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