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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)
- Swappable Iterator Concept
- ..........................
- A class or built-in type ``X`` models the *Swappable Iterator* concept
- if, in addition to ``X`` being Copy Constructible, the following
- expressions are valid and respect the stated semantics.
- +---------------------------------------------------------------------+
- |Swappable Iterator Requirements (in addition to Copy Constructible) |
- +-------------------------+-------------+-----------------------------+
- |Expression |Return Type |Postcondition |
- +=========================+=============+=============================+
- |``iter_swap(a, b)`` |``void`` |the pointed to values are |
- | | |exchanged |
- +-------------------------+-------------+-----------------------------+
- [*Note:* An iterator that is a model of the *Readable* and *Writable Iterator* concepts
- is also a model of *Swappable Iterator*. *--end note*]
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