>
<div class="contents topic" id="table-of-contents">
<p class="topic-title"><a name="table-of-contents">Table of Contents</a></p>
<ul class="simple">
<li><a class="reference" href="#motivation" id="id13" name="id13">Motivation</a></li>
<li><a class="reference" href="#impact-on-the-standard" id="id14" name="id14">Impact on the Standard</a></li>
<li><a class="reference" href="#design" id="id15" name="id15">Design</a><ul>
<li><a class="reference" href="#iterator-concepts" id="id16" name="id16">Iterator Concepts</a></li>
<li><a class="reference" href="#interoperability" id="id17" name="id17">Interoperability</a></li>
<li><a class="reference" href="#iterator-facade" id="id18" name="id18">Iterator Facade</a><ul>
<li><a class="reference" href="#usage" id="id19" name="id19">Usage</a></li>
<li><a class="reference" href="#iterator-core-access" id="id20" name="id20">Iterator Core Access</a></li>
<li><a class="reference" href="#operator" id="id21" name="id21"><tt class="literal"><span class="pre">operator[]</span></tt></a></li>
<li><a class="reference" href="#id6" id="id22" name="id22"><tt class="literal"><span class="pre">operator-&gt;</span></tt></a></li>
<li><a class="reference" href="#motivation" id="id19" name="id19">Motivation</a></li>
<li><a class="reference" href="#impact-on-the-standard" id="id20" name="id20">Impact on the Standard</a></li>
<li><a class="reference" href="#design" id="id21" name="id21">Design</a><ul>
<li><a class="reference" href="#iterator-concepts" id="id22" name="id22">Iterator Concepts</a></li>
<li><a class="reference" href="#interoperability" id="id23" name="id23">Interoperability</a></li>
<li><a class="reference" href="#iterator-facade" id="id24" name="id24">Iterator Facade</a><ul>
<li><a class="reference" href="#usage" id="id25" name="id25">Usage</a></li>
<li><a class="reference" href="#iterator-core-access" id="id26" name="id26">Iterator Core Access</a></li>
<li><a class="reference" href="#operator" id="id27" name="id27"><tt class="literal"><span class="pre">operator[]</span></tt></a></li>
<li><a class="reference" href="#id6" id="id28" name="id28"><tt class="literal"><span class="pre">operator-&gt;</span></tt></a></li>
</ul>
</li>
<li><a class="reference" href="#iterator-adaptor" id="id23" name="id23">Iterator Adaptor</a></li>
<li><a class="reference" href="#specialized-adaptors" id="id24" name="id24">Specialized Adaptors</a></li>
<li><a class="reference" href="#iterator-adaptor" id="id29" name="id29">Iterator Adaptor</a></li>
<li><a class="reference" href="#specialized-adaptors" id="id30" name="id30">Specialized Adaptors</a></li>
</ul>
</li>
<li><a class="reference" href="#proposed-text" id="id25" name="id25">Proposed Text</a><ul>
<li><a class="reference" href="#header-iterator-helper-synopsis-lib-iterator-helper-synopsis" id="id26" name="id26">Header <tt class="literal"><span class="pre">&lt;iterator_helper&gt;</span></tt> synopsis [lib.iterator.helper.synopsis]</a></li>
<li><a class="reference" href="#iterator-facade-lib-iterator-facade" id="id27" name="id27">Iterator facade [lib.iterator.facade]</a><ul>
<li><a class="reference" href="#iterator-facade-usage" id="id28" name="id28"><tt class="literal"><span class="pre">iterator_facade</span></tt> usage</a><ul>
<li><a class="reference" href="#iterator-facade-core-operations" id="id29" name="id29"><tt class="literal"><span class="pre">iterator_facade</span></tt> Core Operations</a></li>
<li><a class="reference" href="#proposed-text" id="id31" name="id31">Proposed Text</a><ul>
<li><a class="reference" href="#header-iterator-helper-synopsis-lib-iterator-helper-synopsis" id="id32" name="id32">Header <tt class="literal"><span class="pre">&lt;iterator_helper&gt;</span></tt> synopsis [lib.iterator.helper.synopsis]</a></li>
<li><a class="reference" href="#iterator-facade-lib-iterator-facade" id="id33" name="id33">Iterator facade [lib.iterator.facade]</a><ul>
<li><a class="reference" href="#iterator-facade-usage" id="id34" name="id34"><tt class="literal"><span class="pre">iterator_facade</span></tt> usage</a><ul>
<li><a class="reference" href="#iterator-facade-core-operations" id="id35" name="id35"><tt class="literal"><span class="pre">iterator_facade</span></tt> Core Operations</a></li>
</ul>
</li>
<li><a class="reference" href="#iterator-facade-iterator-category" id="id30" name="id30"><tt class="literal"><span class="pre">iterator_facade</span></tt> iterator category</a></li>
<li><a class="reference" href="#iterator-facade-operations" id="id31" name="id31"><tt class="literal"><span class="pre">iterator_facade</span></tt> operations</a></li>
<li><a class="reference" href="#iterator-facade-iterator-category" id="id36" name="id36"><tt class="literal"><span class="pre">iterator_facade</span></tt> iterator category</a></li>
<li><a class="reference" href="#iterator-facade-operations" id="id37" name="id37"><tt class="literal"><span class="pre">iterator_facade</span></tt> operations</a></li>
</ul>
</li>
<li><a class="reference" href="#iterator-adaptor-lib-iterator-adaptor" id="id32" name="id32">Iterator adaptor [lib.iterator.adaptor]</a><ul>
<li><a class="reference" href="#iterator-adaptor-base-class-parameters" id="id33" name="id33"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> base class parameters</a></li>
<li><a class="reference" href="#iterator-adaptor-usage" id="id34" name="id34"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> usage</a></li>
<li><a class="reference" href="#iterator-adaptor-public-operations" id="id35" name="id35"><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="id36" name="id36"><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="id37" name="id37"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> private member functions</a></li>
<li><a class="reference" href="#iterator-adaptor-lib-iterator-adaptor" id="id38" name="id38">Iterator adaptor [lib.iterator.adaptor]</a><ul>
<li><a class="reference" href="#iterator-adaptor-base-class-parameters" id="id39" name="id39"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> base class parameters</a></li>
<li><a class="reference" href="#iterator-adaptor-usage" id="id40" name="id40"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> usage</a></li>
<li><a class="reference" href="#iterator-adaptor-public-operations" id="id41" name="id41"><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="id42" name="id42"><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="id43" name="id43"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> private member functions</a></li>
</ul>
</li>
<li><a class="reference" href="#specialized-adaptors-lib-iterator-special-adaptors" id="id38" name="id38">Specialized adaptors [lib.iterator.special.adaptors]</a><ul>
<li><a class="reference" href="#indirect-iterator" id="id39" name="id39">Indirect iterator</a><ul>
<li><a class="reference" href="#class-template-indirect-iterator" id="id40" name="id40">Class template <tt class="literal"><span class="pre">indirect_iterator</span></tt></a></li>
<li><a class="reference" href="#indirect-iterator-requirements" id="id41" name="id41"><tt class="literal"><span class="pre">indirect_iterator</span></tt> requirements</a></li>
