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1 | <?xml version="1.0" encoding="utf-8" ?> |
| 2 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> | |
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| 6 | <meta name="generator" content="Docutils 0.7: http://docutils.sourceforge.net/" /> | |
| 7 | <title>The MPL Reference Manual: bind</title> | |
| 8 | <link rel="stylesheet" href="../style.css" type="text/css" /> | |
| 9 | </head> | |
| 10 | <body class="docframe refmanual"> | |
| 11 | <table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./lambda.html" class="navigation-link">Prev</a> <a href="./quote.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./lambda.html" class="navigation-link">Back</a> <a href="./quote.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> | |
| 12 | <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="./bind.html" class="navigation-link">bind</a></td> | |
| 13 | </tr></table><div class="header-separator"></div> | |
| 14 | <div class="section" id="bind"> | |
| 15 | <h1><a class="toc-backref" href="./composition-and-argument-binding.html#id1531">bind</a></h1> | |
| 16 | <div class="section" id="id929"> | |
| 17 | <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3> | |
| 18 | <pre class="literal-block"> | |
| 19 | template< | |
| 20 | typename F | |
| 21 | > | |
| 22 | struct bind0 | |
| 23 | { | |
| 24 | // <em>unspecified</em> | |
| 25 | // <em>...</em> | |
| 26 | }; | |
| 27 | ||
| 28 | template< | |
| 29 | typename F, typename A1 | |
| 30 | > | |
| 31 | struct bind1 | |
| 32 | { | |
| 33 | // <em>unspecified</em> | |
| 34 | // <em>...</em> | |
| 35 | }; | |
| 36 | ||
| 37 | <em>...</em> | |
| 38 | ||
| 39 | template< | |
| 40 | typename F, typename A1,<em>...</em> typename An | |
| 41 | > | |
| 42 | struct <a href="./bind.html" class="identifier">bind</a><em>n</em> | |
| 43 | { | |
| 44 | // <em>unspecified</em> | |
| 45 | // <em>...</em> | |
| 46 | }; | |
| 47 | ||
| 48 | template< | |
| 49 | typename F | |
| 50 | , typename A1 = <em>unspecified</em> | |
| 51 | <em>...</em> | |
| 52 | , typename An = <em>unspecified</em> | |
| 53 | > | |
| 54 | struct <a href="./bind.html" class="identifier">bind</a> | |
| 55 | { | |
| 56 | // <em>unspecified</em> | |
| 57 | // <em>...</em> | |
| 58 | }; | |
| 59 | </pre> | |
| 60 | </div> | |
| 61 | <div class="section" id="id930"> | |
| 62 | <h3><a class="subsection-title" href="#description" name="description">Description</a></h3> | |
| 63 | <p><tt class="literal"><span class="pre"><a href="./bind.html" class="identifier">bind</a></span></tt> is a higher-order primitive for <a class="reference internal" href="./metafunction-class.html">Metafunction Class</a> composition | |
| 64 | and argument binding. In essence, it's a compile-time counterpart of | |
| 65 | the similar run-time functionality provided by <a class="reference external" href="http://www.boost.org/libs/bind/bind.html" target="_top">Boost.Bind</a> and <a class="reference external" href="http://www.boost.org/libs/lambda/doc/index.html" target="_top">Boost.Lambda</a> | |
| 66 | libraries.</p> | |
| 67 | </div> | |
| 68 | <div class="section" id="id931"> | |
| 69 | <h3><a class="subsection-title" href="#header" name="header">Header</a></h3> | |
| 70 | <pre class="literal-block"> | |
| 71 | #include <<a href="../../../../boost/mpl/bind.hpp" class="header">boost/mpl/bind.hpp</a>> | |
| 72 | </pre> | |
| 73 | </div> | |
| 74 | <div class="section" id="id932"> | |
| 75 | <h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3> | |
| 76 | <p><a class="reference internal" href="./metafunction-class.html">Metafunction Class</a></p> | |
| 77 | </div> | |
| 78 | <div class="section" id="id933"> | |
| 79 | <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3> | |
| 80 | <table border="1" class="docutils table"> | |
| 81 | <colgroup> | |
| 82 | <col width="15%" /> | |
| 83 | <col width="36%" /> | |
| 84 | <col width="48%" /> | |
| 85 | </colgroup> | |
| 86 | <thead valign="bottom"> | |
| 87 | <tr><th class="head">Parameter</th> | |
| 88 | <th class="head">Requirement</th> | |
| 89 | <th class="head">Description</th> | |
| 90 | </tr> | |
| 91 | </thead> | |
| 92 | <tbody valign="top"> | |
