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[/
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:remove_if remove_if]
[heading Prototype]
``
template<
class ForwardRange,
class UnaryPredicate
>
typename range_iterator<ForwardRange>::type
remove_if(ForwardRange& rng, UnaryPredicate pred);
template<
class ForwardRange,
class UnaryPredicate
>
typename range_iterator<const ForwardRange>::type
remove_if(const ForwardRange& rng, UnaryPredicate pred);
template<
range_return_value re,
class ForwardRange,
class UnaryPredicate
>
typename range_return<ForwardRange,re>::type
remove_if(ForwardRange& rng, UnaryPredicate pred);
template<
range_return_value re,
class ForwardRange,
class UnaryPredicate
>
typename range_return<const ForwardRange,re>::type
remove_if(const ForwardRange& rng, UnaryPredicate pred);
``
[heading Description]
`remove_if` removes from `rng` all of the elements `x` for which `pred(x)` is `true`. The versions of `remove_if` that return an iterator, return an iterator `new_last` such that the range `[begin(rng), new_last)` contains no elements where `pred(x)` is `true`. The iterators in the range `[new_last, end(rng))` are dereferenceable, but the elements are unspecified.
[heading Definition]
Defined in the header file `boost/range/algorithm/remove_if.hpp`
[heading Requirements]
* `ForwardRange` is a model of the __forward_range__ Concept.
* `ForwardRange` is mutable.
* `UnaryPredicate` is a model of the `PredicateConcept`.
* `ForwardRange`'s value type is convertible to `UnaryPredicate`'s argument type.
[heading Complexity]
Linear. `remove_if` performs exactly `distance(rng)` applications of `pred`.
[endsect]
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