libs/iterator/doc/LvalueIterator.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) 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``. | +-------------+-----------+-----------------------------------+