<li><a class="reference" href="#indirect-iterator-models" id="id42" name="id42"><tt class="literal"><span class="pre">indirect_iterator</span></tt> models</a></li>
<li><a class="reference" href="#indirect-iterator-operations" id="id43" name="id43"><tt class="literal"><span class="pre">indirect_iterator</span></tt> operations</a></li>
<li><a class="reference" href="#specialized-adaptors-lib-iterator-special-adaptors" id="id44" name="id44">Specialized adaptors [lib.iterator.special.adaptors]</a><ul>
<li><a class="reference" href="#indirect-iterator" id="id45" name="id45">Indirect iterator</a><ul>
<li><a class="reference" href="#class-template-indirect-iterator" id="id46" name="id46">Class template <tt class="literal"><span class="pre">indirect_iterator</span></tt></a></li>
<li><a class="reference" href="#indirect-iterator-requirements" id="id47" name="id47"><tt class="literal"><span class="pre">indirect_iterator</span></tt> requirements</a></li>
<li><a class="reference" href="#indirect-iterator-models" id="id48" name="id48"><tt class="literal"><span class="pre">indirect_iterator</span></tt> models</a></li>
<li><a class="reference" href="#indirect-iterator-operations" id="id49" name="id49"><tt class="literal"><span class="pre">indirect_iterator</span></tt> operations</a></li>
</ul>
</li>
<li><a class="reference" href="#reverse-iterator" id="id44" name="id44">Reverse iterator</a><ul>
<li><a class="reference" href="#class-template-reverse-iterator" id="id45" name="id45">Class template <tt class="literal"><span class="pre">reverse_iterator</span></tt></a></li>
<li><a class="reference" href="#reverse-iterator-requirements" id="id46" name="id46"><tt class="literal"><span class="pre">reverse_iterator</span></tt> requirements</a></li>
<li><a class="reference" href="#reverse-iterator-models" id="id47" name="id47"><tt class="literal"><span class="pre">reverse_iterator</span></tt> models</a></li>
<li><a class="reference" href="#reverse-iterator-operations" id="id48" name="id48"><tt class="literal"><span class="pre">reverse_iterator</span></tt> operations</a></li>
<li><a class="reference" href="#reverse-iterator" id="id50" name="id50">Reverse iterator</a><ul>
<li><a class="reference" href="#class-template-reverse-iterator" id="id51" name="id51">Class template <tt class="literal"><span class="pre">reverse_iterator</span></tt></a></li>
<li><a class="reference" href="#reverse-iterator-requirements" id="id52" name="id52"><tt class="literal"><span class="pre">reverse_iterator</span></tt> requirements</a></li>
<li><a class="reference" href="#reverse-iterator-models" id="id53" name="id53"><tt class="literal"><span class="pre">reverse_iterator</span></tt> models</a></li>
<li><a class="reference" href="#reverse-iterator-operations" id="id54" name="id54"><tt class="literal"><span class="pre">reverse_iterator</span></tt> operations</a></li>
</ul>
</li>
<li><a class="reference" href="#transform-iterator" id="id49" name="id49">Transform iterator</a><ul>
<li><a class="reference" href="#class-template-transform-iterator" id="id50" name="id50">Class template <tt class="literal"><span class="pre">transform_iterator</span></tt></a></li>
<li><a class="reference" href="#transform-iterator-requirements" id="id51" name="id51"><tt class="literal"><span class="pre">transform_iterator</span></tt> requirements</a></li>
<li><a class="reference" href="#transform-iterator-models" id="id52" name="id52"><tt class="literal"><span class="pre">transform_iterator</span></tt> models</a></li>
<li><a class="reference" href="#transform-iterator-operations" id="id53" name="id53"><tt class="literal"><span class="pre">transform_iterator</span></tt> operations</a></li>
<li><a class="reference" href="#transform-iterator" id="id55" name="id55">Transform iterator</a><ul>
<li><a class="reference" href="#class-template-transform-iterator" id="id56" name="id56">Class template <tt class="literal"><span class="pre">transform_iterator</span></tt></a></li>
<li><a class="reference" href="#transform-iterator-requirements" id="id57" name="id57"><tt class="literal"><span class="pre">transform_iterator</span></tt> requirements</a></li>
<li><a class="reference" href="#transform-iterator-models" id="id58" name="id58"><tt class="literal"><span class="pre">transform_iterator</span></tt> models</a></li>
<li><a class="reference" href="#transform-iterator-operations" id="id59" name="id59"><tt class="literal"><span class="pre">transform_iterator</span></tt> operations</a></li>
</ul>
</li>
<li><a class="reference" href="#filter-iterator" id="id54" name="id54">Filter iterator</a><ul>
<li><a class="reference" href="#class-template-filter-iterator" id="id55" name="id55">Class template <tt class="literal"><span class="pre">filter_iterator</span></tt></a></li>
<li><a class="reference" href="#filter-iterator-requirements" id="id56" name="id56"><tt class="literal"><span class="pre">filter_iterator</span></tt> requirements</a></li>
<li><a class="reference" href="#filter-iterator-models" id="id57" name="id57"><tt class="literal"><span class="pre">filter_iterator</span></tt> models</a></li>
<li><a class="reference" href="#filter-iterator-operations" id="id58" name="id58"><tt class="literal"><span class="pre">filter_iterator</span></tt> operations</a></li>
<li><a class="reference" href="#filter-iterator" id="id60" name="id60">Filter iterator</a><ul>
<li><a class="reference" href="#class-template-filter-iterator" id="id61" name="id61">Class template <tt class="literal"><span class="pre">filter_iterator</span></tt></a></li>
<li><a class="reference" href="#filter-iterator-requirements" id="id62" name="id62"><tt class="literal"><span class="pre">filter_iterator</span></tt> requirements</a></li>
<li><a class="reference" href="#filter-iterator-models" id="id63" name="id63"><tt class="literal"><span class="pre">filter_iterator</span></tt> models</a></li>
<li><a class="reference" href="#filter-iterator-operations" id="id64" name="id64"><tt class="literal"><span class="pre">filter_iterator</span></tt> operations</a></li>
</ul>
</li>
<li><a class="reference" href="#counting-iterator" id="id59" name="id59">Counting iterator</a><ul>
<li><a class="reference" href="#class-template-counting-iterator" id="id60" name="id60">Class template <tt class="literal"><span class="pre">counting_iterator</span></tt></a></li>
<li><a class="reference" href="#counting-iterator-requirements" id="id61" name="id61"><tt class="literal"><span class="pre">counting_iterator</span></tt> requirements</a></li>
<li><a class="reference" href="#counting-iterator-models" id="id62" name="id62"><tt class="literal"><span class="pre">counting_iterator</span></tt> models</a></li>
<li><a class="reference" href="#counting-iterator-operations" id="id63" name="id63"><tt class="literal"><span class="pre">counting_iterator</span></tt> operations</a></li>
<li><a class="reference" href="#counting-iterator" id="id65" name="id65">Counting iterator</a><ul>
<li><a class="reference" href="#class-template-counting-iterator" id="id66" name="id66">Class template <tt class="literal"><span class="pre">counting_iterator</span></tt></a></li>
