The BOOST_PP_BOOL macro performs a boolean conversion on its operand.

Usage

BOOST_PP_BOOL(x)

Arguments

x
The value to be converted.  Valid values range from 0 to BOOST_PP_LIMIT_MAG*.

Remarks

If x is 0, this macro expands to 0.  Otherwise it expands to 1.
*If BOOST_PP_CONFIG_FLAGS does not include BOOST_PP_CONFIG_EDG, this macro can convert an infinite range--e.g. BOOST_PP_BOOL(123456789).  However, it is not safe to rely on this behavior unless it is known that EDG-based compilers will never be used.

See Also

Requirements

Header:  <boost/preprocessor/logical/bool.hpp>

Sample Code

#include <boost/preprocessor/logical/bool.hpp>

BOOST_PP_BOOL(6) // expands to 1
BOOST_PP_BOOL(0) // expands to 0

#if ~BOOST_PP_CONFIG_FLAGS & BOOST_PP_CONFIG_EDG

BOOST_PP_BOOL(123456789) // expands to 1

#endif