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template<class SinglePassRange, class UnaryPredicate> typename range_iterator<SinglePassRange>::type find_if(SinglePassRange& rng, UnaryPredicate pred); template< range_return_value re, class SinglePassRange, class UnaryPredicate > typename range_return<SinglePassRange, re>::type find_if(SinglePassRange& rng, UnaryPredicate pred);
The versions of find_if
that return an iterator, returns the first iterator in the range rng
such that pred(*i)
is true
.
end(rng)
is returned if no such iterator exists.
The versions of find_if
that return a range_return
,
defines found in the same manner as the returned iterator described above.
Defined in the header file boost/range/algorithm/find_if.hpp
SinglePassRange
is
a model of the Single
Pass Range Concept.
UnaryPredicate
is
a model of the PredicateConcept
.
SinglePassRange
is convertible to the argument type of UnaryPredicate
.
For each iterator i
in
rng
, *i
is in the domain of UnaryPredicate
.
Linear. At most distance(rng)
invocations of pred
.