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| <title>The MPL Reference Manual: Front Extensible Sequence</title> |
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| <div class="section" id="front-extensible-sequence"> |
| <h1><a class="toc-backref" href="./concepts.html#id1399">Front Extensible Sequence</a></h1> |
| <div class="section" id="id17"> |
| <h3><a class="subsection-title" href="#description" name="description">Description</a></h3> |
| <p>A <a class="reference internal" href="./front-extensible-sequence.html">Front Extensible Sequence</a> is an <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a> that supports amortized constant |
| time insertion and removal operations at the beginning.</p> |
| </div> |
| <div class="section" id="id18"> |
| <h3><a class="subsection-title" href="#refinement-of" name="refinement-of">Refinement of</a></h3> |
| <p><a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a></p> |
| </div> |
| <div class="section" id="id19"> |
| <h3><a class="subsection-title" href="#expression-requirements" name="expression-requirements">Expression requirements</a></h3> |
| <p>In addition to the requirements defined in <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>, |
| for any <a class="reference internal" href="./back-extensible-sequence.html">Back Extensible Sequence</a> <tt class="literal"><span class="pre">s</span></tt> the following must be met:</p> |
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| <thead valign="bottom"> |
| <tr><th class="head">Expression</th> |
| <th class="head">Type</th> |
| <th class="head">Complexity</th> |
| </tr> |
| </thead> |
| <tbody valign="top"> |
| <tr><td><tt class="literal"><span class="pre"><a href="./push-front.html" class="identifier">push_front</a><s,x>::type</span></tt></td> |
| <td><a class="reference internal" href="./front-extensible-sequence.html">Front Extensible Sequence</a></td> |
| <td>Amortized constant time</td> |
| </tr> |
| <tr><td><tt class="literal"><span class="pre"><a href="./pop-front.html" class="identifier">pop_front</a><s>::type</span></tt></td> |
| <td><a class="reference internal" href="./front-extensible-sequence.html">Front Extensible Sequence</a></td> |
| <td>Amortized constant time</td> |
| </tr> |
| <tr><td><tt class="literal"><span class="pre"><a href="./front.html" class="identifier">front</a><s>::type</span></tt></td> |
| <td>Any type</td> |
| <td>Amortized constant time</td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="section" id="id20"> |
| <h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3> |
| <p>The semantics of an expression are defined only |
| where they differ from, or are not defined in <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>.</p> |
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| <colgroup> |
| <col width="34%" /> |
| <col width="66%" /> |
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| <thead valign="bottom"> |
| <tr><th class="head">Expression</th> |
| <th class="head">Semantics</th> |
| </tr> |
| </thead> |
| <tbody valign="top"> |
| <tr><td><tt class="literal"><span class="pre"><a href="./push-front.html" class="identifier">push_front</a><s,x>::type</span></tt></td> |
| <td>Equivalent to <tt class="literal"><span class="pre"><a href="./insert.html" class="identifier">insert</a><s,<a href="./begin.html" class="identifier">begin</a><s>::type,x>::type</span></tt>; |
| see <a class="reference internal" href="./push-front.html">push_front</a>.</td> |
| </tr> |
| <tr><td><tt class="literal"><span class="pre"><a href="./pop-front.html" class="identifier">pop_front</a><v>::type</span></tt></td> |
| <td>Equivalent to <tt class="literal"><span class="pre"><a href="./erase.html" class="identifier">erase</a><s,<a href="./begin.html" class="identifier">begin</a><s>::type>::type</span></tt>; |
| see <a class="reference internal" href="./pop-front.html">pop_front</a>.</td> |
| </tr> |
| <tr><td><tt class="literal"><span class="pre"><a href="./front.html" class="identifier">front</a><s>::type</span></tt></td> |
| <td>The first element in the sequence; see <a class="reference internal" href="./front.html">front</a>.</td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="section" id="id21"> |
| <h3><a class="subsection-title" href="#models" name="models">Models</a></h3> |
| <ul class="simple"> |
| <li><a class="reference internal" href="./vector.html">vector</a></li> |
| <li><a class="reference internal" href="./list.html">list</a></li> |
| </ul> |
| </div> |
| <div class="section" id="id22"> |
| <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3> |
| <p><a class="reference internal" href="./sequences.html">Sequences</a>, <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>, <a class="reference internal" href="./back-extensible-sequence.html">Back Extensible Sequence</a>, <a class="reference internal" href="./push-front.html">push_front</a>, <a class="reference internal" href="./pop-front.html">pop_front</a>, <a class="reference internal" href="./front.html">front</a></p> |
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| <td><div class="copyright-footer"><div class="copyright">Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</div> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
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