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<title>iterator_range</title>
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<div class="section" lang="en">
<div class="titlepage"><div><div><h4 class="title">
<a name="fusion.sequences.views.iterator_range"></a><a href="iterator_range.html" title="iterator_range">iterator_range</a></h4></div></div></div>
<a name="fusion.sequences.views.iterator_range.description"></a><h5>
<a name="id976940"></a>
<a href="iterator_range.html#fusion.sequences.views.iterator_range.description">Description</a>
</h5>
<p>
<code class="computeroutput"><span class="identifier">iterator_range</span></code> presents
a sub-range of its underlying sequence delimited by a pair of iterators.
</p>
<a name="fusion.sequences.views.iterator_range.header"></a><h5>
<a name="id976978"></a>
<a href="iterator_range.html#fusion.sequences.views.iterator_range.header">Header</a>
</h5>
<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">view</span><span class="special">/</span><span class="identifier">iterator_range</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<a name="fusion.sequences.views.iterator_range.synopsis"></a><h5>
<a name="id977069"></a>
<a href="iterator_range.html#fusion.sequences.views.iterator_range.synopsis">Synopsis</a>
</h5>
<pre class="programlisting">
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">First</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Last</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">iterator_range</span><span class="special">;</span>
</pre>
<a name="fusion.sequences.views.iterator_range.template_parameters"></a><h5>
<a name="id977154"></a>
<a href="iterator_range.html#fusion.sequences.views.iterator_range.template_parameters">Template
parameters</a>
</h5>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>Parameter</th>
<th>Description</th>
<th>Default</th>
</tr></thead>
<tbody>
<tr>
<td><code class="computeroutput"><span class="identifier">First</span></code></td>
<td>A
fusion <a href="../../iterators.html" title="Iterators">Iterator</a>
</td>
<td> </td>
</tr>
<tr>
<td><code class="computeroutput"><span class="identifier">Last</span></code></td>
<td>A
fusion <a href="../../iterators.html" title="Iterators">Iterator</a>
</td>
<td> </td>
</tr>
</tbody>
</table></div>
<a name="fusion.sequences.views.iterator_range.model_of"></a><h5>
<a name="id977252"></a>
<a href="iterator_range.html#fusion.sequences.views.iterator_range.model_of">Model of</a>
</h5>
<div class="itemizedlist"><ul type="disc"><li><a href="../concepts/forward_sequence.html" title="Forward
Sequence">Forward Sequence</a></li></ul></div>
<div class="variablelist">
<p class="title"><b>Notation</b></p>
<dl>
<dt><span class="term"><code class="computeroutput"><span class="identifier">IR</span></code></span></dt>
<dd>
An <code class="computeroutput"><span class="identifier">iterator_range</span></code> type
</dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">f</span></code></span></dt>
<dd>
An instance of <code class="computeroutput"><span class="identifier">First</span></code>
</dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">l</span></code></span></dt>
<dd>
An instance of <code class="computeroutput"><span class="identifier">Last</span></code>
</dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">ir</span></code>,
<code class="computeroutput"><span class="identifier">ir2</span></code></span></dt>
<dd>
Instances of <code class="computeroutput"><span class="identifier">iterator_range</span></code>
</dd>
</dl>
</div>
<a name="fusion.sequences.views.iterator_range.expression_semantics"></a><h5>
<a name="id977402"></a>
<a href="iterator_range.html#fusion.sequences.views.iterator_range.expression_semantics">Expression
Semantics</a>
</h5>
<p>
Semantics of an expression is defined only where it differs from, or is
not defined in <a href="../concepts/forward_sequence.html" title="Forward
Sequence">Forward
Sequence</a>.
</p>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>Expression</th>
<th>Semantics</th>
</tr></thead>
<tbody>
<tr>
<td><code class="computeroutput"><span class="identifier">IR</span><span class="special">(</span><span class="identifier">f</span><span class="special">,</span> <span class="identifier">l</span><span class="special">)</span></code></td>
<td>Creates
an <code class="computeroutput"><span class="identifier">iterator_range</span></code>
given iterators, <code class="computeroutput"><span class="identifier">f</span></code>
and <code class="computeroutput"><span class="identifier">l</span></code>.</td>
</tr>
<tr>
<td><code class="computeroutput"><span class="identifier">IR</span><span class="special">(</span><span class="identifier">ir</span><span class="special">)</span></code></td>
<td>Copy
constructs an <code class="computeroutput"><span class="identifier">iterator_range</span></code>
from another <code class="computeroutput"><span class="identifier">iterator_range</span></code>,
<code class="computeroutput"><span class="identifier">ir</span></code>.</td>
</tr>
<tr>
<td><code class="computeroutput"><span class="identifier">ir</span> <span class="special">=</span>
<span class="identifier">ir2</span></code></td>
<td>Assigns
to a <code class="computeroutput"><span class="identifier">iterator_range</span></code>,
<code class="computeroutput"><span class="identifier">ir</span></code>, from another
<code class="computeroutput"><span class="identifier">iterator_range</span></code>,
<code class="computeroutput"><span class="identifier">ir2</span></code>.</td>
</tr>
</tbody>
</table></div>
<a name="fusion.sequences.views.iterator_range.example"></a><h5>
<a name="id977648"></a>
<a href="iterator_range.html#fusion.sequences.views.iterator_range.example">Example</a>
</h5>
<pre class="programlisting">
<span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">s</span> <span class="special">=</span> <span class="string">"Ruby"</span><span class="special">;</span>
<span class="keyword">typedef</span> <a href="../containers/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">char</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">char</span> <span class="keyword">const</span><span class="special">*&gt;</span> <span class="identifier">vector_type</span><span class="special">;</span>
<span class="identifier">vector_type</span> <span class="identifier">vec</span><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="char">'x'</span><span class="special">,</span> <span class="number">3.3</span><span class="special">,</span> <span class="identifier">s</span><span class="special">);</span>
<span class="keyword">typedef</span> <a href="../intrinsics/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">vector_type</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">A</span><span class="special">;</span>
<span class="keyword">typedef</span> <a href="../intrinsics/metafunctions/end.html" title="end"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">end</span></code></a><span class="special">&lt;</span><span class="identifier">vector_type</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">B</span><span class="special">;</span>
<span class="keyword">typedef</span> <a href="../../iterators/metafunctions/next.html" title="next"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">next</span></code></a><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">C</span><span class="special">;</span>
<span class="keyword">typedef</span> <a href="../../iterators/metafunctions/prior.html" title="prior"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">prior</span></code></a><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">D</span><span class="special">;</span>
<span class="identifier">C</span> <span class="identifier">c</span><span class="special">(</span><span class="identifier">vec</span><span class="special">);</span>
<span class="identifier">D</span> <span class="identifier">d</span><span class="special">(</span><span class="identifier">vec</span><span class="special">);</span>
<span class="identifier">iterator_range</span><span class="special">&lt;</span><span class="identifier">C</span><span class="special">,</span> <span class="identifier">D</span><span class="special">&gt;</span> <span class="identifier">range</span><span class="special">(</span><span class="identifier">c</span><span class="special">,</span> <span class="identifier">d</span><span class="special">);</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">range</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
</pre>
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