The BOOST_PP_ARRAY_PUSH_FRONT macro appends an element to the beginning of an array.

Usage

BOOST_PP_ARRAY_PUSH_FRONT(array, elem)

Arguments

array
The array to append an element to.
elem
The element to append.

Requirements

Header:  <boost/preprocessor/array/push_front.hpp>

Sample Code

#include <boost/preprocessor/array/push_front.hpp>

#define ARRAY (3, (b, c, d))

BOOST_PP_ARRAY_PUSH_FRONT(ARRAY, a) // expands to (4, (a, b, c, d))