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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"> | |
3 | <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> | |
4 | <head> | |
5 | <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> | |
6 | <meta name="generator" content="Docutils 0.7: http://docutils.sourceforge.net/" /> | |
7 | <title>The MPL Reference Manual: plus</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="./arithmetic-operations.html" class="navigation-link">Prev</a> <a href="./minus.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group">Back <a href="./minus.html" class="navigation-link">Along</a></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="./plus.html" class="navigation-link">plus</a></td> | |
13 | </tr></table><div class="header-separator"></div> | |
14 | <div class="section" id="plus"> | |
15 | <h1><a class="toc-backref" href="./arithmetic-operations.html#id1536">plus</a></h1> | |
16 | <div class="section" id="id960"> | |
17 | <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3> | |
18 | <pre class="literal-block"> | |
19 | template< | |
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 | > | |
26 | struct <a href="./plus.html" class="identifier">plus</a> | |
27 | { | |
28 | typedef <em>unspecified</em> type; | |
29 | }; | |
30 | </pre> | |
31 | </div> | |
32 | <div class="section" id="id961"> | |
33 | <h3><a class="subsection-title" href="#description" name="description">Description</a></h3> | |
34 | <p>Returns the sum of its arguments.</p> | |
35 | </div> | |
36 | <div class="section" id="id962"> | |
37 | <h3><a class="subsection-title" href="#header" name="header">Header</a></h3> | |
38 | <pre class="literal-block"> | |
39 | #include <<a href="../../../../boost/mpl/plus.hpp" class="header">boost/mpl/plus.hpp</a>> | |
40 | #include <<a href="../../../../boost/mpl/arithmetic.hpp" class="header">boost/mpl/arithmetic.hpp</a>> | |
41 | </pre> | |
42 | </div> | |
43 | <div class="section" id="id963"> | |
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="id964"> | |
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="id965"> | |
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="./plus.html" class="identifier">plus</a><c1,<em>...</em>c<em>n</em>>::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>< | |
89 | typeof(c1::value + c2::value) | |
90 | , ( c1::value + c2::value ) | |
91 | > c; | |
92 | ||
93 | typedef <a href="./plus.html" class="identifier">plus</a><c,c3,<em>...</em>c<em>n</em>>::type r; | |
94 | </pre> | |
95 | </td> | |
96 | </tr> | |
97 | </tbody> | |
98 | </table> | |
99 | <!-- .......................................................................... --> | |
100 | <pre class="literal-block"> | |
101 | typedef <a href="./plus.html" class="identifier">plus</a><c1,<em>...</em>c<em>n</em>> 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="./plus.html" class="identifier">plus</a><c1,<em>...</em>c<em>n</em>>::type {}; | |
113 | </pre> | |
114 | </td> | |
115 | </tr> | |
116 | </tbody> | |
117 | </table> | |
118 | </div> | |
119 | <div class="section" id="id966"> | |
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="id967"> | |
124 | <h3><a class="subsection-title" href="#example" name="example">Example</a></h3> | |
125 | <pre class="literal-block"> | |
126 | typedef <a href="./plus.html" class="identifier">plus</a>< <a href="./int.html" class="identifier">int_</a><-10>, <a href="./int.html" class="identifier">int_</a><3>, <a href="./long.html" class="identifier">long_</a><1> >::type r; | |
127 | <a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( r::value, ==, -6 ); | |
128 | <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< r::<a href="./value-type.html" class="identifier">value_type</a>, long > )); | |
129 | </pre> | |
130 | </div> | |
131 | <div class="section" id="id968"> | |
132 | <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3> | |
133 | <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="./minus.html">minus</a>, <a class="reference internal" href="./negate.html">negate</a>, <a class="reference internal" href="./times.html">times</a></p> | |
134 | <!-- Metafunctions/Arithmetic Operations//minus |20 --> | |
135 | </div> | |
136 | </div> | |
137 | ||
138 | <div class="footer-separator"></div> | |
139 | <table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./arithmetic-operations.html" class="navigation-link">Prev</a> <a href="./minus.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group">Back <a href="./minus.html" class="navigation-link">Along</a></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> | |
140 | <td><div class="copyright-footer"><div class="copyright">Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</div> | |
141 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
142 | 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> | |
143 | </html> |