Preprocessing -- FWEBInfo

Prev: WEB macros Up: Macros Top: Top FWEB preprocessor commands may appear in either the definition or the code parts. But BEWARE: No matter where they appear, they are expanded during INPUT, not output. (This is probably a design flaw.)

@#define identifier --- Define a WEB macro; equivalent to `@m'.
@#undef identifier  --- Undefine a WEB macro.


@#ifdef identifier  --- Is WEB macro defined?  Equivalent to

                         `@#if defined identifier'.

@#ifndef identifier --- Is WEB macro not defined?  Equivalent to

                         `@#if !defined identifier'.


@#if expression

@#elif expression

@#else

@#endif