Je 1999/08/27(5)/19:08, joost witteveen montris sian geniecon skribante: > I've got a define > > #define WRAP_STAT __xstat > > and from the macro WRAP_STAT, I want to define > > #define NEXT_STAT next___xstat > and > #define WRAP_STAT_QUOTE "__xstat"
[What doesn't work:] > #define NEXT_STAT next_ ## WRAP_STAT [..] > #define QUOTE(a) #a > #define WRAP_STAT_QUOTE QUOTE(WRAP_STAT) [..] OK, if everything else fails, read the docs. So, now I finally found (in cpp.info, `Argument Prescan') how to do it. Still, I'd very much like to hear if anyone knows how portable this is: #define WRAP_STAT __xstat #define NEXT_STAT(a,b,c) (CONCAT_LEVEL(WRAP_STAT))(a,b,c) #define CONCAT_LEVEL(X) CONCAT(X) #define CONCAT(X) next_ ## X NEXT_STAT(1,2,3) #define WRAP_STAT_QUOTE QUOTE_LEVEL(WRAP_STAT) #define QUOTE_LEVEL(x) QUOTE_MACRO(x) #define QUOTE_MACRO(y) #y WRAP_STAT_QUOTE (at least for GNU cpp it works!) > (Please also reply to me in person, as I am not subscribed to this > list). -- joostje
