Lvalue Iterator Concept

.. 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)

Lvalue Iterator Concept .......................

The Lvalue Iterator concept adds the requirement that the return type of operator* type be a reference to the value type of the iterator.

+-------------------------------------------------------------+ | Lvalue Iterator Requirements | +-------------+-----------+-----------------------------------+ |Expression |Return Type|Note/Assertion | +=============+===========+===================================+ |*a | T& |T is cv | | | |iterator_traits<X>::value_type | | | |where cv is an optional | | | |cv-qualification. | | | |pre: a is | | | |dereferenceable. If a | | | |== b then *a is | | | |equivalent to *b. | +-------------+-----------+-----------------------------------+