<li><a class="reference" href="#counting-iterator-requirements" id="id67" name="id67"><tt class="literal"><span class="pre">counting_iterator</span></tt> requirements</a></li>
<li><a class="reference" href="#counting-iterator-models" id="id68" name="id68"><tt class="literal"><span class="pre">counting_iterator</span></tt> models</a></li>
<li><a class="reference" href="#counting-iterator-operations" id="id69" name="id69"><tt class="literal"><span class="pre">counting_iterator</span></tt> operations</a></li>
</ul>
</li>
<li><a class="reference" href="#function-output-iterator" id="id64" name="id64">Function output iterator</a><ul>
<li><a class="reference" href="#class-template-function-output-iterator" id="id65" name="id65">Class template <tt class="literal"><span class="pre">function_output_iterator</span></tt></a></li>
<li><a class="reference" href="#function-output-iterator-requirements" id="id66" name="id66"><tt class="literal"><span class="pre">function_output_iterator</span></tt> requirements</a></li>
<li><a class="reference" href="#function-output-iterator-operations" id="id67" name="id67"><tt class="literal"><span class="pre">function_output_iterator</span></tt> operations</a></li>
<li><a class="reference" href="#function-output-iterator-output-proxy-operations" id="id68" name="id68"><tt class="literal"><span class="pre">function_output_iterator::output_proxy</span></tt> operations</a></li>
<li><a class="reference" href="#function-output-iterator" id="id70" name="id70">Function output iterator</a><ul>
<li><a class="reference" href="#class-template-function-output-iterator" id="id71" name="id71">Class template <tt class="literal"><span class="pre">function_output_iterator</span></tt></a></li>
<li><a class="reference" href="#function-output-iterator-requirements" id="id72" name="id72"><tt class="literal"><span class="pre">function_output_iterator</span></tt> requirements</a></li>
<li><a class="reference" href="#function-output-iterator-operations" id="id73" name="id73"><tt class="literal"><span class="pre">function_output_iterator</span></tt> operations</a></li>
<li><a class="reference" href="#function-output-iterator-output-proxy-operations" id="id74" name="id74"><tt class="literal"><span class="pre">function_output_iterator::output_proxy</span></tt> operations</a></li>
</ul>
</li>
</ul>
@ -141,7 +141,7 @@ by adapting other iterators.</td>
</ul>
</div>
<div class="section" id="motivation">
<h1><a class="toc-backref" href="#id13" name="motivation">Motivation</a></h1>
<h1><a class="toc-backref" href="#id19" name="motivation">Motivation</a></h1>
<p>Iterators play an important role in modern C++ programming. The
iterator is the central abstraction of the algorithms of the Standard
Library, allowing algorithms to be re-used in in a wide variety of
@ -226,15 +226,15 @@ applies some user-specified function during the dereference of the
iterator.</p>
</div>
<div class="section" id="impact-on-the-standard">
<h1><a class="toc-backref" href="#id14" name="impact-on-the-standard">Impact on the Standard</a></h1>
<h1><a class="toc-backref" href="#id20" name="impact-on-the-standard">Impact on the Standard</a></h1>
<p>This proposal is purely an addition to the C++ standard library.
However, note that this proposal relies on the proposal for New
Iterator Concepts.</p>
</div>
<div class="section" id="design">
<h1><a class="toc-backref" href="#id15" name="design">Design</a></h1>
<h1><a class="toc-backref" href="#id21" name="design">Design</a></h1>
<div class="section" id="iterator-concepts">
<h2><a class="toc-backref" href="#id16" name="iterator-concepts">Iterator Concepts</a></h2>
<h2><a class="toc-backref" href="#id22" name="iterator-concepts">Iterator Concepts</a></h2>
<p>This proposal is formulated in terms of the new <tt class="literal"><span class="pre">iterator</span> <span class="pre">concepts</span></tt>
as proposed in <a class="reference" href="http://anubis.dkuug.dk/JTC1/SC22/WG21/docs/papers/2003/n1550.html">n1550</a>, since user-defined and especially adapted
iterators suffer from the well known categorization problems that are
@ -244,7 +244,7 @@ is a direct mapping between new and old categories. This proposal
could be reformulated using this mapping if <a class="reference" href="http://anubis.dkuug.dk/JTC1/SC22/WG21/docs/papers/2003/n1550.html">n1550</a> was not accepted.</p>
</div>
<div class="section" id="interoperability">
<h2><a class="toc-backref" href="#id17" name="interoperability">Interoperability</a></h2>
<h2><a class="toc-backref" href="#id23" name="interoperability">Interoperability</a></h2>
<p>The question of iterator interoperability is poorly addressed in the
current standard. There are currently two defect reports that are
concerned with interoperability issues.</p>
@ -264,7 +264,7 @@ fixes the issues raised in 280. It provides the desired
interoperability without introducing unwanted overloads.</p>
</div>
<div class="section" id="iterator-facade">
<h2><a class="toc-backref" href="#id18" name="iterator-facade">Iterator Facade</a></h2>
<h2><a class="toc-backref" href="#id24" name="iterator-facade">Iterator Facade</a></h2>
<!-- Version 1.1 of this ReStructuredText document corresponds to
n1530_, the paper accepted by the LWG for TR1. -->
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. All
@ -307,7 +307,7 @@ impossible.</li>
</ol>
</blockquote>
<div class="section" id="usage">
<h3><a class="toc-backref" href="#id19" name="usage">Usage</a></h3>
<h3><a class="toc-backref" href="#id25" name="usage">Usage</a></h3>
<p>The user of <tt class="literal"><span class="pre">iterator_facade</span></tt> derives his iterator class from a
specialization of <tt class="literal"><span class="pre">iterator_facade</span></tt> and passes the derived
iterator class as <tt class="literal"><span class="pre">iterator_facade</span></tt>'s first template parameter.
@ -371,7 +371,7 @@ Iterator or a more-refined iterator concept, a default constructor is
required.</p>
</div>
<div class="section" id="iterator-core-access">
<h3><a class="toc-backref" href="#id20" name="iterator-core-access">Iterator Core Access</a></h3>
<h3><a class="toc-backref" href="#id26" name="iterator-core-access">Iterator Core Access</a></h3>
<p><tt class="literal"><span class="pre">iterator_facade</span></tt> and the operator implementations need to be able
to access the core member functions in the derived class. Making the
core member functions public would expose an implementation detail to
@ -405,7 +405,7 @@ open a safety loophole, as every core member function preserves the
invariants of the iterator.</p>
</div>
<div class="section" id="operator">
<h3><a class="toc-backref" href="#id21" name="operator"><tt class="literal"><span class="pre">operator[]</span></tt></a></h3>
<h3><a class="toc-backref" href="#id27" name="operator"><tt class="literal"><span class="pre">operator[]</span></tt></a></h3>
<p>The indexing operator for a generalized iterator presents special
challenges. A random access iterator's <tt class="literal"><span class="pre">operator[]</span></tt> is only
required to return something convertible to its <tt class="literal"><span class="pre">value_type</span></tt>.
