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- <div class="section" id="pair">
- <h1><a class="toc-backref" href="./data-types-miscellaneous.html#id1583">pair</a></h1>
- <div class="section" id="id1271">
- <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
- <pre class="literal-block">
- template<
- typename T1
- , typename T2
- >
- struct <a href="./pair.html" class="identifier">pair</a>
- {
- typedef <a href="./pair.html" class="identifier">pair</a> type;
- typedef T1 first;
- typedef T2 second;
- };
- </pre>
- </div>
- <div class="section" id="id1272">
- <h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
- <p>A transparent holder for two arbitrary types.</p>
- </div>
- <div class="section" id="id1273">
- <h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
- <pre class="literal-block">
- #include <<a href="../../../../boost/mpl/pair.hpp" class="header">boost/mpl/pair.hpp</a>>
- </pre>
- </div>
- <div class="section" id="id1274">
- <h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
- <p>Count a number of elements in the sequence together with a number of negative
- elements among these.</p>
- <pre class="literal-block">
- typedef <a href="./fold.html" class="identifier">fold</a><
- <a href="./vector-c.html" class="identifier">vector_c</a><int,-1,0,5,-7,-2,4,5,7>
- , <a href="./pair.html" class="identifier">pair</a>< <a href="./int.html" class="identifier">int_</a><0>, <a href="./int.html" class="identifier">int_</a><0> >
- , <a href="./pair.html" class="identifier">pair</a><
- <a href="./next.html" class="identifier">next</a>< first<<a href="./placeholders.html" class="identifier">_1</a>> >
- , <a href="./if.html" class="identifier">if_</a><
- <a href="./less.html" class="identifier">less</a>< <a href="./placeholders.html" class="identifier">_2</a>, <a href="./int.html" class="identifier">int_</a><0> >
- , <a href="./next.html" class="identifier">next</a>< second<<a href="./placeholders.html" class="identifier">_1</a>> >
- , second<<a href="./placeholders.html" class="identifier">_1</a>>
- >
- >
- >::type p;
- <a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( p::first::value, ==, 8 );
- <a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( p::second::value, ==, 3 );
- </pre>
- </div>
- <div class="section" id="id1275">
- <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
- <p><a class="reference internal" href="./data-types.html">Data Types</a>, <a class="reference internal" href="./sequences.html">Sequences</a>, <a class="reference internal" href="./trivial-metafunctions-summary.html#first">first</a>, <a class="reference internal" href="./trivial-metafunctions-summary.html#second">second</a></p>
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