Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

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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
    >
unspecified insert(Sequence const& seq, Pos const& pos, T const& t);

Table1.65.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.

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));

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