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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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