| 93 | <tr><td><tt class="literal"><span class="pre">F</span></tt></td> | |
| 94 | <td><a class="reference internal" href="./metafunction-class.html">Metafunction Class</a></td> | |
| 95 | <td>An metafunction class to perform binding on.</td> | |
| 96 | </tr> | |
| 97 | <tr><td><tt class="literal"><span class="pre">A1</span></tt>,... <tt class="literal"><span class="pre">An</span></tt></td> | |
| 98 | <td>Any type</td> | |
| 99 | <td>Arguments to bind.</td> | |
| 100 | </tr> | |
| 101 | </tbody> | |
| 102 | </table> | |
| 103 | </div> | |
| 104 | <div class="section" id="id934"> | |
| 105 | <h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3> | |
| 106 | <p>For any <a class="reference internal" href="./metafunction-class.html">Metafunction Class</a> <tt class="literal"><span class="pre">f</span></tt> and arbitrary types <tt class="literal"><span class="pre">a1</span></tt>,... <tt class="literal"><span class="pre">an</span></tt>:</p> | |
| 107 | <pre class="literal-block"> | |
| 108 | typedef <a href="./bind.html" class="identifier">bind</a><f,a1,...a<em>n</em>> g; | |
| 109 | typedef <a href="./bind.html" class="identifier">bind</a><em>n</em><f,a1,...a<em>n</em>> g; | |
| 110 | </pre> | |
| 111 | <table class="docutils field-list" frame="void" rules="none"> | |
| 112 | <col class="field-name" /> | |
| 113 | <col class="field-body" /> | |
| 114 | <tbody valign="top"> | |
| 115 | <tr class="field"><th class="field-name">Return type:</th><td class="field-body"><a class="reference internal" href="./metafunction-class.html">Metafunction Class</a></td> | |
| 116 | </tr> | |
| 117 | </tbody> | |
| 118 | </table> | |
| 119 | <table class="docutils field-list" frame="void" id="bind-semantics" rules="none"> | |
| 120 | <col class="field-name" /> | |
| 121 | <col class="field-body" /> | |
| 122 | <tbody valign="top"> | |
| 123 | <tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p> | |
| 124 | <pre class="literal-block"> | |
| 125 | struct g | |
| 126 | { | |
| 127 | template< | |
| 128 | typename U1 = <em>unspecified</em> | |
| 129 | <em>...</em> | |
| 130 | , typename U<em>n</em> = <em>unspecified</em> | |
| 131 | > | |
| 132 | struct <a href="./apply.html" class="identifier">apply</a> | |
| 133 | : <a href="./apply-wrap.html" class="identifier">apply_wrap</a><em>n</em>< | |
| 134 | typename h0<f,U1,<em>...</em>U<em>n</em>>::type | |
| 135 | , typename h1<a1,U1,<em>...</em>U<em>n</em>>::type | |
| 136 | <em>...</em> | |
| 137 | , typename h<em>n</em><a<em>n</em>,U1,<em>...</em>U<em>n</em>>::type | |
| 138 | > | |
| 139 | { | |
| 140 | }; | |
| 141 | }; | |
| 142 | </pre> | |
| 143 | <p>where <tt class="literal"><span class="pre">h</span></tt><em>k</em> is equivalent to</p> | |
| 144 | <pre class="literal-block"> | |
| 145 | template< typename X, typename U1,<em>...</em> typename U<em>n</em> > struct h<em>k</em> | |
| 146 | : <a href="./apply-wrap.html" class="identifier">apply_wrap</a><em>n</em><X,U1,<em>...</em>U<em>n</em>> | |
| 147 | { | |
| 148 | }; | |
| 149 | </pre> | |
| 150 | <p>if <tt class="literal"><span class="pre">f</span></tt> or <tt class="literal"><span class="pre">a</span></tt><em>k</em> is a <a class="reference internal" href="./terminology.html#bind-expression">bind expression</a> or a <a class="reference internal" href="./placeholders.html#placeholder">placeholder</a>, and</p> | |
| 151 | <pre class="literal-block"> | |
| 152 | template< typename X, typename U1,<em>...</em> typename U<em>n</em> > struct h<em>k</em> | |
| 153 | { | |
| 154 | typedef X type; | |
| 155 | }; | |
| 156 | </pre> | |
| 157 | <p class="last">otherwise. [<em>Note:</em> Every <tt class="literal"><span class="pre">n</span></tt>th appearance of the <a class="reference internal" href="./placeholders.html">unnamed placeholder</a> | |
| 158 | in the <tt class="literal"><span class="pre"><a href="./bind.html" class="identifier">bind</a><f,a1,...an></span></tt> specialization is replaced with the corresponding | |
| 159 | numbered placeholder <tt class="literal"><span class="pre">_</span></tt><em>n</em> — <em>end note</em>]</p> | |
| 160 | </td> | |
| 161 | </tr> | |
| 162 | </tbody> | |
| 163 | </table> | |
| 164 | </div> | |
| 165 | <div class="section" id="id936"> | |
