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| 6 | <meta name="generator" content="Docutils 0.7: http://docutils.sourceforge.net/" /> | |
| 7 | <title>The MPL Reference Manual: negate</title> | |
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| 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="./modulus.html" class="navigation-link">Prev</a> <a href="./comparisons.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./modulus.html" class="navigation-link">Back</a> Along</span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./arithmetic-operations.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="./arithmetic-operations.html" class="navigation-link">Arithmetic Operations</a> / <a href="./negate.html" class="navigation-link">negate</a></td> | |
| 13 | </tr></table><div class="header-separator"></div> | |
| 14 | <div class="section" id="negate"> | |
| 15 | <h1><a class="toc-backref" href="./arithmetic-operations.html#id1541">negate</a></h1> | |
| 16 | <div class="section" id="id1005"> | |
| 17 | <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3> | |
| 18 | <pre class="literal-block"> | |
| 19 | template< | |
| 20 | typename T | |
| 21 | > | |
| 22 | struct <a href="./negate.html" class="identifier">negate</a> | |
| 23 | { | |
| 24 | typedef <em>unspecified</em> type; | |
| 25 | }; | |
| 26 | </pre> | |
| 27 | </div> | |
| 28 | <div class="section" id="id1006"> | |
| 29 | <h3><a class="subsection-title" href="#description" name="description">Description</a></h3> | |
| 30 | <p>Returns the negative (additive inverse) of its argument.</p> | |
| 31 | </div> | |
| 32 | <div class="section" id="id1007"> | |
| 33 | <h3><a class="subsection-title" href="#header" name="header">Header</a></h3> | |
| 34 | <pre class="literal-block"> | |
| 35 | #include <<a href="../../../../boost/mpl/negate.hpp" class="header">boost/mpl/negate.hpp</a>> | |
| 36 | #include <<a href="../../../../boost/mpl/arithmetic.hpp" class="header">boost/mpl/arithmetic.hpp</a>> | |
| 37 | </pre> | |
| 38 | </div> | |
| 39 | <div class="section" id="id1008"> | |
| 40 | <h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3> | |
| 41 | <p><a class="reference internal" href="./numeric-metafunction.html">Numeric Metafunction</a></p> | |
| 42 | </div> | |
| 43 | <div class="section" id="id1009"> | |
| 44 | <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3> | |
| 45 | <table border="1" class="docutils table"> | |
| 46 | <colgroup> | |
| 47 | <col width="17%" /> | |
| 48 | <col width="30%" /> | |
| 49 | <col width="53%" /> | |
| 50 | </colgroup> | |
| 51 | <thead valign="bottom"> | |
| 52 | <tr><th class="head">Parameter</th> | |
| 53 | <th class="head">Requirement</th> | |
| 54 | <th class="head">Description</th> | |
| 55 | </tr> | |
| 56 | </thead> | |
| 57 | <tbody valign="top"> | |
| 58 | <tr><td><tt class="literal"><span class="pre">T</span></tt></td> | |
| 59 | <td><a class="reference internal" href="./integral-constant.html">Integral Constant</a></td> | |
| 60 | <td>Operation's argument.</td> | |
| 61 | </tr> | |
| 62 | </tbody> | |
| 63 | </table> | |
| 64 | <p>[<em>Note:</em> The requirements listed in this specification | |
| 65 | are the ones imposed by the default implementation. See <a class="reference internal" href="./numeric-metafunction.html">Numeric Metafunction</a> concept | |
| 66 | for the details on how to provide an implementation for a user-defined numeric type | |
| 67 | that does not satisfy the <a class="reference internal" href="./integral-constant.html">Integral Constant</a> requirements. — <em>end note</em>]</p> | |
| 68 | </div> | |
| 69 | <div class="section" id="id1010"> | |
| 70 | <h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3> | |
| 71 | <p>For any <a class="reference internal" href="./integral-constant.html">Integral Constant</a> <tt class="literal"><span class="pre">c</span></tt>:</p> | |
| 72 | <pre class="literal-block"> | |
| 73 | typedef <a href="./negate.html" class="identifier">negate</a><c>::type r; | |
| 74 | </pre> | |
| 75 | <table class="docutils field-list" frame="void" rules="none"> | |
| 76 | <col class="field-name" /> | |
| 77 | <col class="field-body" /> | |
| 78 | <tbody valign="top"> | |
| 79 | <tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first"><a class="reference internal" href="./integral-constant.html">Integral Constant</a>.</p> | |
| 80 | </td> | |
| 81 | </tr> | |
| 82 | <tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p> | |
| 83 | <pre class="last literal-block"> | |
| 84 | typedef <a href="./integral-c.html" class="identifier">integral_c</a>< c::<a href="./value-type.html" class="identifier">value_type</a>, ( -c::value ) > r; | |
| 85 | </pre> | |
| 86 | </td> | |
| 87 | </tr> | |
| 88 | </tbody> | |
| 89 | </table> | |
| 90 | <!-- .......................................................................... --> | |
| 91 | <pre class="literal-block"> | |
| 92 | typedef <a href="./negate.html" class="identifier">negate</a><c> r; | |
| 93 | </pre> | |
| 94 | <table class="docutils field-list" frame="void" rules="none"> | |
| 95 | <col class="field-name" /> | |
| 96 | <col class="field-body" /> | |
| 97 | <tbody valign="top"> | |
| 98 | <tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first"><a class="reference internal" href="./integral-constant.html">Integral Constant</a>.</p> | |
| 99 | </td> | |
| 100 | </tr> | |
| 101 | <tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p> | |
| 102 | <pre class="last literal-block"> | |
| 103 | struct r : <a href="./negate.html" class="identifier">negate</a><c>::type {}; | |
| 104 | </pre> | |
| 105 | </td> | |
| 106 | </tr> | |
| 107 | </tbody> | |
| 108 | </table> | |
| 109 | </div> | |
| 110 | <div class="section" id="id1011"> | |
| 111 | <h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3> | |
| 112 | <p>Amortized constant time.</p> | |
| 113 | </div> | |
| 114 | <div class="section" id="id1012"> | |
| 115 | <h3><a class="subsection-title" href="#example" name="example">Example</a></h3> | |
| 116 | <pre class="literal-block"> | |
| 117 | typedef <a href="./negate.html" class="identifier">negate</a>< <a href="./int.html" class="identifier">int_</a><-10> >::type r; | |
| 118 | <a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( r::value, ==, 10 ); | |
| 119 | <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< r::<a href="./value-type.html" class="identifier">value_type</a>, int > )); | |
| 120 | </pre> | |
| 121 | </div> | |
| 122 | <div class="section" id="id1013"> | |
| 123 | <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3> | |
| 124 | <p><a class="reference internal" href="./arithmetic-operations.html">Arithmetic Operations</a>, <a class="reference internal" href="./numeric-metafunction.html">Numeric Metafunction</a>, <a class="reference internal" href="./numeric-cast.html">numeric_cast</a>, <a class="reference internal" href="./plus.html">plus</a>, <a class="reference internal" href="./minus.html">minus</a>, <a class="reference internal" href="./times.html">times</a></p> | |
| 125 | </div> | |
| 126 | </div> | |
| 127 | ||
| 128 | <div class="footer-separator"></div> | |
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| 130 | <td><div class="copyright-footer"><div class="copyright">Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</div> | |
| 131 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
| 132 | 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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