2006-09-11 22:27:29 +00:00
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.. 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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2004-01-27 17:03:46 +00:00
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Swappable Iterator Concept
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..........................
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A class or built-in type ``X`` models the *Swappable Iterator* concept
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if, in addition to ``X`` being Copy Constructible, the following
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expressions are valid and respect the stated semantics.
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+---------------------------------------------------------------------+
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|Swappable Iterator Requirements (in addition to Copy Constructible) |
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+-------------------------+-------------+-----------------------------+
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|Expression |Return Type |Postcondition |
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+=========================+=============+=============================+
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|``iter_swap(a, b)`` |``void`` |the pointed to values are |
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| | |exchanged |
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+-------------------------+-------------+-----------------------------+
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[*Note:* An iterator that is a model of the *Readable* and *Writable Iterator* concepts
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is also a model of *Swappable Iterator*. *--end note*]
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