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< title > Swappable Iterator Concept< / title >
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< h1 class = "title" > Swappable Iterator Concept< / h1 >
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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) -->
< p > A class or built-in type < tt class = "docutils literal" > < span class = "pre" > X< / span > < / tt > models the < em > Swappable Iterator< / em > concept
if, in addition to < tt class = "docutils literal" > < span class = "pre" > X< / span > < / tt > being Copy Constructible, the following
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expressions are valid and respect the stated semantics.< / p >
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< tr > < th class = "head" colspan = "3" > Swappable Iterator Requirements (in addition to Copy Constructible)< / th >
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< / tr >
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< tr > < th class = "head" > Expression< / th >
< th class = "head" > Return Type< / th >
< th class = "head" > Postcondition< / th >
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< tr > < td > < tt class = "docutils literal" > < span class = "pre" > iter_swap(a,< / span > < span class = "pre" > b)< / span > < / tt > < / td >
< td > < tt class = "docutils literal" > < span class = "pre" > void< / span > < / tt > < / td >
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< td > the pointed to values are
exchanged< / td >
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< dt > [< em > Note:< / em > An iterator that is a model of the < em > Readable< / em > and < em > Writable Iterator< / em > concepts< / dt >
< dd > is also a model of < em > Swappable Iterator< / em > . < em > --end note< / em > ]< / dd >
< / dl >
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< a class = "reference external" href = "SwappableIterator.rst" > View document source< / a > .
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