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Add missing license/copyright

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[SVN r35070]
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Dave Abrahams
2006-09-11 22:27:29 +00:00
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<title>Iterator Traits</title>
<meta name="author" content="David Abrahams" />
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<div class="document" id="iterator-traits">
@ -30,41 +312,44 @@
<td>Copyright David Abrahams 2004.</td></tr>
</tbody>
</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) -->
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">abstract:</th><td class="field-body">Header <tt class="docutils literal"><span class="pre">&lt;boost/iterator/iterator_traits.hpp&gt;</span></tt> provides
the ability to access an iterator's associated types using
MPL-compatible <a class="reference" href="../../mpl/doc/refmanual/metafunction.html">metafunctions</a>.</td>
MPL-compatible <a class="reference" href="../../mpl/doc/index.html#metafunctions">metafunctions</a>.</td>
</tr>
</tbody>
</table>
<div class="section" id="overview">
<h1><a name="overview">Overview</a></h1>
<div class="section">
<h1><a id="overview" name="overview">Overview</a></h1>
<p><tt class="docutils 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>,
<tt class="docutils literal"><span class="pre">iterator_category</span></tt>, and <tt class="docutils literal"><span class="pre">difference_type</span></tt>. Unfortunately,
such a &quot;multi-valued&quot; traits template can be difficult to use in a
metaprogramming context. <tt class="docutils literal"><span class="pre">&lt;boost/iterator/iterator_traits.hpp&gt;</span></tt>
provides access to these types using a standard <a class="reference" href="../../mpl/doc/refmanual/metafunction.html">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 class="section" id="summary">
<h1><a name="summary">Summary</a></h1>
<div class="section">
<h1><a id="summary" name="summary">Summary</a></h1>
<p>Header <tt class="docutils literal"><span class="pre">&lt;boost/iterator/iterator_traits.hpp&gt;</span></tt>:</p>
<pre class="literal-block">
template &lt;class Iterator&gt;
struct iterator_value
{
typedef typename
std::iterator_traits&lt;Iterator&gt;::value_type
typedef typename
std::iterator_traits&lt;Iterator&gt;::value_type
type;
};
template &lt;class Iterator&gt;
struct iterator_reference
{
typedef typename
typedef typename
std::iterator_traits&lt;Iterator&gt;::reference
type;
};
@ -73,8 +358,8 @@ struct iterator_reference
template &lt;class Iterator&gt;
struct iterator_pointer
{
typedef typename
std::iterator_traits&lt;Iterator&gt;::pointer
typedef typename
std::iterator_traits&lt;Iterator&gt;::pointer
type;
};
@ -95,14 +380,14 @@ struct iterator_category
};
</pre>
</div>
<div class="section" id="broken-compiler-notes">
<h1><a name="broken-compiler-notes">Broken Compiler Notes</a></h1>
<div class="section">
<h1><a id="broken-compiler-notes" name="broken-compiler-notes">Broken Compiler Notes</a></h1>
<p>Because of workarounds in Boost, you may find that these
<a class="reference" href="../../mpl/doc/refmanual/metafunction.html">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>
<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
<a class="reference" href="../../../doc/html/boost_typetraits/category.html#boost_typetraits.transform">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>
<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
@ -111,10 +396,5 @@ either <tt class="docutils literal"><span class="pre">iterator_category</span></
appropriate to the platform, is provided for portability.</p>
</div>
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