| 166 | <h3><a class="subsection-title" href="#example" name="example">Example</a></h3> | |
| 167 | <pre class="literal-block"> | |
| 168 | struct f1 | |
| 169 | { | |
| 170 | template< typename T1 > struct <a href="./apply.html" class="identifier">apply</a> | |
| 171 | { | |
| 172 | typedef T1 type; | |
| 173 | }; | |
| 174 | }; | |
| 175 | ||
| 176 | struct f5 | |
| 177 | { | |
| 178 | template< typename T1, typename T2, typename T3, typename T4, typename T5 > | |
| 179 | struct <a href="./apply.html" class="identifier">apply</a> | |
| 180 | { | |
| 181 | typedef T5 type; | |
| 182 | }; | |
| 183 | }; | |
| 184 | ||
| 185 | typedef <a href="./apply-wrap.html" class="identifier">apply_wrap</a><tt class="literal"><span class="pre">1</span></tt>< | |
| 186 | <a href="./bind.html" class="identifier">bind</a><tt class="literal"><span class="pre">1</span></tt><f1,<a href="./placeholders.html" class="identifier">_1</a>> | |
| 187 | , int | |
| 188 | >::type r11; | |
| 189 | ||
| 190 | typedef <a href="./apply-wrap.html" class="identifier">apply_wrap</a><tt class="literal"><span class="pre">5</span></tt>< | |
| 191 | <a href="./bind.html" class="identifier">bind</a><tt class="literal"><span class="pre">1</span></tt><f1,<a href="./placeholders.html" class="identifier">_5</a>> | |
| 192 | , void,void,void,void,int | |
| 193 | >::type r12; | |
| 194 | ||
| 195 | <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same<r11,int> )); | |
| 196 | <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same<r12,int> )); | |
| 197 | ||
| 198 | typedef <a href="./apply-wrap.html" class="identifier">apply_wrap</a><tt class="literal"><span class="pre">5</span></tt>< | |
| 199 | <a href="./bind.html" class="identifier">bind</a><tt class="literal"><span class="pre">5</span></tt><f5,<a href="./placeholders.html" class="identifier">_1</a>,<a href="./placeholders.html" class="identifier">_2</a>,<a href="./placeholders.html" class="identifier">_3</a>,<a href="./placeholders.html" class="identifier">_4</a>,<a href="./placeholders.html" class="identifier">_5</a>> | |
| 200 | , void,void,void,void,int | |
| 201 | >::type r51; | |
| 202 | ||
| 203 | typedef <a href="./apply-wrap.html" class="identifier">apply_wrap</a><tt class="literal"><span class="pre">5</span></tt>< | |
| 204 | <a href="./bind.html" class="identifier">bind</a><tt class="literal"><span class="pre">5</span></tt><f5,<a href="./placeholders.html" class="identifier">_5</a>,<a href="./placeholders.html" class="identifier">_4</a>,<a href="./placeholders.html" class="identifier">_3</a>,<a href="./placeholders.html" class="identifier">_2</a>,<a href="./placeholders.html" class="identifier">_1</a>> | |
| 205 | , int,void,void,void,void | |
| 206 | >::type r52; | |
| 207 | ||
| 208 | <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same<r51,int> )); | |
| 209 | <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same<r52,int> )); | |
| 210 | </pre> | |
| 211 | </div> | |
| 212 | <div class="section" id="id937"> | |
| 213 | <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3> | |
| 214 | <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="./placeholders.html">Placeholders</a>, <a class="reference internal" href="./lambda.html">lambda</a>, <a class="reference internal" href="./quote.html">quote</a>, | |
| 215 | <a class="reference internal" href="./protect.html">protect</a>, <a class="reference internal" href="./apply.html">apply</a>, <a class="reference internal" href="./apply-wrap.html">apply_wrap</a></p> | |
| 216 | <!-- Metafunctions/Composition and Argument Binding//quote |40 --> | |
| 217 | </div> | |
| 218 | </div> | |
| 219 | ||
| 220 | <div class="footer-separator"></div> | |
| 221 | <table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./lambda.html" class="navigation-link">Prev</a> <a href="./quote.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./lambda.html" class="navigation-link">Back</a> <a href="./quote.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> | |
| 222 | <td><div class="copyright-footer"><div class="copyright">Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</div> | |
| 223 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
| 224 | 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> | |
| 225 | </html> |