@ -428,7 +428,7 @@ class; it will hide the one supplied by <tt class="literal"><span class="pre">it
clients of her iterator.</p>
<a class="target" id="operator-arrow" name="operator-arrow"></a></div>
<div class="section" id="id6">
<h3><a class="toc-backref" href="#id22" name="id6"><tt class="literal"><span class="pre">operator-&gt;</span></tt></a></h3>
<h3><a class="toc-backref" href="#id28" name="id6"><tt class="literal"><span class="pre">operator-&gt;</span></tt></a></h3>
<p>The <tt class="literal"><span class="pre">reference</span></tt> type of a readable iterator (and today's input
iterator) need not in fact be a reference, so long as it is
convertible to the iterator's <tt class="literal"><span class="pre">value_type</span></tt>. When the <tt class="literal"><span class="pre">value_type</span></tt>
@ -450,7 +450,7 @@ Patterns, C++ Report, February 1995, pp. 24-27.</td></tr>
</div>
</div>
<div class="section" id="iterator-adaptor">
<h2><a class="toc-backref" href="#id23" name="iterator-adaptor">Iterator Adaptor</a></h2>
<h2><a class="toc-backref" href="#id29" name="iterator-adaptor">Iterator Adaptor</a></h2>
<!-- Version 1.2 of this ReStructuredText document corresponds to
n1530_, the paper accepted by the LWG for TR1. -->
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. All
@ -491,7 +491,7 @@ template parameter may not always be identical to the iterator's
that assumption.</p>
</div>
<div class="section" id="specialized-adaptors">
<h2><a class="toc-backref" href="#id24" name="specialized-adaptors">Specialized Adaptors</a></h2>
<h2><a class="toc-backref" href="#id30" name="specialized-adaptors">Specialized Adaptors</a></h2>
<p>This proposal also contains several examples of specialized adaptors
which were easily implemented using <tt class="literal"><span class="pre">iterator_adaptor</span></tt>:</p>
<ul class="simple">
@ -528,9 +528,9 @@ Standard compliant iterators).</p>
</div>
</div>
<div class="section" id="proposed-text">
<h1><a class="toc-backref" href="#id25" name="proposed-text">Proposed Text</a></h1>
<h1><a class="toc-backref" href="#id31" name="proposed-text">Proposed Text</a></h1>
<div class="section" id="header-iterator-helper-synopsis-lib-iterator-helper-synopsis">
<h2><a class="toc-backref" href="#id26" name="header-iterator-helper-synopsis-lib-iterator-helper-synopsis">Header <tt class="literal"><span class="pre">&lt;iterator_helper&gt;</span></tt> synopsis [lib.iterator.helper.synopsis]</a></h2>
<h2><a class="toc-backref" href="#id32" name="header-iterator-helper-synopsis-lib-iterator-helper-synopsis">Header <tt class="literal"><span class="pre">&lt;iterator_helper&gt;</span></tt> synopsis [lib.iterator.helper.synopsis]</a></h2>
<pre class="literal-block">
struct use_default;
@ -590,7 +590,7 @@ class function_output_iterator;
</pre>
</div>
<div class="section" id="iterator-facade-lib-iterator-facade">
<h2><a class="toc-backref" href="#id27" name="iterator-facade-lib-iterator-facade">Iterator facade [lib.iterator.facade]</a></h2>
<h2><a class="toc-backref" href="#id33" name="iterator-facade-lib-iterator-facade">Iterator facade [lib.iterator.facade]</a></h2>
<p><tt class="literal"><span class="pre">iterator_facade</span></tt> is a base class template that implements the
interface of standard iterators in terms of a few core functions
and associated types, to be supplied by a derived iterator class.</p>
@ -705,7 +705,7 @@ struct enable_if_interoperable
{};
</pre>
<div class="section" id="iterator-facade-usage">
<h3><a class="toc-backref" href="#id28" name="iterator-facade-usage"><tt class="literal"><span class="pre">iterator_facade</span></tt> usage</a></h3>
<h3><a class="toc-backref" href="#id34" name="iterator-facade-usage"><tt class="literal"><span class="pre">iterator_facade</span></tt> usage</a></h3>
<p>The following table describes the typical valid expressions on
<tt class="literal"><span class="pre">iterator_facade</span></tt>'s <tt class="literal"><span class="pre">Derived</span></tt> parameter, depending on the
iterator concept(s) it will model. The operations in the first
@ -718,7 +718,7 @@ object of a single pass iterator type interoperable with <tt class="literal"><sp
is a constant object of a random access traversal iterator type
interoperable with <tt class="literal"><span class="pre">X</span></tt>.</p>
<a class="target" id="core-operations" name="core-operations"></a><div class="section" id="iterator-facade-core-operations">
<h4><a class="toc-backref" href="#id29" name="iterator-facade-core-operations"><tt class="literal"><span class="pre">iterator_facade</span></tt> Core Operations</a></h4>
<h4><a class="toc-backref" href="#id35" name="iterator-facade-core-operations"><tt class="literal"><span class="pre">iterator_facade</span></tt> Core Operations</a></h4>
<table class="table" frame="border" rules="all">
<colgroup>
<col width="19%" />
@ -786,7 +786,7 @@ Iterator</td>
<a class="target" id="facade-iterator-category" name="facade-iterator-category"></a></div>
</div>
<div class="section" id="iterator-facade-iterator-category">
<h3><a class="toc-backref" href="#id30" name="iterator-facade-iterator-category"><tt class="literal"><span class="pre">iterator_facade</span></tt> iterator category</a></h3>
<h3><a class="toc-backref" href="#id36" name="iterator-facade-iterator-category"><tt class="literal"><span class="pre">iterator_facade</span></tt> iterator category</a></h3>
<p>The <tt class="literal"><span class="pre">iterator_category</span></tt> member of <tt class="literal"><span class="pre">iterator_facade&lt;X,V,R,C,D&gt;</span></tt>
is a type which satisfies the following conditions:</p>
<blockquote>
@ -839,7 +839,7 @@ convertible, and not to any more-derived traversal tag type.</p>
</blockquote>
</div>
<div class="section" id="iterator-facade-operations">
<h3><a class="toc-backref" href="#id31" name="iterator-facade-operations"><tt class="literal"><span class="pre">iterator_facade</span></tt> operations</a></h3>
<h3><a class="toc-backref" href="#id37" name="iterator-facade-operations"><tt class="literal"><span class="pre">iterator_facade</span></tt> operations</a></h3>
<p>The operations in this section are described in terms of operations on
the core interface of <tt class="literal"><span class="pre">Derived</span></tt> which may be inaccessible
(i.e. private). The implementation should access these operations
@ -981,7 +981,7 @@ return tmp -= n;
</div>
</div>
<div class="section" id="iterator-adaptor-lib-iterator-adaptor">
<h2><a class="toc-backref" href="#id32" name="iterator-adaptor-lib-iterator-adaptor">Iterator adaptor [lib.iterator.adaptor]</a></h2>
<h2><a class="toc-backref" href="#id38" name="iterator-adaptor-lib-iterator-adaptor">Iterator adaptor [lib.iterator.adaptor]</a></h2>
<!-- Version 1.1 of this ReStructuredText document corresponds to
n1530_, the paper accepted by the LWG. -->
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. All
@ -1043,7 +1043,7 @@ class iterator_adaptor
};
</pre>
<a class="target" id="base-parameters" name="base-parameters"></a><div class="section" id="iterator-adaptor-base-class-parameters">
<h3><a class="toc-backref" href="#id33" name="iterator-adaptor-base-class-parameters"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> base class parameters</a></h3>
<h3><a class="toc-backref" href="#id39" name="iterator-adaptor-base-class-parameters"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> base class parameters</a></h3>
<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>
@ -1073,19 +1073,28 @@ above are defined as follows:</p>
</pre>
</div>
<div class="section" id="iterator-adaptor-usage">
<h3><a class="toc-backref" href="#id34" name="iterator-adaptor-usage"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> usage</a></h3>
<h3><a class="toc-backref" href="#id40" name="iterator-adaptor-usage"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> usage</a></h3>
