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Applies a unary function object to each element of a sequence.
template<
typename Sequence,
typename F
>
typename result_of::for_each<Sequence, F>::type for_each(
Sequence& seq, F f);
Table 1.45. Parameters
|
Parameter |
Requirement |
Description |
|---|---|---|
|
|
A model of Forward
Sequence, |
Operation's argument |
|
|
A unary Regular Callable Object |
Operation's argument |
for_each(seq, f);
Return type: void
Semantics: Calls f(e) for each element e
in seq.
Linear, exactly applications of result_of::size<Sequence>::valuef.
#include <boost/fusion/algorithm/iteration/for_each.hpp> #include <boost/fusion/include/for_each.hpp>
struct increment { template<typename T> void operator()(T& t) const { ++t; } }; ...vector<int,int> vec(1,2);for_each(vec, increment()); assert(vec ==make_vector(2,3));