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| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="fusion.functional.concepts.def_callable"></a><a class="link" href="def_callable.html" title="Deferred Callable Object">Deferred Callable |
| Object</a> |
| </h4></div></div></div> |
| <a name="fusion.functional.concepts.def_callable.description"></a><h6> |
| <a name="id1072754"></a> |
| <a class="link" href="def_callable.html#fusion.functional.concepts.def_callable.description">Description</a> |
| </h6> |
| <p> |
| <a class="link" href="callable.html" title="Callable Object">Callable Object</a> |
| types that work with <a href="http://www.boost.org/libs/utility/utility.htm#result_of" target="_top">Boost.ResultOf</a> |
| to determine the result of a call. |
| </p> |
| <a name="fusion.functional.concepts.def_callable.refinement_of"></a><h6> |
| <a name="id1072780"></a> |
| <a class="link" href="def_callable.html#fusion.functional.concepts.def_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> |
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| <div class="sidebar"> |
| <p class="title"><b></b></p> |
| <p> |
| note Once C++ supports the <code class="literal">decltype</code> keyword, all models |
| of <a class="link" href="callable.html" title="Callable Object">Callable Object</a> |
| will also be models of <a class="link" href="def_callable.html" title="Deferred Callable Object">Deferred |
| Callable Object</a>, because function objects won't need client-side |
| support for <code class="computeroutput"><span class="identifier">result_of</span></code>. |
| </p> |
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| <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">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> |
| <dt><span class="term"><code class="computeroutput"><span class="identifier">T1</span> <span class="special">...</span><span class="identifier">TN</span></code></span></dt> |
| <dd><p> |
| <code class="computeroutput"><span class="identifier">T</span></code>i is <code class="computeroutput"><span class="identifier">A</span></code>i <code class="computeroutput"><span class="special">&</span></code> |
| if <code class="computeroutput"><span class="identifier">a</span></code>i is an LValue, |
| same as <code class="computeroutput"><span class="identifier">A</span></code>i, otherwise |
| </p></dd> |
| </dl> |
| </div> |
| <a name="fusion.functional.concepts.def_callable.expression_requirements"></a><h6> |
| <a name="id1074926"></a> |
| <a class="link" href="def_callable.html#fusion.functional.concepts.def_callable.expression_requirements">Expression |
| requirements</a> |
| </h6> |
| <div class="informaltable"><table class="table"> |
| <colgroup> |
| <col> |
| <col> |
| </colgroup> |
| <thead><tr> |
| <th> |
| <p> |
| Expression |
| </p> |
| </th> |
| <th> |
| <p> |
| Type |
| </p> |
| </th> |
| </tr></thead> |
| <tbody><tr> |
| <td> |
| <p> |
| <a href="http://www.boost.org/libs/utility/utility.htm#result_of" target="_top"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span></code></a><code class="computeroutput"><span class="special"><</span> <span class="identifier">F</span><span class="special">(</span><span class="identifier">T1</span> |
| <span class="special">...</span><span class="identifier">TN</span><span class="special">)</span> <span class="special">>::</span><span class="identifier">type</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| Result of a call with <code class="computeroutput"><span class="identifier">A1</span> |
| <span class="special">...</span><span class="identifier">AN</span></code>-typed |
| arguments |
| </p> |
| </td> |
| </tr></tbody> |
| </table></div> |
| <a name="fusion.functional.concepts.def_callable.models"></a><h6> |
| <a name="id1075065"></a> |
| <a class="link" href="def_callable.html#fusion.functional.concepts.def_callable.models">Models</a> |
| </h6> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"> |
| <a class="link" href="poly.html" title="Polymorphic Function Object">Polymorphic Function |
| Object</a> types |
| </li> |
| <li class="listitem"> |
| member (function or data) pointer types |
| </li> |
| </ul></div> |
| <a name="fusion.functional.concepts.def_callable.examples"></a><h6> |
| <a name="id1075101"></a> |
| <a class="link" href="def_callable.html#fusion.functional.concepts.def_callable.examples">Examples</a> |
| </h6> |
| <pre class="programlisting"><span class="special">&</span> <span class="identifier">a_free_function</span> |
| <span class="special">&</span> <span class="identifier">a_class</span><span class="special">::</span><span class="identifier">a_static_member_function</span> |
| <span class="special">&</span> <span class="identifier">a_class</span><span class="special">::</span><span class="identifier">a_nonstatic_data_member</span> |
| <span class="special">&</span> <span class="identifier">a_class</span><span class="special">::</span><span class="identifier">a_nonstatic_member_function</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">less</span><span class="special"><</span><span class="keyword">int</span><span class="special">>()</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"><</span><span class="keyword">int</span><span class="special">>(),</span> <span class="identifier">_1</span><span class="special">,</span> <span class="number">5</span><span class="special">)</span> |
| <span class="comment">// Note: Boost.Lambda expressions don't work with __boost_result_of__ |
| </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"><</span><span class="keyword">int</span><span class="special">>())</span> |
| </pre> |
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| <td align="right"><div class="copyright-footer">Copyright © 2001-2007 Joel de Guzman, Dan Marsden, Tobias |
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| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
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