for_each

Description

Applies a unary function object to each element of a sequence.

Synopsis

template<
    typename Sequence,
    typename F
    >
typename result_of::for_each<Sequence, F>::type for_each(
    Sequence& seq, F f);

Table 1.43. Parameters

Parameter	Requirement	Description
`seq`	A model of Forward Sequence, `f(e)` must be a valid expression for each element `e` in `seq`	Operation's argument
`f`	A unary Regular Callable Object	Operation's argument

Expression Semantics

for_each(seq, f);

Return type: void

Semantics: Calls f(e) for each element e in seq.

Complexity

Linear, exactly result_of::size<Sequence>::value applications of f.

Header

#include <boost/fusion/algorithm/iteration/for_each.hpp>
#include <boost/fusion/include/for_each.hpp>

Example

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));