159 lines
8.7 KiB
HTML
159 lines
8.7 KiB
HTML
<?xml version="1.0" encoding="utf-8" ?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="generator" content="Docutils 0.7: http://docutils.sourceforge.net/" />
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<title>The MPL Reference Manual: quote</title>
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<link rel="stylesheet" href="../style.css" type="text/css" />
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</head>
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<body class="docframe refmanual">
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<table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./bind.html" class="navigation-link">Prev</a> <a href="./arg.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./bind.html" class="navigation-link">Back</a> <a href="./arg.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./composition-and-argument-binding.html" class="navigation-link">Up</a> <a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td>
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<td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./metafunctions.html" class="navigation-link">Metafunctions</a> / <a href="./composition-and-argument-binding.html" class="navigation-link">Composition and Argument Binding</a> / <a href="./quote.html" class="navigation-link">quote</a></td>
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</tr></table><div class="header-separator"></div>
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<div class="section" id="quote">
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<h1><a class="toc-backref" href="./composition-and-argument-binding.html#id1532">quote</a></h1>
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<div class="section" id="id938">
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<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
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<pre class="literal-block">
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template<
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template< typename P1 > class F
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, typename Tag = <em>unspecified</em>
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>
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struct quote1
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{
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// <em>unspecified</em>
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// <em>...</em>
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};
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<em>...</em>
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template<
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template< typename P1,<em>...</em> typename P<em>n</em> > class F
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, typename Tag = <em>unspecified</em>
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>
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struct <a href="./quote.html" class="identifier">quote</a><em>n</em>
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{
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// <em>unspecified</em>
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// <em>...</em>
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};
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</pre>
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</div>
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<div class="section" id="id939">
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<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
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<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
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a corresponding <a class="reference internal" href="./metafunction-class.html">Metafunction Class</a>.</p>
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</div>
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<div class="section" id="id940">
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<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
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<pre class="literal-block">
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#include <<a href="../../../../boost/mpl/quote.hpp" class="header">boost/mpl/quote.hpp</a>>
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</pre>
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</div>
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<div class="section" id="id941">
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<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
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<p><a class="reference internal" href="./metafunction-class.html">Metafunction Class</a></p>
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</div>
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<div class="section" id="id942">
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<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
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<table border="1" class="docutils table">
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<colgroup>
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<col width="18%" />
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<col width="27%" />
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<col width="55%" />
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</colgroup>
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<thead valign="bottom">
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<tr><th class="head">Parameter</th>
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<th class="head">Requirement</th>
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<th class="head">Description</th>
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</tr>
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</thead>
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<tbody valign="top">
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<tr><td><tt class="literal"><span class="pre">F</span></tt></td>
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<td><a class="reference internal" href="./metafunction.html">Metafunction</a></td>
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<td>A metafunction to wrap.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre">Tag</span></tt></td>
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<td>Any type</td>
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<td>A tag determining wrap semantics.</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="section" id="id943">
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<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
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<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>
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<pre class="literal-block">
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typedef <a href="./quote.html" class="identifier">quote</a><em>n</em><f> g;
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typedef <a href="./quote.html" class="identifier">quote</a><em>n</em><f,tag> g;
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</pre>
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<table class="docutils field-list" frame="void" rules="none">
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<col class="field-name" />
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<col class="field-body" />
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<tbody valign="top">
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<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>
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</td>
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</tr>
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<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
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<pre class="literal-block">
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struct g
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{
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template< typename A1,<em>...</em> typename A<em>n</em> > struct <a href="./apply.html" class="identifier">apply</a>
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: f<A1,<em>...</em>A<em>n</em>>
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{
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};
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};
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</pre>
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<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>
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<pre class="literal-block">
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struct g
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{
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template< typename A1,<em>...</em> typename A<em>n</em> > struct <a href="./apply.html" class="identifier">apply</a>
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{
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typedef f<A1,<em>...</em>A<em>n</em>> type;
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};
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};
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</pre>
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<p class="last">otherwise.</p>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="section" id="id944">
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<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
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<pre class="literal-block">
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template< typename T > struct f1
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{
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typedef T type;
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};
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template<
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typename T1, typename T2, typename T3, typename T4, typename T5
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>
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struct f5
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{
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// no 'type' member!
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};
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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;
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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;
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<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< t1, int > ));
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<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< t5, f5<char,short,int,long,float> > ));
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</pre>
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</div>
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<div class="section" id="id945">
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<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
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<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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<!-- Metafunctions/Composition and Argument Binding//arg |50 -->
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</div>
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</div>
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<div class="footer-separator"></div>
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<table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./bind.html" class="navigation-link">Prev</a> <a href="./arg.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./bind.html" class="navigation-link">Back</a> <a href="./arg.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./composition-and-argument-binding.html" class="navigation-link">Up</a> <a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td>
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<td><div class="copyright-footer"><div class="copyright">Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</div>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at <a class="reference external" href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)</div></td></tr></table></body>
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