for_each

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##### 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 const& f);

Table 1.39. 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));