2006-09-11 22:27:29 +00:00
|
|
|
.. 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)
|
|
|
|
|
|
2004-01-27 17:03:46 +00:00
|
|
|
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``. |
|
|
|
|
|
+-------------+-----------+-----------------------------------+
|
