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| <title>The MPL Reference Manual: push_back</title> |
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| <td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./sequences.html" class="navigation-link">Sequences</a> / <a href="./intrinsic-metafunctions.html" class="navigation-link">Intrinsic Metafunctions</a> / <a href="./push-back.html" class="navigation-link">push_back</a></td> |
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| <div class="section" id="push-back"> |
| <h1><a class="toc-backref" href="./intrinsic-metafunctions.html#id1443">push_back</a></h1> |
| <div class="section" id="id336"> |
| <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3> |
| <pre class="literal-block"> |
| template< |
| typename Sequence |
| , typename T |
| > |
| struct <a href="./push-back.html" class="identifier">push_back</a> |
| { |
| typedef <em>unspecified</em> type; |
| }; |
| </pre> |
| </div> |
| <div class="section" id="id337"> |
| <h3><a class="subsection-title" href="#description" name="description">Description</a></h3> |
| <p><tt class="literal"><span class="pre"><a href="./push-back.html" class="identifier">push_back</a></span></tt> performs an insertion at the end of the sequence with guaranteed <em>O(1)</em> |
| complexity.</p> |
| </div> |
| <div class="section" id="id338"> |
| <h3><a class="subsection-title" href="#header" name="header">Header</a></h3> |
| <pre class="literal-block"> |
| #include <<a href="../../../../boost/mpl/push_back.hpp" class="header">boost/mpl/push_back.hpp</a>> |
| </pre> |
| </div> |
| <div class="section" id="id339"> |
| <h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3> |
| <p><a class="reference internal" href="./tag-dispatched-metafunction.html">Tag Dispatched Metafunction</a></p> |
| </div> |
| <div class="section" id="id340"> |
| <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3> |
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| <thead valign="bottom"> |
| <tr><th class="head">Parameter</th> |
| <th class="head">Requirement</th> |
| <th class="head">Description</th> |
| </tr> |
| </thead> |
| <tbody valign="top"> |
| <tr><td><tt class="literal"><span class="pre">Sequence</span></tt></td> |
| <td><a class="reference internal" href="./back-extensible-sequence.html">Back Extensible Sequence</a></td> |
| <td>A sequence to insert into.</td> |
| </tr> |
| <tr><td><tt class="literal"><span class="pre">T</span></tt></td> |
| <td>Any type</td> |
| <td>The element to be inserted.</td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="section" id="id341"> |
| <h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3> |
| <p>For any <a class="reference internal" href="./back-extensible-sequence.html">Back Extensible Sequence</a> <tt class="literal"><span class="pre">s</span></tt> and arbitrary type <tt class="literal"><span class="pre">x</span></tt>:</p> |
| <pre class="literal-block"> |
| typedef <a href="./push-back.html" class="identifier">push_back</a><s,x>::type r; |
| </pre> |
| <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">Return type:</th><td class="field-body"><p class="first"><a class="reference internal" href="./back-extensible-sequence.html">Back Extensible Sequence</a>.</p> |
| </td> |
| </tr> |
| <tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p> |
| <pre class="literal-block"> |
| typedef <a href="./insert.html" class="identifier">insert</a>< s,<a href="./end.html" class="identifier">end</a><s>::type,x >::type r; |
| </pre> |
| </td> |
| </tr> |
| <tr class="field"><th class="field-name">Postcondition:</th><td class="field-body"><p class="first"><tt class="literal"><span class="pre"><a href="./back.html" class="identifier">back</a><r>::type</span></tt> is identical to <tt class="literal"><span class="pre">x</span></tt>;</p> |
| <pre class="last literal-block"> |
| <a href="./size.html" class="identifier">size</a><r>::value == <a href="./size.html" class="identifier">size</a><s>::value + 1 |
| </pre> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="section" id="id342"> |
| <h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3> |
| <p>Amortized constant time.</p> |
| </div> |
| <div class="section" id="id343"> |
| <h3><a class="subsection-title" href="#example" name="example">Example</a></h3> |
| <pre class="literal-block"> |
| typedef <a href="./vector-c.html" class="identifier">vector_c</a><bool,false,false,false, |
| true,true,true,false,false> bools; |
| |
| typedef <a href="./push-back.html" class="identifier">push_back</a><bools,<a href="./bool.html" class="identifier">false_</a>>::type message; |
| |
| <a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( <a href="./back.html" class="identifier">back</a><message>::type::value, ==, false ); |
| <a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( |
| ( <a href="./count-if.html" class="identifier">count_if</a><message, <a href="./equal-to.html" class="identifier">equal_to</a><<a href="./placeholders.html" class="identifier">_1</a>,<a href="./bool.html" class="identifier">false_</a>> >::value ), ==, 6 |
| ); |
| </pre> |
| </div> |
| <div class="section" id="id344"> |
| <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3> |
| <p><a class="reference internal" href="./back-extensible-sequence.html">Back Extensible Sequence</a>, <a class="reference internal" href="./insert.html">insert</a>, <a class="reference internal" href="./pop-back.html">pop_back</a>, <a class="reference internal" href="./back.html">back</a>, <a class="reference internal" href="./push-front.html">push_front</a></p> |
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