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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="./insert.html" class="navigation-link">insert</a></td>
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<div class="section" id="insert">
<h1><a class="toc-backref" href="./intrinsic-metafunctions.html#id1436">insert</a></h1>
<div class="section" id="id274">
<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
<pre class="literal-block">
template&lt;
      typename Sequence
    , typename Pos
    , typename T
    &gt;
struct <a href="./insert.html" class="identifier">insert</a>
{
    typedef <em>unspecified</em> type;
};


template&lt;
      typename Sequence
    , typename T
    &gt;
struct <a href="./insert.html" class="identifier">insert</a>
{
    typedef <em>unspecified</em> type;
};
</pre>
</div>
<div class="section" id="id275">
<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
<p><tt class="literal"><span class="pre"><a href="./insert.html" class="identifier">insert</a></span></tt> is an <a class="reference internal" href="./terminology.html#overloaded-name">overloaded name</a>:</p>
<ul class="simple">
<li><tt class="literal"><span class="pre"><a href="./insert.html" class="identifier">insert</a>&lt;Sequence,Pos,T&gt;</span></tt> performs an insertion of
type <tt class="literal"><span class="pre">T</span></tt> at an arbitrary position <tt class="literal"><span class="pre">Pos</span></tt> in <tt class="literal"><span class="pre">Sequence</span></tt>. <tt class="literal"><span class="pre">Pos</span></tt> is ignored is
<tt class="literal"><span class="pre">Sequence</span></tt> is a model of <a class="reference internal" href="./extensible-associative-sequence.html">Extensible Associative Sequence</a>.</li>
<li><tt class="literal"><span class="pre"><a href="./insert.html" class="identifier">insert</a>&lt;Sequence,T&gt;</span></tt> is a shortcut notation for <tt class="literal"><span class="pre"><a href="./insert.html" class="identifier">insert</a>&lt;Sequence,Pos,T&gt;</span></tt> for the
case when <tt class="literal"><span class="pre">Sequence</span></tt> is a model of <a class="reference internal" href="./extensible-associative-sequence.html">Extensible Associative Sequence</a>.</li>
</ul>
</div>
<div class="section" id="id276">
<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
<pre class="literal-block">
#include &lt;<a href="../../../../boost/mpl/insert.hpp" class="header">boost/mpl/insert.hpp</a>&gt;
</pre>
</div>
<div class="section" id="id277">
<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="id278">
<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
<table border="1" class="docutils table">
<colgroup>
<col width="15%" />
<col width="36%" />
<col width="48%" />
</colgroup>
<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="./extensible-sequence.html">Extensible Sequence</a> or
<a class="reference internal" href="./extensible-associative-sequence.html">Extensible Associative Sequence</a></td>
<td>A sequence to insert into.</td>
</tr>
<tr><td><tt class="literal"><span class="pre">Pos</span></tt></td>
<td><a class="reference internal" href="./forward-iterator.html">Forward Iterator</a></td>
<td>An iterator in <tt class="literal"><span class="pre">Sequence</span></tt> specifying the
insertion position.</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="id279">
<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
<div class="expression-semantics compound">
<p class="compound-first">For any <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a> <tt class="literal"><span class="pre">s</span></tt>, iterator <tt class="literal"><span class="pre">pos</span></tt> in <tt class="literal"><span class="pre">s</span></tt>, and arbitrary type <tt class="literal"><span class="pre">x</span></tt>:</p>
<pre class="compound-middle literal-block">
typedef <a href="./insert.html" class="identifier">insert</a>&lt;s,pos,x&gt;::type r;
</pre>
<table class="compound-last 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="./extensible-sequence.html">Extensible Sequence</a></p>
</td>
</tr>
<tr class="field"><th class="field-name">Precondition:</th><td class="field-body"><p class="first"><tt class="literal"><span class="pre">pos</span></tt> is an iterator in <tt class="literal"><span class="pre">s</span></tt>.</p>
</td>
</tr>
<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first"><tt class="literal"><span class="pre">r</span></tt> is a sequence, <a class="reference internal" href="./terminology.html#concept-identical">concept-identical</a> to <tt class="literal"><span class="pre">s</span></tt>, of the following elements:
[<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a>&lt;s&gt;::type</span></tt>, <tt class="literal"><span class="pre">pos</span></tt>), <tt class="literal"><span class="pre">x</span></tt>, [<tt class="literal"><span class="pre">pos</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a>&lt;s&gt;::type</span></tt>).</p>
</td>
</tr>
<tr class="field"><th class="field-name">Postcondition:</th><td class="field-body"><p class="first">The relative order of the elements in <tt class="literal"><span class="pre">r</span></tt> is the same as in <tt class="literal"><span class="pre">s</span></tt>.</p>
<pre class="literal-block">
<a href="./at.html" class="identifier">at</a>&lt; r, <a href="./distance.html" class="identifier">distance</a>&lt; <a href="./begin.html" class="identifier">begin</a>&lt;s&gt;::type,pos &gt;::type &gt;::type
</pre>
<p>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>&lt;r&gt;::value == <a href="./size.html" class="identifier">size</a>&lt;s&gt;::value + 1;
</pre>
</td>
</tr>
</tbody>
</table>
</div>
<div class="expression-semantics compound">
<p class="compound-first">For any <a class="reference internal" href="./extensible-associative-sequence.html">Extensible Associative Sequence</a> <tt class="literal"><span class="pre">s</span></tt>, iterator <tt class="literal"><span class="pre">pos</span></tt> in <tt class="literal"><span class="pre">s</span></tt>,
and arbitrary type <tt class="literal"><span class="pre">x</span></tt>:</p>
<pre class="compound-middle literal-block">
typedef <a href="./insert.html" class="identifier">insert</a>&lt;s,x&gt;::type r;
</pre>
<table class="compound-middle 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"><a class="reference internal" href="./extensible-associative-sequence.html">Extensible Associative Sequence</a></td>
</tr>
<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><tt class="literal"><span class="pre">r</span></tt> is <a class="reference internal" href="./terminology.html#concept-identical">concept-identical</a> and equivalent to <tt class="literal"><span class="pre">s</span></tt>, except that
<tt class="literal"><span class="pre"><a href="./at.html" class="identifier">at</a>&lt;</span> <span class="pre">r,</span> <span class="pre"><a href="./key-type.html" class="identifier">key_type</a>&lt;s,x&gt;::type</span> <span class="pre">&gt;::type</span></tt> is identical to <tt class="literal"><span class="pre"><a href="./value-type.html" class="identifier">value_type</a>&lt;s,x&gt;::type</span></tt>.</td>
</tr>
<tr class="field"><th class="field-name">Postcondition:</th><td class="field-body"><tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a>&lt;r&gt;::value</span> <span class="pre">==</span> <span class="pre"><a href="./size.html" class="identifier">size</a>&lt;s&gt;::value</span> <span class="pre">+</span> <span class="pre">1</span></tt>.</td>
</tr>
</tbody>
</table>
<!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -->
<pre class="compound-middle literal-block">
typedef <a href="./insert.html" class="identifier">insert</a>&lt;s,pos,x&gt;::type r;
</pre>
<table class="compound-last 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"><a class="reference internal" href="./extensible-associative-sequence.html">Extensible Associative Sequence</a></td>
</tr>
<tr class="field"><th class="field-name">Precondition:</th><td class="field-body"><tt class="literal"><span class="pre">pos</span></tt> is an iterator in <tt class="literal"><span class="pre">s</span></tt>.</td>
</tr>
<tr class="field"><th class="field-name">Semantics:</th><td class="field-body">Equivalent to <tt class="literal"><span class="pre">typedef</span> <span class="pre"><a href="./insert.html" class="identifier">insert</a>&lt;s,x&gt;::type</span> <span class="pre">r</span></tt>; <tt class="literal"><span class="pre">pos</span></tt> is ignored.</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section" id="id280">
<h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3>
<table border="1" class="docutils table">
<colgroup>
<col width="45%" />
<col width="55%" />
</colgroup>
<thead valign="bottom">
<tr><th class="head">Sequence archetype</th>
<th class="head">Complexity</th>
</tr>
</thead>
<tbody valign="top">
<tr><td><a class="reference internal" href="./extensible-associative-sequence.html">Extensible Associative Sequence</a></td>
<td>Amortized constant time.</td>
</tr>
<tr><td><a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a></td>
<td>Linear in the worst case, or amortized
constant time.</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="id281">
<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>&lt;int,0,1,3,4,5,6,7,8,9&gt; numbers;
typedef <a href="./find.html" class="identifier">find</a>&lt; numbers,<a href="./integral-c.html" class="identifier">integral_c</a>&lt;int,3&gt; &gt;::type pos;
typedef <a href="./insert.html" class="identifier">insert</a>&lt; numbers,pos,<a href="./integral-c.html" class="identifier">integral_c</a>&lt;int,2&gt; &gt;::type range;

