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Joel de Guzman
2008-07-08 02:43:21 +00:00
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doc/html/fusion/sequence/intrinsic/functions/begin.html
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>begin</title>
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<link rel="start" href="../../../../index.html" title="Chapter<65>1.<2E>Fusion 2.0">
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@ -12,10 +12,10 @@
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@ -24,31 +24,30 @@
</div>
<div class="section" lang="en">
<div class="titlepage"><div><div><h5 class="title">
<a name="fusion.sequence.intrinsic.functions.begin"></a><a class="link" href="begin.html" title="begin">begin</a>
</h5></div></div></div>
<a name="fusion.sequence.intrinsic.functions.begin"></a><a href="begin.html" title="begin">begin</a></h5></div></div></div>
<a name="fusion.sequence.intrinsic.functions.begin.description"></a><h6>
<a name="id2672288"></a>
<a class="link" href="begin.html#fusion.sequence.intrinsic.functions.begin.description">Description</a>
<a name="id497883"></a>
<a href="begin.html#fusion.sequence.intrinsic.functions.begin.description">Description</a>
</h6>
<p>
Returns an iterator pointing to the first element in the sequence.
</p>
<a name="fusion.sequence.intrinsic.functions.begin.synopsis"></a><h6>
<a name="id2672316"></a>
<a class="link" href="begin.html#fusion.sequence.intrinsic.functions.begin.synopsis">Synopsis</a>
<a name="id497914"></a>
<a href="begin.html#fusion.sequence.intrinsic.functions.begin.synopsis">Synopsis</a>
</h6>
<pre class="programlisting">
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Sequence</span><span class="special">&gt;</span>
<span class="keyword">typename</span> <a class="link" href="../metafunctions/begin.html" title="begin"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">begin</span></code></a><span class="special">&lt;</span><span class="identifier">Sequence</span><span class="special">&gt;::</span><span class="identifier">type</span>
<span class="keyword">typename</span> <a href="../metafunctions/begin.html" title="begin"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">begin</span></tt></a><span class="special">&lt;</span><span class="identifier">Sequence</span><span class="special">&gt;::</span><span class="identifier">type</span>
<span class="identifier">begin</span><span class="special">(</span><span class="identifier">Sequence</span><span class="special">&amp;</span> <span class="identifier">seq</span><span class="special">);</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Sequence</span><span class="special">&gt;</span>
<span class="keyword">typename</span> <a class="link" href="../metafunctions/begin.html" title="begin"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">begin</span></code></a><span class="special">&lt;</span><span class="identifier">Sequence</span> <span class="keyword">const</span><span class="special">&gt;::</span><span class="identifier">type</span>
<span class="keyword">typename</span> <a href="../metafunctions/begin.html" title="begin"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">begin</span></tt></a><span class="special">&lt;</span><span class="identifier">Sequence</span> <span class="keyword">const</span><span class="special">&gt;::</span><span class="identifier">type</span>
<span class="identifier">begin</span><span class="special">(</span><span class="identifier">Sequence</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">seq</span><span class="special">);</span>
</pre>
<a name="fusion.sequence.intrinsic.functions.begin.parameters"></a><h6>
<a name="id2672562"></a>
<a class="link" href="begin.html#fusion.sequence.intrinsic.functions.begin.parameters">Parameters</a>
<a name="id498191"></a>
<a href="begin.html#fusion.sequence.intrinsic.functions.begin.parameters">Parameters</a>
</h6>
<div class="informaltable"><table class="table">
<colgroup>
@ -76,12 +75,13 @@
<tbody><tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">seq</span></code>
<tt class="computeroutput"><span class="identifier">seq</span></tt>
</p>
</td>
<td>
<p>
Model of <a class="link" href="../../concepts/forward_sequence.html" title="Forward Sequence">Forward
Model of <a href="../../concepts/forward_sequence.html" title="Forward
Sequence">Forward
Sequence</a>
</p>
</td>
@ -93,44 +93,50 @@
</tr></tbody>
</table></div>
<a name="fusion.sequence.intrinsic.functions.begin.expression_semantics"></a><h6>
<a name="id2672666"></a>
<a class="link" href="begin.html#fusion.sequence.intrinsic.functions.begin.expression_semantics">Expression
<a name="id498306"></a>
<a href="begin.html#fusion.sequence.intrinsic.functions.begin.expression_semantics">Expression
Semantics</a>
</h6>
<pre class="programlisting">
