is_empty_or_1.hpp File Reference

#include <boost/preprocessor/control/iif.hpp>
#include <boost/preprocessor/facilities/empty.hpp>
#include <boost/preprocessor/facilities/identity.hpp>
#include <boost/preprocessor/facilities/is_1.hpp>
#include <boost/preprocessor/facilities/is_empty.hpp>

Include dependency graph for is_empty_or_1.hpp:

Macros
#define	BOOST_PP_IS_EMPTY_OR_1(x)

Macro Definition Documentation

#define BOOST_PP_IS_EMPTY_OR_1

(

x

)

Value:

BOOST_PP_IIF( \
        BOOST_PP_IS_EMPTY(x BOOST_PP_EMPTY()), \
        BOOST_PP_IDENTITY(1), \
        BOOST_PP_IS_1 \
    )(x) \