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- <div class="section" id="quote">
- <h1><a class="toc-backref" href="./composition-and-argument-binding.html#id1532">quote</a></h1>
- <div class="section" id="id938">
- <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
- <pre class="literal-block">
- template<
- template< typename P1 > class F
- , typename Tag = <em>unspecified</em>
- >
- struct quote1
- {
- // <em>unspecified</em>
- // <em>...</em>
- };
- <em>...</em>
- template<
- template< typename P1,<em>...</em> typename P<em>n</em> > class F
- , typename Tag = <em>unspecified</em>
- >
- struct <a href="./quote.html" class="identifier">quote</a><em>n</em>
- {
- // <em>unspecified</em>
- // <em>...</em>
- };
- </pre>
- </div>
- <div class="section" id="id939">
- <h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
- <p><tt class="literal"><span class="pre"><a href="./quote.html" class="identifier">quote</a></span></tt><em>n</em> is a higher-order primitive that wraps an <em>n</em>-ary <a class="reference internal" href="./metafunction.html">Metafunction</a> to create
- a corresponding <a class="reference internal" href="./metafunction-class.html">Metafunction Class</a>.</p>
- </div>
- <div class="section" id="id940">
- <h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
- <pre class="literal-block">
- #include <<a href="../../../../boost/mpl/quote.hpp" class="header">boost/mpl/quote.hpp</a>>
- </pre>
- </div>
- <div class="section" id="id941">
- <h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
- <p><a class="reference internal" href="./metafunction-class.html">Metafunction Class</a></p>
- </div>
- <div class="section" id="id942">
- <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
- <table border="1" class="docutils table">
- <colgroup>
- <col width="18%" />
- <col width="27%" />
- <col width="55%" />
- </colgroup>
- <thead valign="bottom">
- <tr><th class="head">Parameter</th>
- <th class="head">Requirement</th>
- <th class="head">Description</th>
- </tr>
- </thead>
- <tbody valign="top">
- <tr><td><tt class="literal"><span class="pre">F</span></tt></td>
- <td><a class="reference internal" href="./metafunction.html">Metafunction</a></td>
- <td>A metafunction to wrap.</td>
- </tr>
- <tr><td><tt class="literal"><span class="pre">Tag</span></tt></td>
- <td>Any type</td>
- <td>A tag determining wrap semantics.</td>
- </tr>
- </tbody>
- </table>
- </div>
- <div class="section" id="id943">
- <h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
- <p>For any <em>n</em>-ary <a class="reference internal" href="./metafunction.html">Metafunction</a> <tt class="literal"><span class="pre">f</span></tt> and arbitrary type <tt class="literal"><span class="pre">tag</span></tt>:</p>
- <pre class="literal-block">
- typedef <a href="./quote.html" class="identifier">quote</a><em>n</em><f> g;
- typedef <a href="./quote.html" class="identifier">quote</a><em>n</em><f,tag> g;
- </pre>
- <table class="docutils field-list" frame="void" rules="none">
- <col class="field-name" />
- <col class="field-body" />
- <tbody valign="top">
- <tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first"><a class="reference internal" href="./metafunction-class.html">Metafunction Class</a></p>
- </td>
- </tr>
- <tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
- <pre class="literal-block">
- struct g
- {
- template< typename A1,<em>...</em> typename A<em>n</em> > struct <a href="./apply.html" class="identifier">apply</a>
- : f<A1,<em>...</em>A<em>n</em>>
- {
- };
- };
- </pre>
- <p>if <tt class="literal"><span class="pre">f<A1,...An></span></tt> has a nested type member <tt class="literal"><span class="pre">::type</span></tt>, and to</p>
- <pre class="literal-block">
- struct g
- {
- template< typename A1,<em>...</em> typename A<em>n</em> > struct <a href="./apply.html" class="identifier">apply</a>
- {
- typedef f<A1,<em>...</em>A<em>n</em>> type;
- };
- };
- </pre>
- <p class="last">otherwise.</p>
- </td>
- </tr>
- </tbody>
- </table>
- </div>
- <div class="section" id="id944">
- <h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
- <pre class="literal-block">
- template< typename T > struct f1
- {
- typedef T type;
- };
- template<
- typename T1, typename T2, typename T3, typename T4, typename T5
- >
- struct f5
- {
- // no 'type' member!
- };
- typedef <a href="./quote.html" class="identifier">quote</a><tt class="literal"><span class="pre">1</span></tt><f1>::<a href="./apply.html" class="identifier">apply</a><int>::type t1;
- typedef <a href="./quote.html" class="identifier">quote</a><tt class="literal"><span class="pre">5</span></tt><f5>::<a href="./apply.html" class="identifier">apply</a><char,short,int,long,float>::type t5;
- <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< t1, int > ));
- <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< t5, f5<char,short,int,long,float> > ));
- </pre>
- </div>
- <div class="section" id="id945">
- <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
- <p><a class="reference internal" href="./composition-and-argument-binding.html">Composition and Argument Binding</a>, <a class="reference internal" href="./invocation.html">invocation</a>, <a class="reference internal" href="./bind.html">bind</a>, <a class="reference internal" href="./lambda.html">lambda</a>, <a class="reference internal" href="./protect.html">protect</a>, <a class="reference internal" href="./apply.html">apply</a></p>
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