<p>The <tt class="literal"><span class="pre">Derived</span></tt> template parameter must be a publicly derived from
<tt class="literal"><span class="pre">iterator_adaptor</span></tt>. In order for <tt class="literal"><span class="pre">Derived</span></tt> to model the
iterator concepts corresponding to
<tt class="literal"><span class="pre">iterator_traits&lt;Derived&gt;::iterator_category</span></tt>, the expressions
involving <tt class="literal"><span class="pre">m_iterator</span></tt> in the specifications of those private
member functions of <tt class="literal"><span class="pre">iterator_adaptor</span></tt> that may be called by
<tt class="literal"><span class="pre">iterator_facade&lt;Derived,</span> <span class="pre">``\</span> <span class="pre">*V*\</span></tt>, <tt class="literal"><span class="pre">\</span> <span class="pre">*C*\</span></tt>, <tt class="literal"><span class="pre">\</span> <span class="pre">*R*\</span></tt>, <tt class="literal"><span class="pre">\</span>
<span class="pre">*D*\</span></tt>&gt;`` in evaluating any valid expression involving <tt class="literal"><span class="pre">Derived</span></tt>
<tt class="literal"><span class="pre">iterator_facade&lt;Derived,</span> <span class="pre">``</span> <span class="pre">*V*</span></tt>, `` <a href="#id13" name="id14"><span class="problematic" id="id14">*</span></a>C*``, `` <a href="#id15" name="id16"><span class="problematic" id="id16">*</span></a>R*``, ``
<a href="#id17" name="id18"><span class="problematic" id="id18">*</span></a>D*``&gt;`` in evaluating any valid expression involving <tt class="literal"><span class="pre">Derived</span></tt>
in those concepts' requirements.</p>
<div class="system-message" id="id13">
<p class="system-message-title">System Message: <a name="id13">WARNING/2</a> (<tt>facade-and-adaptor.rst</tt>, line 989); <em><a href="#id14">backlink</a></em></p>
Inline emphasis start-string without end-string.</div>
<div class="system-message" id="id15">
<p class="system-message-title">System Message: <a name="id15">WARNING/2</a> (<tt>facade-and-adaptor.rst</tt>, line 989); <em><a href="#id16">backlink</a></em></p>
Inline emphasis start-string without end-string.</div>
<div class="system-message" id="id17">
<p class="system-message-title">System Message: <a name="id17">WARNING/2</a> (<tt>facade-and-adaptor.rst</tt>, line 989); <em><a href="#id18">backlink</a></em></p>
Inline emphasis start-string without end-string.</div>
</div>
<div class="section" id="iterator-adaptor-public-operations">
<h3><a class="toc-backref" href="#id35" name="iterator-adaptor-public-operations"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> public operations</a></h3>
<h3><a class="toc-backref" href="#id41" name="iterator-adaptor-public-operations"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> public operations</a></h3>
<p><tt class="literal"><span class="pre">iterator_adaptor();</span></tt></p>
<table class="field-list" frame="void" rules="none">
<col class="field-name" />
@ -1119,7 +1128,7 @@ in those concepts' requirements.</p>
</table>
</div>
<div class="section" id="iterator-adaptor-protected-member-functions">
<h3><a class="toc-backref" href="#id36" name="iterator-adaptor-protected-member-functions"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> protected member functions</a></h3>
<h3><a class="toc-backref" href="#id42" name="iterator-adaptor-protected-member-functions"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> protected member functions</a></h3>
<p><tt class="literal"><span class="pre">Base</span> <span class="pre">const&amp;</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" />
@ -1140,7 +1149,7 @@ in those concepts' requirements.</p>
</table>
</div>
<div class="section" id="iterator-adaptor-private-member-functions">
<h3><a class="toc-backref" href="#id37" name="iterator-adaptor-private-member-functions"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> private member functions</a></h3>
<h3><a class="toc-backref" href="#id43" name="iterator-adaptor-private-member-functions"><tt class="literal"><span class="pre">iterator_adaptor</span></tt> private member functions</a></h3>
<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" />
@ -1209,7 +1218,7 @@ typename iterator_adaptor::difference_type distance_to(
</div>
</div>
<div class="section" id="specialized-adaptors-lib-iterator-special-adaptors">
<h2><a class="toc-backref" href="#id38" name="specialized-adaptors-lib-iterator-special-adaptors">Specialized adaptors [lib.iterator.special.adaptors]</a></h2>
<h2><a class="toc-backref" href="#id44" name="specialized-adaptors-lib-iterator-special-adaptors">Specialized adaptors [lib.iterator.special.adaptors]</a></h2>
<p>The <tt class="literal"><span class="pre">enable_if_convertible&lt;X,Y&gt;::type</span></tt> expression used in
this section is for exposition purposes. The converting constructors
for specialized adaptors should be only be in an overload set provided
@ -1238,7 +1247,7 @@ take the constructor out of the overload set when the types are not
implicitly convertible.
]</p>
<div class="section" id="indirect-iterator">
<h3><a class="toc-backref" href="#id39" name="indirect-iterator">Indirect iterator</a></h3>
<h3><a class="toc-backref" href="#id45" name="indirect-iterator">Indirect iterator</a></h3>
<p>The indirect iterator adapts an iterator by applying an <em>extra</em>
dereference inside of <tt class="literal"><span class="pre">operator*()</span></tt>. For example, this iterator
adaptor makes it possible to view a container of pointers
@ -1247,7 +1256,7 @@ adaptor makes it possible to view a container of pointers
<!-- At some point we should add the capability to handle
iterators over smart pointers, which the impl handles. -JGS -->
<div class="section" id="class-template-indirect-iterator">
<h4><a class="toc-backref" href="#id40" name="class-template-indirect-iterator">Class template <tt class="literal"><span class="pre">indirect_iterator</span></tt></a></h4>
<h4><a class="toc-backref" href="#id46" name="class-template-indirect-iterator">Class template <tt class="literal"><span class="pre">indirect_iterator</span></tt></a></h4>
<pre class="literal-block">
template &lt;
class Iterator
@ -1316,7 +1325,7 @@ satisfies the requirements of the concepts modeled by the indirect
iterator as specified in the models section.</p>
</div>
<div class="section" id="indirect-iterator-requirements">
<h4><a class="toc-backref" href="#id41" name="indirect-iterator-requirements"><tt class="literal"><span class="pre">indirect_iterator</span></tt> requirements</a></h4>
<h4><a class="toc-backref" href="#id47" name="indirect-iterator-requirements"><tt class="literal"><span class="pre">indirect_iterator</span></tt> requirements</a></h4>
<p>The <tt class="literal"><span class="pre">Iterator</span></tt> argument shall meet the requirements of Readable
Iterator. The <tt class="literal"><span class="pre">CategoryOrTraversal</span></tt> argument shall be one of the
standard iterator tags or <tt class="literal"><span class="pre">use_default</span></tt>. If <tt class="literal"><span class="pre">CategoryOrTraversal</span></tt>
@ -1332,7 +1341,7 @@ is not <tt class="literal"><span class="pre">use_default</span></tt>, as implied
default for the <tt class="literal"><span class="pre">value_type</span></tt> member.</p>
</div>
<div class="section" id="indirect-iterator-models">
<h4><a class="toc-backref" href="#id42" name="indirect-iterator-models"><tt class="literal"><span class="pre">indirect_iterator</span></tt> models</a></h4>
<h4><a class="toc-backref" href="#id48" name="indirect-iterator-models"><tt class="literal"><span class="pre">indirect_iterator</span></tt> models</a></h4>
<p>If <tt class="literal"><span class="pre">CategoryOrTraversal</span></tt> is a standard iterator tag,
<tt class="literal"><span class="pre">indirect_iterator</span></tt> is a model of the iterator concept corresponding