<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( <a href="./size.html" class="identifier">size</a>&lt;range&gt;::value, ==, 10 );
<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( <a href="./equal.html" class="identifier">equal</a>&lt; range,<a href="./range-c.html" class="identifier">range_c</a>&lt;int,0,10&gt; > ));
</pre>
<pre class="literal-block">
typedef <a href="./map.html" class="identifier">map</a>&lt; mpl::<a href="./pair.html" class="identifier">pair</a>&lt;int,unsigned&gt; &gt; m;
typedef <a href="./insert.html" class="identifier">insert</a>&lt;m,mpl::<a href="./pair.html" class="identifier">pair</a>&lt;char,long&gt; &gt;::type m1;

<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( <a href="./size.html" class="identifier">size</a>&lt;m1&gt;::value, ==, 2 );
<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same&lt; <a href="./at.html" class="identifier">at</a>&lt;m1,int&gt;::type,unsigned &gt; ));
<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same&lt; <a href="./at.html" class="identifier">at</a>&lt;m1,char&gt;::type,long > ));
</pre>
</div>
<div class="section" id="id282">
<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
<p><a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>, <a class="reference internal" href="./extensible-associative-sequence.html">Extensible Associative Sequence</a>, <a class="reference internal" href="./insert-range.html">insert_range</a>, <a class="reference internal" href="./push-front.html">push_front</a>, <a class="reference internal" href="./push-back.html">push_back</a>, <a class="reference internal" href="./erase.html">erase</a></p>
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