boost_fusion/doc/html/fusion/sequences/views/iterator_range.html

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<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="id507438"></a>
          <a href="iterator_range.html#fusion.sequences.views.iterator_range.description">Description</a>
        </h5>
<p>
          <tt class="computeroutput"><span class="identifier">iterator_range</span></tt> 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="id507482"></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="id507588"></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="id507686"></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>
                <p>
                  Parameter
                </p>
                </th>
<th>
                <p>
                  Description
                </p>
                </th>
<th>
                <p>
                  Default
                </p>
                </th>
</tr></thead>
<tbody>
<tr>
<td>
                <p>
                  <tt class="computeroutput"><span class="identifier">First</span></tt>
                </p>
                </td>
<td>
                <p>
                  A fusion <a href="../../iterators.html" title="Iterators">Iterator</a>
                </p>
                </td>
<td>
                <p>
                </p>
                </td>
</tr>
<tr>
<td>
                <p>
                  <tt class="computeroutput"><span class="identifier">Last</span></tt>
                </p>
                </td>
<td>
                <p>
                  A fusion <a href="../../iterators.html" title="Iterators">Iterator</a>
                </p>
                </td>
<td>
                <p>
                </p>
                </td>
</tr>
</tbody>
</table></div>
<a name="fusion.sequences.views.iterator_range.model_of"></a><h5>
<a name="id507844"></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>,
            <a href="../concepts/bidirectional_sequence.html" title="Bidirectional
        Sequence">Bidirectional
            Sequence</a> or <a href="../concepts/random_access_sequence.html" title="Random
        Access Sequence">Random
            Access Sequence</a> depending on the traversal characteristics (see
            <a href="../concepts.html#fusion.sequences.concepts.traversal">Sequence Traversal
            Concept</a>) of its underlying sequence.
          </li></ul></div>
<div class="variablelist">
<p class="title"><b>Notation</b></p>
<dl>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">IR</span></tt></span></dt>
<dd><p>
              An <tt class="computeroutput"><span class="identifier">iterator_range</span></tt> type
            </p></dd>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">f</span></tt></span></dt>
<dd><p>
              An instance of <tt class="computeroutput"><span class="identifier">First</span></tt>
            </p></dd>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">l</span></tt></span></dt>
<dd><p>
              An instance of <tt class="computeroutput"><span class="identifier">Last</span></tt>
            </p></dd>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">ir</span></tt>,
          <tt class="computeroutput"><span class="identifier">ir2</span></tt></span></dt>
<dd><p>
              Instances of <tt class="computeroutput"><span class="identifier">iterator_range</span></tt>
            </p></dd>
</dl>
</div>
<a name="fusion.sequences.views.iterator_range.expression_semantics"></a><h5>
<a name="id508074"></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>
                <p>
                  Expression
                </p>
                </th>
<th>
                <p>
                  Semantics
                </p>
                </th>
</tr></thead>
<tbody>
<tr>
<td>
                <p>
                  <tt 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></tt>
                </p>
                </td>
<td>
                <p>
                  Creates an <tt class="computeroutput"><span class="identifier">iterator_range</span></tt>
                  given iterators, <tt class="computeroutput"><span class="identifier">f</span></tt>
                  and <tt class="computeroutput"><span class="identifier">l</span></tt>.
                </p>
                </td>
</tr>
<tr>
<td>
                <p>
                  <tt class="computeroutput"><span class="identifier">IR</span><span class="special">(</span><span class="identifier">ir</span><span class="special">)</span></tt>
                </p>
                </td>
<td>
                <p>
                  Copy constructs an <tt class="computeroutput"><span class="identifier">iterator_range</span></tt>
                  from another <tt class="computeroutput"><span class="identifier">iterator_range</span></tt>,
                  <tt class="computeroutput"><span class="identifier">ir</span></tt>.
                </p>
                </td>
</tr>
<tr>
<td>
                <p>
                  <tt class="computeroutput"><span class="identifier">ir</span> <span class="special">=</span>
                  <span class="identifier">ir2</span></tt>
                </p>
                </td>
<td>
                <p>
                  Assigns to a <tt class="computeroutput"><span class="identifier">iterator_range</span></tt>,
                  <tt class="computeroutput"><span class="identifier">ir</span></tt>, from another
                  <tt class="computeroutput"><span class="identifier">iterator_range</span></tt>,
                  <tt class="computeroutput"><span class="identifier">ir2</span></tt>.
                </p>
                </td>
</tr>
</tbody>
</table></div>
<a name="fusion.sequences.views.iterator_range.example"></a><h5>
<a name="id508412"></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"><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">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"><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">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"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">end</span></tt></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"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">next</span></tt></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"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">prior</span></tt></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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