to the tag, otherwise <tt class="literal"><span class="pre">indirect_iterator</span></tt> satisfies the requirements
@ -1346,7 +1355,7 @@ the <tt class="literal"><span class="pre">Iterator</span></tt> argument.</p>
<tt class="literal"><span class="pre">indirect_iterator</span></tt> models Lvalue Iterator.</p>
</div>
<div class="section" id="indirect-iterator-operations">
<h4><a class="toc-backref" href="#id43" name="indirect-iterator-operations"><tt class="literal"><span class="pre">indirect_iterator</span></tt> operations</a></h4>
<h4><a class="toc-backref" href="#id49" name="indirect-iterator-operations"><tt class="literal"><span class="pre">indirect_iterator</span></tt> operations</a></h4>
<p><tt class="literal"><span class="pre">indirect_iterator();</span></tt></p>
<table class="field-list" frame="void" rules="none">
<col class="field-name" />
@ -1404,13 +1413,13 @@ indirect_iterator(
</div>
</div>
<div class="section" id="reverse-iterator">
<h3><a class="toc-backref" href="#id44" name="reverse-iterator">Reverse iterator</a></h3>
<h3><a class="toc-backref" href="#id50" name="reverse-iterator">Reverse iterator</a></h3>
<!-- I think we'd better strike the old reverse_iterator text from the standard, eh? -->
<p>The reverse iterator adaptor flips the direction of a base iterator's
motion. Invoking <tt class="literal"><span class="pre">operator++()</span></tt> moves the base iterator backward and
invoking <tt class="literal"><span class="pre">operator--()</span></tt> moves the base iterator forward.</p>
<div class="section" id="class-template-reverse-iterator">
<h4><a class="toc-backref" href="#id45" name="class-template-reverse-iterator">Class template <tt class="literal"><span class="pre">reverse_iterator</span></tt></a></h4>
<h4><a class="toc-backref" href="#id51" name="class-template-reverse-iterator">Class template <tt class="literal"><span class="pre">reverse_iterator</span></tt></a></h4>
<pre class="literal-block">
template &lt;class Iterator&gt;
class reverse_iterator
@ -1433,19 +1442,19 @@ private:
</pre>
</div>
<div class="section" id="reverse-iterator-requirements">
<h4><a class="toc-backref" href="#id46" name="reverse-iterator-requirements"><tt class="literal"><span class="pre">reverse_iterator</span></tt> requirements</a></h4>
<h4><a class="toc-backref" href="#id52" name="reverse-iterator-requirements"><tt class="literal"><span class="pre">reverse_iterator</span></tt> requirements</a></h4>
<p>The base <tt class="literal"><span class="pre">Iterator</span></tt> must be a model of Bidirectional Traversal
Iterator and Readable Iterator.</p>
</div>
<div class="section" id="reverse-iterator-models">
<h4><a class="toc-backref" href="#id47" name="reverse-iterator-models"><tt class="literal"><span class="pre">reverse_iterator</span></tt> models</a></h4>
<h4><a class="toc-backref" href="#id53" name="reverse-iterator-models"><tt class="literal"><span class="pre">reverse_iterator</span></tt> models</a></h4>
<p><tt class="literal"><span class="pre">reverse_iterator</span></tt> models Bidirectional Traversal Iterator and
Readable Iterator. In addition, <tt class="literal"><span class="pre">reverse_iterator</span></tt> models the same
standard iterator access concepts that the <tt class="literal"><span class="pre">Iterator</span></tt>
argument models.</p>
</div>
<div class="section" id="reverse-iterator-operations">
<h4><a class="toc-backref" href="#id48" name="reverse-iterator-operations"><tt class="literal"><span class="pre">reverse_iterator</span></tt> operations</a></h4>
<h4><a class="toc-backref" href="#id54" name="reverse-iterator-operations"><tt class="literal"><span class="pre">reverse_iterator</span></tt> operations</a></h4>
<p><tt class="literal"><span class="pre">reverse_iterator();</span></tt></p>
<table class="field-list" frame="void" rules="none">
<col class="field-name" />
@ -1521,14 +1530,14 @@ return *..tmp;
</div>
</div>
<div class="section" id="transform-iterator">
<h3><a class="toc-backref" href="#id49" name="transform-iterator">Transform iterator</a></h3>
<h3><a class="toc-backref" href="#id55" name="transform-iterator">Transform iterator</a></h3>
<p>The transform iterator adapts an iterator by applying some function
object to the result of dereferencing the iterator. In other words,
the <tt class="literal"><span class="pre">operator*</span></tt> of the transform iterator first dereferences the
base iterator, passes the result of this to the function object, and
then returns the result.</p>
<div class="section" id="class-template-transform-iterator">
<h4><a class="toc-backref" href="#id50" name="class-template-transform-iterator">Class template <tt class="literal"><span class="pre">transform_iterator</span></tt></a></h4>
<h4><a class="toc-backref" href="#id56" name="class-template-transform-iterator">Class template <tt class="literal"><span class="pre">transform_iterator</span></tt></a></h4>
<!-- Version 1.3 of this document was accepted for TR1 -->
<pre class="literal-block">
template &lt;class UnaryFunction,
@ -1559,7 +1568,7 @@ private:
</pre>
</div>
<div class="section" id="transform-iterator-requirements">
<h4><a class="toc-backref" href="#id51" name="transform-iterator-requirements"><tt class="literal"><span class="pre">transform_iterator</span></tt> requirements</a></h4>
<h4><a class="toc-backref" href="#id57" name="transform-iterator-requirements"><tt class="literal"><span class="pre">transform_iterator</span></tt> requirements</a></h4>
<p>The type <tt class="literal"><span class="pre">UnaryFunction</span></tt> must be Assignable, Copy Constructible, and
the expression <tt class="literal"><span class="pre">f(*i)</span></tt> must be valid where <tt class="literal"><span class="pre">f</span></tt> is an object of
type <tt class="literal"><span class="pre">UnaryFunction</span></tt>, <tt class="literal"><span class="pre">i</span></tt> is an object of type <tt class="literal"><span class="pre">Iterator</span></tt>, and
@ -1568,7 +1577,7 @@ where the type of <tt class="literal"><span class="pre">f(*i)</span></tt> must b
<p>The type <tt class="literal"><span class="pre">Iterator</span></tt> must at least model Readable Iterator.</p>
</div>
<div class="section" id="transform-iterator-models">
<h4><a class="toc-backref" href="#id52" name="transform-iterator-models"><tt class="literal"><span class="pre">transform_iterator</span></tt> models</a></h4>
<h4><a class="toc-backref" href="#id58" name="transform-iterator-models"><tt class="literal"><span class="pre">transform_iterator</span></tt> models</a></h4>
<p>The resulting <tt class="literal"><span class="pre">transform_iterator</span></tt> models the most refined of the
following options that is also modeled by <tt class="literal"><span class="pre">Iterator</span></tt>.</p>
<blockquote>
@ -1586,7 +1595,7 @@ concept that is modeled by <tt class="literal"><span class="pre">Iterator</span>
The <tt class="literal"><span class="pre">value_type</span></tt> is <tt class="literal"><span class="pre">remove_cv&lt;remove_reference&lt;reference&gt;</span> <span class="pre">&gt;::type</span></tt>.</p>
</div>
<div class="section" id="transform-iterator-operations">
<h4><a class="toc-backref" href="#id53" name="transform-iterator-operations"><tt class="literal"><span class="pre">transform_iterator</span></tt> operations</a></h4>
<h4><a class="toc-backref" href="#id59" name="transform-iterator-operations"><tt class="literal"><span class="pre">transform_iterator</span></tt> operations</a></h4>
<p><tt class="literal"><span class="pre">transform_iterator();</span></tt></p>
<table class="field-list" frame="void" rules="none">
<col class="field-name" />
@ -1665,7 +1674,7 @@ transform_iterator(
</div>
</div>
<div class="section" id="filter-iterator">
<h3><a class="toc-backref" href="#id54" name="filter-iterator">Filter iterator</a></h3>
<h3><a class="toc-backref" href="#id60" name="filter-iterator">Filter iterator</a></h3>
<p>The filter iterator adaptor creates a view of an iterator range in
