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33 lines
2.2 KiB
ReStructuredText
33 lines
2.2 KiB
ReStructuredText
.. Copyright David Abrahams 2006. Distributed under the Boost
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.. Software License, Version 1.0. (See accompanying
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.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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Single Pass Iterator Concept
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............................
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A class or built-in type ``X`` models the *Single Pass Iterator*
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concept if the following expressions are valid and respect the stated
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semantics.
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+------------------------------------------------------------------------------------------+
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|Single Pass Iterator Requirements (in addition to Incrementable Iterator and Equality |
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|Comparable) |
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+--------------------------------+-----------------------------+---------------------------+
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|Expression |Return Type |Assertion/Semantics / |
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| | |Pre-/Post-condition |
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+================================+=============================+===========================+
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|``++r`` |``X&`` |pre: ``r`` is |
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| | |dereferenceable; post: |
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| | |``r`` is dereferenceable or|
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| | |``r`` is past-the-end |
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+--------------------------------+-----------------------------+---------------------------+
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|``a == b`` |convertible to ``bool`` |``==`` is an equivalence |
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| | |relation over its domain |
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+--------------------------------+-----------------------------+---------------------------+
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|``a != b`` |convertible to ``bool`` |``!(a == b)`` |
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+--------------------------------+-----------------------------+---------------------------+
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|``iterator_traversal<X>::type`` |Convertible to | |
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| |``single_pass_traversal_tag``| |
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+--------------------------------+-----------------------------+---------------------------+
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