3rdParty/boost/1.78.0/libs/iterator/doc/SwappableIterator.rst
.. 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]