which some elements of the range are skipped over. A predicate
function object controls which elements are skipped. When the
@ -1677,7 +1686,7 @@ of the underlying range. Therefore the constructor of the filter
iterator takes two iterator parameters: the position for the filtered
iterator and the end of the range.</p>
<div class="section" id="class-template-filter-iterator">
<h4><a class="toc-backref" href="#id55" name="class-template-filter-iterator">Class template <tt class="literal"><span class="pre">filter_iterator</span></tt></a></h4>
<h4><a class="toc-backref" href="#id61" name="class-template-filter-iterator">Class template <tt class="literal"><span class="pre">filter_iterator</span></tt></a></h4>
<pre class="literal-block">
template &lt;class Predicate, class Iterator&gt;
class filter_iterator
@ -1713,7 +1722,7 @@ corresponding to each standard concept modeled by <tt class="literal"><span clas
as described in the models section.</p>
</div>
<div class="section" id="filter-iterator-requirements">
<h4><a class="toc-backref" href="#id56" name="filter-iterator-requirements"><tt class="literal"><span class="pre">filter_iterator</span></tt> requirements</a></h4>
<h4><a class="toc-backref" href="#id62" name="filter-iterator-requirements"><tt class="literal"><span class="pre">filter_iterator</span></tt> requirements</a></h4>
<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
@ -1724,7 +1733,7 @@ Iterator and Single Pass Iterator or it shall meet the requirements of
Input Iterator.</p>
</div>
<div class="section" id="filter-iterator-models">
<h4><a class="toc-backref" href="#id57" name="filter-iterator-models"><tt class="literal"><span class="pre">filter_iterator</span></tt> models</a></h4>
<h4><a class="toc-backref" href="#id63" name="filter-iterator-models"><tt class="literal"><span class="pre">filter_iterator</span></tt> models</a></h4>
<p>The concepts that <tt class="literal"><span class="pre">filter_iterator</span></tt> models are dependent on what
concepts the <tt class="literal"><span class="pre">Iterator</span></tt> argument models, as specified in the
following tables.</p>
@ -1793,7 +1802,7 @@ following tables.</p>
</table>
</div>
<div class="section" id="filter-iterator-operations">
<h4><a class="toc-backref" href="#id58" name="filter-iterator-operations"><tt class="literal"><span class="pre">filter_iterator</span></tt> operations</a></h4>
<h4><a class="toc-backref" href="#id64" name="filter-iterator-operations"><tt class="literal"><span class="pre">filter_iterator</span></tt> operations</a></h4>
<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>
@ -1903,11 +1912,11 @@ or <tt class="literal"><span class="pre">m_pred(*m_iter)</span> <span class="pre
</div>
</div>
<div class="section" id="counting-iterator">
<h3><a class="toc-backref" href="#id59" name="counting-iterator">Counting iterator</a></h3>
<h3><a class="toc-backref" href="#id65" name="counting-iterator">Counting iterator</a></h3>
<p><tt class="literal"><span class="pre">counting_iterator</span></tt> adapts an arithmetic type, such as <tt class="literal"><span class="pre">int</span></tt>, by
adding an <tt class="literal"><span class="pre">operator*</span></tt> that returns the current value of the object.</p>
<div class="section" id="class-template-counting-iterator">
<h4><a class="toc-backref" href="#id60" name="class-template-counting-iterator">Class template <tt class="literal"><span class="pre">counting_iterator</span></tt></a></h4>
<h4><a class="toc-backref" href="#id66" name="class-template-counting-iterator">Class template <tt class="literal"><span class="pre">counting_iterator</span></tt></a></h4>
<pre class="literal-block">
template &lt;
class Incrementable
@ -1932,13 +1941,13 @@ the cases when the <tt class="literal"><span class="pre">Incrementable</span></t
</dl>
</div>
<div class="section" id="counting-iterator-requirements">
<h4><a class="toc-backref" href="#id61" name="counting-iterator-requirements"><tt class="literal"><span class="pre">counting_iterator</span></tt> requirements</a></h4>
<h4><a class="toc-backref" href="#id67" name="counting-iterator-requirements"><tt class="literal"><span class="pre">counting_iterator</span></tt> requirements</a></h4>
<p>The <tt class="literal"><span class="pre">Incrementable</span></tt> type must be Default Constructible, Copy
Constructible, and Assignable. The default distance is
an implementation defined signed integral type.</p>
</div>
<div class="section" id="counting-iterator-models">
<h4><a class="toc-backref" href="#id62" name="counting-iterator-models"><tt class="literal"><span class="pre">counting_iterator</span></tt> models</a></h4>
<h4><a class="toc-backref" href="#id68" name="counting-iterator-models"><tt class="literal"><span class="pre">counting_iterator</span></tt> models</a></h4>
<p><tt class="literal"><span class="pre">counting_iterator</span></tt> models Readable Lvalue Iterator.</p>
<p>Furthermore, if you wish to create a counting iterator that is a Forward
Traversal Iterator, then the following expressions must be valid:</p>
@ -1963,7 +1972,7 @@ i &lt; j
</pre>
</div>
<div class="section" id="counting-iterator-operations">
<h4><a class="toc-backref" href="#id63" name="counting-iterator-operations"><tt class="literal"><span class="pre">counting_iterator</span></tt> operations</a></h4>
<h4><a class="toc-backref" href="#id69" name="counting-iterator-operations"><tt class="literal"><span class="pre">counting_iterator</span></tt> operations</a></h4>
<p><tt class="literal"><span class="pre">counting_iterator();</span></tt></p>
<table class="field-list" frame="void" rules="none">
<col class="field-name" />
@ -2022,7 +2031,7 @@ constructed from <tt class="literal"><span class="pre">x</span></tt>.</td>
</div>
</div>
<div class="section" id="function-output-iterator">
<h3><a class="toc-backref" href="#id64" name="function-output-iterator">Function output iterator</a></h3>
<h3><a class="toc-backref" href="#id70" name="function-output-iterator">Function output iterator</a></h3>
<p>The function output iterator adaptor makes it easier to create custom
output iterators. The adaptor takes a unary function and creates a
model of Output Iterator. Each item assigned to the output iterator is
@ -2031,7 +2040,7 @@ iterator is that creating a conforming output iterator is non-trivial,
particularly because the proper implementation usually requires a
proxy object.</p>
<div class="section" id="class-template-function-output-iterator">
<h4><a class="toc-backref" href="#id65" name="class-template-function-output-iterator">Class template <tt class="literal"><span class="pre">function_output_iterator</span></tt></a></h4>
<h4><a class="toc-backref" href="#id71" name="class-template-function-output-iterator">Class template <tt class="literal"><span class="pre">function_output_iterator</span></tt></a></h4>
<pre class="literal-block">
template &lt;class UnaryFunction&gt;
class function_output_iterator {
@ -2058,7 +2067,7 @@ public:
</pre>
</div>
<div class="section" id="function-output-iterator-requirements">
<h4><a class="toc-backref" href="#id66" name="function-output-iterator-requirements"><tt class="literal"><span class="pre">function_output_iterator</span></tt> requirements</a></h4>
<h4><a class="toc-backref" href="#id72" name="function-output-iterator-requirements"><tt class="literal"><span class="pre">function_output_iterator</span></tt> requirements</a></h4>
<p>The <tt class="literal"><span class="pre">UnaryFunction</span></tt> must be Assignable, Copy Constructible, and the
expression <tt class="literal"><span class="pre">f(x)</span></tt> must be valid, where <tt class="literal"><span class="pre">f</span></tt> is an object of type
<tt class="literal"><span class="pre">UnaryFunction</span></tt> and <tt class="literal"><span class="pre">x</span></tt> is an object of a type accepted by <tt class="literal"><span class="pre">f</span></tt>.
