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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:replace_if replace_if]
- [heading Prototype]
- ``
- template<class ForwardRange, class UnaryPredicate, class Value>
- ForwardRange& replace_if(ForwardRange& rng, UnaryPredicate pred, const Value& with_what);
- template<class ForwardRange, class UnaryPredicate, class Value>
- const ForwardRange& replace_if(const ForwardRange& rng, UnaryPredicate pred, const Value& with_what);
- ``
- [heading Description]
- `replace_if` replaces every element `x` in `rng` for which `pred(x) == true` with `with_what`. Returns a reference to `rng`.
- [heading Definition]
- Defined in the header file `boost/range/algorithm/replace_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.
- * `Value` is convertible to `ForwardRange`'s value type.
- * `Value` is a model of the `AssignableConcept`.
- [heading Complexity]
- Linear. `replace_if` performs exactly `distance(rng)` applications of `pred`, and at most `distance(rng)` assignments.
- [endsect]
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