<span class="identifier">begin</span><span class="special">(</span><span class="identifier">seq</span><span class="special">);</span>
</pre>
<p>
<span class="bold"><strong>Return type</strong></span>: <a class="link" href="../../../iterator/concepts/forward_iterator.html" title="Forward Iterator">Forward
Iterator</a> if <code class="computeroutput"><span class="identifier">seq</span></code>
is a <a class="link" href="../../concepts/forward_sequence.html" title="Forward Sequence">Forward
Sequence</a> else, <a class="link" href="../../../iterator/concepts/bidirectional_iterator.html" title="Bidirectional Iterator">Bidirectional
Iterator</a> if <code class="computeroutput"><span class="identifier">seq</span></code>
is a <a class="link" href="../../concepts/bidirectional_sequence.html" title="Bidirectional Sequence">Bidirectional
Sequence</a> else, <a class="link" href="../../../iterator/concepts/random_access_iterator.html" title="Random Access Iterator">Random
Access Iterator</a> if <code class="computeroutput"><span class="identifier">seq</span></code>
is a <a class="link" href="../../concepts/random_access_sequence.html" title="Random Access Sequence">Random
<span class="bold"><b>Return type</b></span>: <a href="../../../iterator/concepts/forward_iterator.html" title="Forward
Iterator">Forward
Iterator</a> if <tt class="computeroutput"><span class="identifier">seq</span></tt>
is a <a href="../../concepts/forward_sequence.html" title="Forward
Sequence">Forward
Sequence</a> else, <a href="../../../iterator/concepts/bidirectional_iterator.html" title="Bidirectional
Iterator">Bidirectional
Iterator</a> if <tt class="computeroutput"><span class="identifier">seq</span></tt>
is a <a href="../../concepts/bidirectional_sequence.html" title="Bidirectional
Sequence">Bidirectional
Sequence</a> else, <a href="../../../iterator/concepts/random_access_iterator.html" title="Random
Access Iterator">Random
Access Iterator</a> if <tt class="computeroutput"><span class="identifier">seq</span></tt>
is a <a href="../../concepts/random_access_sequence.html" title="Random
Access Sequence">Random
Access Sequence</a>.
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Returns an iterator pointing
<span class="bold"><b>Semantics</b></span>: Returns an iterator pointing
to the first element in the sequence.
</p>
<a name="fusion.sequence.intrinsic.functions.begin.header"></a><h6>
<a name="id2672820"></a>
<a class="link" href="begin.html#fusion.sequence.intrinsic.functions.begin.header">Header</a>
<a name="id498476"></a>
<a href="begin.html#fusion.sequence.intrinsic.functions.begin.header">Header</a>
</h6>
<pre class="programlisting">
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">sequence</span><span class="special">/</span><span class="identifier">intrinsic</span><span class="special">/</span><span class="identifier">begin</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">include</span><span class="special">/</span><span class="identifier">begin</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<a name="fusion.sequence.intrinsic.functions.begin.example"></a><h6>
<a name="id2672971"></a>
<a class="link" href="begin.html#fusion.sequence.intrinsic.functions.begin.example">Example</a>
<a name="id498647"></a>
<a href="begin.html#fusion.sequence.intrinsic.functions.begin.example">Example</a>
</h6>
<pre class="programlisting">
<a class="link" href="../../../container/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">v</span><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="number">2</span><span class="special">,</span> <span class="number">3</span><span class="special">);</span>
<span class="identifier">assert</span><span class="special">(</span><a class="link" href="../../../iterator/functions/deref.html" title="deref"><code class="computeroutput"><span class="identifier">deref</span></code></a><span class="special">(</span><span class="identifier">begin</span><span class="special">(</span><span class="identifier">v</span><span class="special">))</span> <span class="special">==</span> <span class="number">1</span><span class="special">);</span>
<a href="../../../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">v</span><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="number">2</span><span class="special">,</span> <span class="number">3</span><span class="special">);</span>
<span class="identifier">assert</span><span class="special">(</span><a href="../../../iterator/functions/deref.html" title="deref"><tt class="computeroutput"><span class="identifier">deref</span></tt></a><span class="special">(</span><span class="identifier">begin</span><span class="special">(</span><span class="identifier">v</span><span class="special">))</span> <span class="special">==</span> <span class="number">1</span><span class="special">);</span>
</pre>
</div>
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