projects / ceph.git / blame
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|---|---|---|
| 7c673cae FG |
1 | .. Sequences/Concepts//Bidirectional Sequence |20 |
| 2 | ||
| 3 | Bidirectional Sequence | |
| 4 | ====================== | |
| 5 | ||
| 6 | Description | |
| 7 | ----------- | |
| 8 | ||
| 9 | A |Bidirectional Sequence| is a |Forward Sequence| whose iterators model | |
| 10 | |Bidirectional Iterator|. | |
| 11 | ||
| 12 | Refinement of | |
| 13 | ------------- | |
| 14 | ||
| 15 | |Forward Sequence| | |
| 16 | ||
| 17 | ||
| 18 | Expression requirements | |
| 19 | ----------------------- | |
| 20 | ||
| 21 | In addition to the requirements defined in |Forward Sequence|, | |
| 22 | for any |Bidirectional Sequence| ``s`` the following must be met: | |
| 23 | ||
| 24 | +---------------------------+-----------------------------------+---------------------------+ | |
| 25 | | Expression | Type | Complexity | | |
| 26 | +===========================+===================================+===========================+ | |
| 27 | | ``begin<s>::type`` | |Bidirectional Iterator| | Amortized constant time | | |
| 28 | +---------------------------+-----------------------------------+---------------------------+ | |
| 29 | | ``end<s>::type`` | |Bidirectional Iterator| | Amortized constant time | | |
| 30 | +---------------------------+-----------------------------------+---------------------------+ | |
| 31 | | ``back<s>::type`` | Any type | Amortized constant time | | |
| 32 | +---------------------------+-----------------------------------+---------------------------+ | |
| 33 | ||
| 34 | ||
| 35 | Expression semantics | |
| 36 | -------------------- | |
| 37 | ||
| 38 | |Semantics disclaimer...| |Forward Sequence|. | |
| 39 | ||
| 40 | +---------------------------+-----------------------------------------------------------------------+ | |
| 41 | | Expression | Semantics | | |
| 42 | +===========================+=======================================================================+ | |
| 43 | | ``back<s>::type`` | The last element in the sequence; see |back|. | | |
| 44 | +---------------------------+-----------------------------------------------------------------------+ | |
| 45 | ||
| 46 | ||
| 47 | Models | |
| 48 | ------ | |
| 49 | ||
| 50 | * |vector| | |
| 51 | * |range_c| | |
| 52 | ||
| 53 | ||
| 54 | See also | |
| 55 | -------- | |
| 56 | ||
| 57 | |Sequences|, |Forward Sequence|, |Random Access Sequence|, |Bidirectional Iterator|, |begin| / |end|, |back| | |
| 58 | ||
| 59 | ||
| 60 |