The BOOST_PP_SEQ_INSERT macro inserts an element into an seq.

#### Usage

BOOST_PP_SEQ_INSERT(seq, i, elem)

#### Arguments

seq
  The seq into which an element is to be inserted.
i
  The zero-based position in seq where an element is to be inserted. Valid values range from 0 to BOOST_PP_SEQ_SIZE(seq) - 1.
elem
  The element to insert.

#### Remarks

This macro inserts elem before the element at index i.

#### Requirements

Header: <boost/preprocessor/seq/insert.hpp>

#### Sample Code

    #include <boost/preprocessor/seq/insert.hpp>

    #define SEQ (a)(b)(d)

    BOOST_PP_SEQ_INSERT(SEQ, 2, c) // expands to (a)(b)(c)(d)