65 lines
2.6 KiB
ReStructuredText
65 lines
2.6 KiB
ReStructuredText
.. Sequences/Concepts//Back Extensible Sequence |60
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Back Extensible Sequence
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========================
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Description
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-----------
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A |Back Extensible Sequence| is an |Extensible Sequence| that supports amortized constant
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time insertion and removal operations at the end.
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Refinement of
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-------------
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|Extensible Sequence|
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Expression requirements
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-----------------------
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In addition to the requirements defined in |Extensible Sequence|,
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for any |Back Extensible Sequence| ``s`` the following must be met:
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+-------------------------------+-------------------------------+---------------------------+
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| Expression | Type | Complexity |
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+===============================+===============================+===========================+
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| ``push_back<s,x>::type`` | |Back Extensible Sequence| | Amortized constant time |
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+-------------------------------+-------------------------------+---------------------------+
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| ``pop_back<s>::type`` | |Back Extensible Sequence| | Amortized constant time |
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+-------------------------------+-------------------------------+---------------------------+
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| ``back<s>::type`` | Any type | Amortized constant time |
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+-------------------------------+-------------------------------+---------------------------+
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Expression semantics
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--------------------
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|Semantics disclaimer...| |Extensible Sequence|.
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+-------------------------------+-----------------------------------------------------------+
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| Expression | Semantics |
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+===============================+===========================================================+
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| ``push_back<s,x>::type`` | Equivalent to ``insert<s,end<s>::type,x>::type``; |
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| | see |push_back|. |
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+-------------------------------+-----------------------------------------------------------+
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| ``pop_back<v>::type`` | Equivalent to ``erase<s,end<s>::type>::type``; |
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| | see |pop_back|. |
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+-------------------------------+-----------------------------------------------------------+
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| ``back<s>::type`` | The last element in the sequence; see |back|. |
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+-------------------------------+-----------------------------------------------------------+
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Models
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------
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* |vector|
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* |deque|
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See also
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--------
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|Sequences|, |Extensible Sequence|, |Front Extensible Sequence|, |push_back|, |pop_back|, |back|
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