ceph/src/boost/libs/mpl/doc/refmanual/times.html

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   7 <title>The MPL Reference Manual: times</title>
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  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="./times.html" class="navigation-link">times</a></td>
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  14 <div class="section" id="times">
  15 <h1><a class="toc-backref" href="./arithmetic-operations.html#id1538">times</a></h1>
  16 <div class="section" id="id978">
  17 <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
  18 <pre class="literal-block">
  19 template&lt;
  20       typename T1
  21     , typename T2
  22     , typename T3 = <em>unspecified</em>
  23     <em>...</em>
  24     , typename T<em>n</em> = <em>unspecified</em>
  25     &gt;
  26 struct <a href="./times.html" class="identifier">times</a>
  27 {
  28     typedef <em>unspecified</em> type;
  29 };
  30 </pre>
  31 </div>
  32 <div class="section" id="id979">
  33 <h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
  34 <p>Returns the product of its arguments.</p>
  35 </div>
  36 <div class="section" id="id980">
  37 <h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
  38 <pre class="literal-block">
  39 #include &lt;<a href="../../../../boost/mpl/times.hpp" class="header">boost/mpl/times.hpp</a>&gt;
  40 #include &lt;<a href="../../../../boost/mpl/arithmetic.hpp" class="header">boost/mpl/arithmetic.hpp</a>&gt;
  41 </pre>
  42 </div>
  43 <div class="section" id="id981">
  44 <h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
  45 <p><a class="reference internal" href="./numeric-metafunction.html">Numeric Metafunction</a></p>
  46 </div>
  47 <div class="section" id="id982">
  48 <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
  49 <table border="1" class="docutils table">
  50 <colgroup>
  51 <col width="17%" />
  52 <col width="30%" />
  53 <col width="53%" />
  54 </colgroup>
  55 <thead valign="bottom">
  56 <tr><th class="head">Parameter</th>
  57 <th class="head">Requirement</th>
  58 <th class="head">Description</th>
  59 </tr>
  60 </thead>
  61 <tbody valign="top">
  62 <tr><td><tt class="literal"><span class="pre">T1</span></tt>, <tt class="literal"><span class="pre">T2</span></tt>,... <tt class="literal"><span class="pre">Tn</span></tt></td>
  63 <td><a class="reference internal" href="./integral-constant.html">Integral Constant</a></td>
  64 <td>Operation's arguments.</td>
  65 </tr>
  66 </tbody>
  67 </table>
  68 <p>[<em>Note:</em> The requirements listed in this specification
  69 are the ones imposed by the default implementation. See <a class="reference internal" href="./numeric-metafunction.html">Numeric Metafunction</a> concept
  70 for the details on how to provide an implementation for a user-defined numeric type
  71 that does not satisfy the <a class="reference internal" href="./integral-constant.html">Integral Constant</a> requirements. — <em>end note</em>]</p>
  72 </div>
  73 <div class="section" id="id983">
  74 <h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
  75 <p>For any <a class="reference internal" href="./integral-constant.html">Integral Constant</a>s <em>c</em><sub>1</sub>,<em>c</em><sub>2</sub>,... <em>c</em><sub>n</sub>:</p>
  76 <pre class="literal-block">
  77 typedef <a href="./times.html" class="identifier">times</a>&lt;c1,<em>...</em>c<em>n</em>&gt;::type r;
  78 </pre>
  79 <table class="docutils field-list" frame="void" rules="none">
  80 <col class="field-name" />
  81 <col class="field-body" />
  82 <tbody valign="top">
  83 <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>
  84 </td>
  85 </tr>
  86 <tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
  87 <pre class="last literal-block">
  88 typedef <a href="./integral-c.html" class="identifier">integral_c</a>&lt;
  89       typeof(c1::value * c2::value)
  90     , ( c1::value * c2::value )
  91     &gt; c;
  92
  93 typedef <a href="./times.html" class="identifier">times</a>&lt;c,c3,<em>...</em>c<em>n</em>&gt;::type r;
  94 </pre>
  95 </td>
  96 </tr>
  97 </tbody>
  98 </table>
  99 <!-- .......................................................................... -->
 100 <pre class="literal-block">
 101 typedef <a href="./times.html" class="identifier">times</a>&lt;c1,<em>...</em>c<em>n</em>&gt; r;
 102 </pre>
 103 <table class="docutils field-list" frame="void" rules="none">
 104 <col class="field-name" />
 105 <col class="field-body" />
 106 <tbody valign="top">
 107 <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>
 108 </td>
 109 </tr>
 110 <tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
 111 <pre class="last literal-block">
 112 struct r : <a href="./times.html" class="identifier">times</a>&lt;c1,<em>...</em>c<em>n</em>&gt;::type {};
 113 </pre>
 114 </td>
 115 </tr>
 116 </tbody>
 117 </table>
 118 </div>
 119 <div class="section" id="id984">
 120 <h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3>
 121 <p>Amortized constant time.</p>
 122 </div>
 123 <div class="section" id="id985">
 124 <h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
 125 <pre class="literal-block">
 126 typedef <a href="./times.html" class="identifier">times</a>&lt; <a href="./int.html" class="identifier">int_</a>&lt;-10&gt;, <a href="./int.html" class="identifier">int_</a>&lt;3&gt;, <a href="./long.html" class="identifier">long_</a>&lt;1&gt; &gt;::type r;
 127 <a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( r::value, ==, -30 );
 128 <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same&lt; r::<a href="./value-type.html" class="identifier">value_type</a>, long > ));
 129 </pre>
 130 </div>
 131 <div class="section" id="id986">
 132 <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
 133 <p><a class="reference internal" href="./metafunctions.html">Metafunctions</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="./divides.html">divides</a>, <a class="reference internal" href="./modulus.html">modulus</a>, <a class="reference internal" href="./plus.html">plus</a></p>
 134 <!-- Metafunctions/Arithmetic Operations//divides |40 -->
 135 </div>
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