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- <div class="titlepage"><div><div><h2 class="title" style="clear: both">
- <a name="boost_functiontypes.introduction"></a><a class="link" href="introduction.html" title="Introduction">Introduction</a>
- </h2></div></div></div>
- <p>
- Boost.FunctionTypes provides functionality to classify, decompose and synthesize
- function, function pointer, function reference and pointer to member types.
- </p>
- <p>
- We collectively refer to these types as <span class="emphasis"><em>callable builtin</em></span>
- types.
- </p>
- <p>
- In particular, the library can be used to:
- </p>
- <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
- <li class="listitem">
- test whether a type is a specific callable, builtin type,
- </li>
- <li class="listitem">
- extract all component properties from callable, builtin types, and
- </li>
- <li class="listitem">
- create callable, builtin types from specified properties.
- </li>
- </ul></div>
- <p>
- The library is designed to work well with other Boost libraries and uses well-accepted
- concepts introduced by Boost and TR1.
- </p>
- <p>
- Templates that encapsulate boolean or numeric properties define a static member
- constant called <code class="literal">value</code>.
- </p>
- <pre class="programlisting"><a class="link" href="reference/classification.html#boost_functiontypes.reference.classification.is_function_pointer" title="is_function_pointer">is_function_pointer</a><span class="special"><</span> <span class="keyword">bool</span><span class="special">(*)(</span><span class="keyword">int</span><span class="special">)</span> <span class="special">>::</span><span class="identifier">value</span> <span class="comment">// == true </span>
- <a class="link" href="reference/decomposition.html#boost_functiontypes.reference.decomposition.function_arity" title="function_arity">function_arity</a><span class="special"><</span> <span class="keyword">bool</span><span class="special">(*)(</span><span class="keyword">int</span><span class="special">)</span> <span class="special">>::</span><span class="identifier">value</span> <span class="comment">// == 1</span>
- </pre>
- <p>
- Templates that encapsulate properties that are single types contain a type
- member called <code class="literal">type</code>.
- </p>
- <pre class="programlisting"><a class="link" href="reference/synthesis.html#boost_functiontypes.reference.synthesis.function_type" title="function_type">function_type</a><span class="special"><</span> <span class="identifier">mpl</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">bool</span><span class="special">,</span><span class="keyword">int</span><span class="special">></span> <span class="special">>::</span><span class="identifier">type</span> <span class="comment">// is bool(int)</span>
- <a class="link" href="reference/decomposition.html#boost_functiontypes.reference.decomposition.result_type" title="result_type">result_type</a><span class="special"><</span> <span class="keyword">bool</span><span class="special">(&)(</span><span class="keyword">int</span><span class="special">)</span> <span class="special">>::</span><span class="identifier">type</span> <span class="comment">// is bool</span>
- </pre>
- <p>
- Templates that encapsulate properties that are type lists model an MPL-compatible
- type sequence.
- </p>
- <pre class="programlisting"><a class="link" href="reference/decomposition.html#boost_functiontypes.reference.decomposition.parameter_types" title="parameter_types">parameter_types</a><span class="special"><</span> <span class="keyword">bool</span><span class="special">(</span><span class="keyword">int</span><span class="special">)</span> <span class="special">></span> <span class="comment">// models an MPL sequence</span>
- </pre>
- </div>
- <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
- <td align="left"></td>
- <td align="right"><div class="copyright-footer">Copyright © 2004-2007 Tobias
- Schwinger<p>
- 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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