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| <h1><a class="toc-backref" href="./iterator-metafunctions.html#id1456">next</a></h1> |
| <div class="section" id="id421"> |
| <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3> |
| <pre class="literal-block"> |
| template< |
| typename Iterator |
| > |
| struct <a href="./next.html" class="identifier">next</a> |
| { |
| typedef <em>unspecified</em> type; |
| }; |
| </pre> |
| </div> |
| <div class="section" id="id422"> |
| <h3><a class="subsection-title" href="#description" name="description">Description</a></h3> |
| <p>Returns the next iterator in the sequence. [<em>Note:</em> <tt class="literal"><span class="pre"><a href="./next.html" class="identifier">next</a></span></tt> has a number of |
| overloaded meanings, depending on the type of its argument. For instance, |
| if <tt class="literal"><span class="pre">X</span></tt> is an <a class="reference internal" href="./integral-constant.html">Integral Constant</a>, <tt class="literal"><span class="pre"><a href="./next.html" class="identifier">next</a><X></span></tt> returns an incremented |
| <a class="reference internal" href="./integral-constant.html">Integral Constant</a> of the same type. The following specification is |
| iterator-specific. Please refer to the corresponding concept's |
| documentation for the details of the alternative semantics — <em>end note</em>].</p> |
| </div> |
| <div class="section" id="id423"> |
| <h3><a class="subsection-title" href="#header" name="header">Header</a></h3> |
| <pre class="literal-block"> |
| #include <<a href="../../../../boost/mpl/next_prior.hpp" class="header">boost/mpl/next_prior.hpp</a>> |
| </pre> |
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| <div class="section" id="id424"> |
| <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3> |
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| <col width="45%" /> |
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| <thead valign="bottom"> |
| <tr><th class="head">Parameter</th> |
| <th class="head">Requirement</th> |
| <th class="head">Description</th> |
| </tr> |
| </thead> |
| <tbody valign="top"> |
| <tr><td><tt class="literal"><span class="pre">Iterator</span></tt></td> |
| <td><a class="reference internal" href="./forward-iterator.html">Forward Iterator</a>.</td> |
| <td>An iterator to increment.</td> |
| </tr> |
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| <div class="section" id="id425"> |
| <h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3> |
| <p>For any <a class="reference internal" href="./forward-iterator.html">Forward Iterator</a>s <tt class="literal"><span class="pre">iter</span></tt>:</p> |
| <pre class="literal-block"> |
| typedef <a href="./next.html" class="identifier">next</a><iter>::type j; |
| </pre> |
| <table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first"><a class="reference internal" href="./forward-iterator.html">Forward Iterator</a>.</p> |
| </td> |
| </tr> |
| <tr class="field"><th class="field-name">Precondition:</th><td class="field-body"><p class="first"><tt class="literal"><span class="pre">iter</span></tt> is incrementable.</p> |
| </td> |
| </tr> |
| <tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first"><tt class="literal"><span class="pre">j</span></tt> is an iterator pointing to the next element in the sequence, or |
| is past-the-end. If <tt class="literal"><span class="pre">iter</span></tt> is a user-defined iterator, the |
| library-provided default implementation is equivalent to</p> |
| <pre class="last literal-block"> |
| typedef iter::<a href="./next.html" class="identifier">next</a> j; |
| </pre> |
| </td> |
| </tr> |
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| <div class="section" id="id426"> |
| <h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3> |
| <p>Amortized constant time.</p> |
| </div> |
| <div class="section" id="id427"> |
| <h3><a class="subsection-title" href="#example" name="example">Example</a></h3> |
| <pre class="literal-block"> |
| typedef <a href="./vector-c.html" class="identifier">vector_c</a><int,1> v; |
| typedef <a href="./begin.html" class="identifier">begin</a><v>::type first; |
| typedef <a href="./end.html" class="identifier">end</a><v>::type last; |
| |
| <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< <a href="./next.html" class="identifier">next</a><first>::type, last > )); |
| </pre> |
| </div> |
| <div class="section" id="id428"> |
| <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3> |
| <p><a class="reference internal" href="./iterators.html">Iterators</a>, <a class="reference internal" href="./begin.html">begin</a> / <a class="reference internal" href="./end.html">end</a>, <a class="reference internal" href="./prior.html">prior</a>, <a class="reference internal" href="./deref.html">deref</a></p> |
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