The BOOST_PP_ARRAY_REPLACE macro replaces an element in an array.

#### Usage

BOOST_PP_ARRAY_REPLACE(array, i, elem)

#### Arguments

array
  An array to replace an element in.
i
  The zero-based position in array of the element to be replaced. Valid values range from 0 to BOOST_PP_ARRAY_SIZE(array) - 1.
elem
  The replacement element.

#### Remarks

This macro uses BOOST_PP_WHILE interally. Therefore, to use the d parameter passed from other macros that use BOOST_PP_WHILE, see BOOST_PP_ARRAY_REPLACE_D.

#### See Also

- BOOST_PP_ARRAY_REPLACE_D

#### Requirements

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

#### Sample Code

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

    #define ARRAY (3, (a, x, c))

    BOOST_PP_ARRAY_REPLACE(ARRAY, 1, b) // expands to (3, (a, b, c))