Re: [Boost-users] [preprocessor] different macro expansion depending onwhether its argument is defined or not?

Hi,

is it possible to write a preprocessor macro which takes one argument and which expands differently depending on whether the argument is defined or not? Boost solution preferred.

Example:

#define FOO #undef BAR

MY_MACRO(FOO) expands to 1 MY_MACRO(BAR) expands to 0

Kind regards Ingolf

No, I'm afraid not.