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7 <title>The MPL Reference Manual: Front Extensible Sequence
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14 <div class=
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"front-extensible-sequence">
15 <h1><a class=
"toc-backref" href=
"./concepts.html#id1399">Front Extensible Sequence
</a></h1>
16 <div class=
"section" id=
"id17">
17 <h3><a class=
"subsection-title" href=
"#description" name=
"description">Description
</a></h3>
18 <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
19 time insertion and removal operations at the beginning.
</p>
21 <div class=
"section" id=
"id18">
22 <h3><a class=
"subsection-title" href=
"#refinement-of" name=
"refinement-of">Refinement of
</a></h3>
23 <p><a class=
"reference internal" href=
"./extensible-sequence.html">Extensible Sequence
</a></p>
25 <div class=
"section" id=
"id19">
26 <h3><a class=
"subsection-title" href=
"#expression-requirements" name=
"expression-requirements">Expression requirements
</a></h3>
27 <p>In addition to the requirements defined in
<a class=
"reference internal" href=
"./extensible-sequence.html">Extensible Sequence
</a>,
28 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>
29 <table border=
"1" class=
"docutils table">
35 <thead valign=
"bottom">
36 <tr><th class=
"head">Expression
</th>
37 <th class=
"head">Type
</th>
38 <th class=
"head">Complexity
</th>
42 <tr><td><tt class=
"literal"><span class=
"pre"><a href=
"./push-front.html" class=
"identifier">push_front
</a><s,x
>::type
</span></tt></td>
43 <td><a class=
"reference internal" href=
"./front-extensible-sequence.html">Front Extensible Sequence
</a></td>
44 <td>Amortized constant time
</td>
46 <tr><td><tt class=
"literal"><span class=
"pre"><a href=
"./pop-front.html" class=
"identifier">pop_front
</a><s
>::type
</span></tt></td>
47 <td><a class=
"reference internal" href=
"./front-extensible-sequence.html">Front Extensible Sequence
</a></td>
48 <td>Amortized constant time
</td>
50 <tr><td><tt class=
"literal"><span class=
"pre"><a href=
"./front.html" class=
"identifier">front
</a><s
>::type
</span></tt></td>
52 <td>Amortized constant time
</td>
57 <div class=
"section" id=
"id20">
58 <h3><a class=
"subsection-title" href=
"#expression-semantics" name=
"expression-semantics">Expression semantics
</a></h3>
59 <p>The semantics of an expression are defined only
60 where they differ from, or are not defined in
<a class=
"reference internal" href=
"./extensible-sequence.html">Extensible Sequence
</a>.
</p>
61 <table border=
"1" class=
"docutils table">
66 <thead valign=
"bottom">
67 <tr><th class=
"head">Expression
</th>
68 <th class=
"head">Semantics
</th>
72 <tr><td><tt class=
"literal"><span class=
"pre"><a href=
"./push-front.html" class=
"identifier">push_front
</a><s,x
>::type
</span></tt></td>
73 <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>;
74 see
<a class=
"reference internal" href=
"./push-front.html">push_front
</a>.
</td>
76 <tr><td><tt class=
"literal"><span class=
"pre"><a href=
"./pop-front.html" class=
"identifier">pop_front
</a><v
>::type
</span></tt></td>
77 <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>;
78 see
<a class=
"reference internal" href=
"./pop-front.html">pop_front
</a>.
</td>
80 <tr><td><tt class=
"literal"><span class=
"pre"><a href=
"./front.html" class=
"identifier">front
</a><s
>::type
</span></tt></td>
81 <td>The first element in the sequence; see
<a class=
"reference internal" href=
"./front.html">front
</a>.
</td>
86 <div class=
"section" id=
"id21">
87 <h3><a class=
"subsection-title" href=
"#models" name=
"models">Models
</a></h3>
89 <li><a class=
"reference internal" href=
"./vector.html">vector
</a></li>
90 <li><a class=
"reference internal" href=
"./list.html">list
</a></li>
93 <div class=
"section" id=
"id22">
94 <h3><a class=
"subsection-title" href=
"#see-also" name=
"see-also">See also
</a></h3>
95 <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>
96 <!-- Sequences/Concepts//Back Extensible Sequence |60 -->
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102 <td><div class=
"copyright-footer"><div class=
"copyright">Copyright ©
2001-
2009 Aleksey Gurtovoy and David Abrahams
</div>
103 Distributed under the Boost Software License, Version
1.0. (See accompanying
104 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>)
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