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<title>Regular Callable Object</title>
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<div class="titlepage"><div><div><h4 class="title">
<a name="fusion.functional.concepts.reg_callable"></a><a class="link" href="reg_callable.html" title="Regular Callable Object">Regular Callable
        Object</a>
</h4></div></div></div>
<h6>
<a name="fusion.functional.concepts.reg_callable.h0"></a>
          <span><a name="fusion.functional.concepts.reg_callable.description"></a></span><a class="link" href="reg_callable.html#fusion.functional.concepts.reg_callable.description">Description</a>
        </h6>
<p>
          A non-member-pointer <a class="link" href="callable.html" title="Callable Object">Callable
          Object</a> type: A pointer to a function or a class type whose objects
          can appear immediately to the left of a function call operator.
        </p>
<h6>
<a name="fusion.functional.concepts.reg_callable.h1"></a>
          <span><a name="fusion.functional.concepts.reg_callable.refinement_of"></a></span><a class="link" href="reg_callable.html#fusion.functional.concepts.reg_callable.refinement_of">Refinement
          of</a>
        </h6>
<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
              <a class="link" href="callable.html" title="Callable Object">Callable Object</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">F</span></code></span></dt>
<dd><p>
                A possibly const qualified Deferred Callable Object type
              </p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">f</span></code></span></dt>
<dd><p>
                An object or reference to an object of type F
              </p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">A1</span> <span class="special">...</span><span class="identifier">AN</span></code></span></dt>
<dd><p>
                Argument types
              </p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">a1</span> <span class="special">...</span><span class="identifier">aN</span></code></span></dt>
<dd><p>
                Objects or references to objects with types <code class="computeroutput"><span class="identifier">A1</span>
                <span class="special">...</span><span class="identifier">AN</span></code>
              </p></dd>
</dl>
</div>
<h6>
<a name="fusion.functional.concepts.reg_callable.h2"></a>
          <span><a name="fusion.functional.concepts.reg_callable.expression_requirements"></a></span><a class="link" href="reg_callable.html#fusion.functional.concepts.reg_callable.expression_requirements">Expression
          requirements</a>
        </h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                  <p>
                    Expression
                  </p>
                </th>
<th>
                  <p>
                    Return Type
                  </p>
                </th>
<th>
                  <p>
                    Runtime Complexity
                  </p>
                </th>
</tr></thead>
<tbody><tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">f</span><span class="special">(</span><span class="identifier">a1</span><span class="special">,</span>
                    <span class="special">...</span><span class="identifier">aN</span><span class="special">)</span></code>
                  </p>
                </td>
<td>
                  <p>
                    Unspecified
                  </p>
                </td>
<td>
                  <p>
                    Unspecified
                  </p>
                </td>
</tr></tbody>
</table></div>
<h6>
<a name="fusion.functional.concepts.reg_callable.h3"></a>
          <span><a name="fusion.functional.concepts.reg_callable.models"></a></span><a class="link" href="reg_callable.html#fusion.functional.concepts.reg_callable.models">Models</a>
        </h6>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
              function pointer types
            </li>
<li class="listitem">
              all kinds of function objects
            </li>
</ul></div>
<h6>
<a name="fusion.functional.concepts.reg_callable.h4"></a>
          <span><a name="fusion.functional.concepts.reg_callable.examples"></a></span><a class="link" href="reg_callable.html#fusion.functional.concepts.reg_callable.examples">Examples</a>
        </h6>
<pre class="programlisting"><span class="special">&amp;</span> <span class="identifier">a_free_function</span>
<span class="special">&amp;</span> <span class="identifier">a_class</span><span class="special">::</span><span class="identifier">a_static_member_function</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">less</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;()</span>
<span class="comment">// using namespace boost;</span>
<span class="identifier">bind</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">less</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;(),</span> <span class="identifier">_1</span><span class="special">,</span> <span class="number">5</span><span class="special">)</span>
<span class="identifier">lambda</span><span class="special">::</span><span class="identifier">_1</span> <span class="special">+=</span> <span class="identifier">lambda</span><span class="special">::</span><span class="identifier">_2</span><span class="special">;</span>
<span class="identifier">fusion</span><span class="special">::</span><a class="link" href="../generation/functions/mk_fused_fobj.html" title="make_fused_function_object"><code class="computeroutput"><span class="identifier">make_fused_function_object</span></code></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">less</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;())</span>
</pre>
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