@ -2066,7 +2075,7 @@ The resulting <tt class="literal"><span class="pre">function_output_iterator</sp
and Incrementable Iterator concepts.</p>
</div>
<div class="section" id="function-output-iterator-operations">
<h4><a class="toc-backref" href="#id67" name="function-output-iterator-operations"><tt class="literal"><span class="pre">function_output_iterator</span></tt> operations</a></h4>
<h4><a class="toc-backref" href="#id73" name="function-output-iterator-operations"><tt class="literal"><span class="pre">function_output_iterator</span></tt> operations</a></h4>
<p><tt class="literal"><span class="pre">explicit</span> <span class="pre">function_output_iterator(const</span> <span class="pre">UnaryFunction&amp;</span> <span class="pre">f</span> <span class="pre">=</span> <span class="pre">UnaryFunction());</span></tt></p>
<table class="field-list" frame="void" rules="none">
<col class="field-name" />
@ -2107,7 +2116,7 @@ a copy of the unary function <tt class="literal"><span class="pre">f</span></tt>
</table>
</div>
<div class="section" id="function-output-iterator-output-proxy-operations">
<h4><a class="toc-backref" href="#id68" name="function-output-iterator-output-proxy-operations"><tt class="literal"><span class="pre">function_output_iterator::output_proxy</span></tt> operations</a></h4>
<h4><a class="toc-backref" href="#id74" name="function-output-iterator-output-proxy-operations"><tt class="literal"><span class="pre">function_output_iterator::output_proxy</span></tt> operations</a></h4>
<p><tt class="literal"><span class="pre">output_proxy(UnaryFunction&amp;</span> <span class="pre">f);</span></tt></p>
<table class="field-list" frame="void" rules="none">
<col class="field-name" />
@ -2145,7 +2154,7 @@ LocalWords: OtherIncrementable Coplien -->
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@ -3,7 +3,7 @@
<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 0.3.0: http://docutils.sourceforge.net/" />
<meta name="generator" content="Docutils 0.2.8: http://docutils.sourceforge.net/" />
<title>Filter Iterator</title>
<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" />
@ -108,7 +108,7 @@ Input Iterator.</p>
<p>The concepts that <tt class="literal"><span class="pre">filter_iterator</span></tt> models are dependent on what
concepts the <tt class="literal"><span class="pre">Iterator</span></tt> argument models, as specified in the
following tables.</p>
<table border class="table">
<table class="table" frame="border" rules="all">
<colgroup>
<col width="33%" />
<col width="67%" />
@ -127,7 +127,7 @@ following tables.</p>
</tr>
</tbody>
</table>
<table border class="table">
<table class="table" frame="border" rules="all">
<colgroup>
<col width="41%" />
<col width="59%" />
@ -149,7 +149,7 @@ following tables.</p>
</tr>
</tbody>
</table>
<table border class="table">
<table class="table" frame="border" rules="all">
<colgroup>
<col width="63%" />
<col width="38%" />
@ -374,5 +374,11 @@ int main()
</pre>
</div>
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@ -3,7 +3,7 @@
<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 0.3.0: http://docutils.sourceforge.net/" />
<meta name="generator" content="Docutils 0.2.8: http://docutils.sourceforge.net/" />
<title>Function Output Iterator</title>
<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" />
@ -191,5 +191,11 @@ int main(int, char*[])
</pre>
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@ -3,240 +3,13 @@
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<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="date" content="2003-09-14" />
<meta name="copyright" content="Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. All rights reserved" />
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<div class="document" id="iterator-adaptor">
@ -422,8 +195,8 @@ iterator concepts corresponding to
<tt class="literal"><span class="pre">iterator_traits&lt;Derived&gt;::iterator_category</span></tt>, the expressions
involving <tt class="literal"><span class="pre">m_iterator</span></tt> in the specifications of those private
member functions of <tt class="literal"><span class="pre">iterator_adaptor</span></tt> that may be called by
<tt class="literal"><span class="pre">iterator_facade&lt;Derived,</span> <span class="pre">``\</span> <span class="pre">*V*\</span></tt>, <tt class="literal"><span class="pre">\</span> <span class="pre">*C*\</span></tt>, <tt class="literal"><span class="pre">\</span> <span class="pre">*R*\</span></tt>, <tt class="literal"><span class="pre">\</span>
<span class="pre">*D*\</span></tt>&gt;`` in evaluating any valid expression involving <tt class="literal"><span class="pre">Derived</span></tt>
<tt class="literal"><span class="pre">iterator_facade&lt;Derived,</span> <span class="pre">V,</span> <span class="pre">C,</span> <span class="pre">R,</span> <span class="pre">D&gt;</span></tt>
in evaluating any valid expression involving <tt class="literal"><span class="pre">Derived</span></tt>
in those concepts' requirements.</p>
</div>
<div class="section" id="iterator-adaptor-public-operations">
@ -551,10 +324,10 @@ typename iterator_adaptor::difference_type distance_to(
</div>
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@ -92,8 +92,8 @@ 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``
``iterator_facade<Derived, V, C, R, D>``
in evaluating any valid expression involving ``Derived``
in those concepts' requirements.
``iterator_adaptor`` public operations

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@ -3,7 +3,7 @@
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@ -211,5 +211,11 @@ Iterate backward with stride 2 : 6 8
</pre>
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@ -3,7 +3,7 @@
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@ -3,7 +3,7 @@
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@ -251,5 +251,11 @@ adding 4 to each element in the array:
</pre>
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