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##### insert

###### Description

Returns a new sequence with all the elements of the original, an a new element inserted the position described by a given iterator.

###### Synposis

    template<
        typename Sequence,
        typename Pos,
        typename T
        >
    typename result_of::insert<Sequence const, Pos, T>::type insert(
        Sequence const& seq, Pos const& pos, T const& t);

Table 1.69. Parameters

Parameter | Requirement | Description
--- | --- | ---
`seq` | A model of Forward Sequence | Operation's argument
`pos` | A model of Forward Iterator | The position to insert at
`t` | Any type | The value to insert

###### Expression Semantics

    insert(seq, p, t);

Return type:

- A model of Forward Sequence.
- A model of Associative Sequence if `seq` implements the Associative Sequence model.

Semantics: Returns a new sequence, containing all the elements of `seq`, in their original order, and a new element with the type and value of `t` inserted at iterator `pos`.

###### Complexity

Constant. Returns a view which is lazily evaluated.

###### Header

    #include <boost/fusion/algorithm/transformation/insert.hpp>
    #include <boost/fusion/include/insert.hpp>

###### Example

    const vector<int,int> vec(1,2);
    assert(insert(vec, next(begin(vec)), 3) == make_vector(1,3,2));