libs/range/doc/reference/adaptors/map_values.qbk
[/
Copyright 2010 Neil Groves
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)
/]
[section:map_values map_values]
[table
[[Syntax] [Code]]
[[Pipe] [`rng | boost::adaptors::map_values`]]
[[Function] [`boost::adaptors::values(rng)`]]
]
* [*Precondition:] The `value_type` of the range is an instantiation of `std::pair`.
* [*Postcondition:] For all elements `x` in the returned range, `x` is the result of `y.second` where `y` is the corresponding element in the original range.
* [*Range Category:] __single_pass_range__
* [*Range Return Type:] for constant ranges, `boost::select_second_const<decltype(rng)>` otherwise `boost::select_second_mutable<decltype(rng)>`
* [*Returned Range Category:] The range category of `rng`.
[section:map_values_example map_values example]
[import ../../../test/adaptor_test/map_values_example.cpp]
[map_values_example]
[endsect]
This would produce the output:
``
0,10,20,30,40,50,60,70,80,90,
``
[endsect]
