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You do need to omit whitespace between the name and the opening parenthesis when defining a functionlike macro, but it doesn't matter when you're calling it.
by rwallace 11y ago
You do need to omit whitespace between the name and the opening parenthesis when defining a functionlike macro, but it doesn't matter when you're calling it.
- krylon 11y agoI furiously looked at the C standard (C99, anyway) and the documentation to the gcc preprocessor, and have to admit somewhat embarassedly, that you are right. The gcc preprocessor documentation clearly states: > "If you use the macro name followed by something other than an open-parenthesis (after ignoring any spaces, tabs and comments that follow), it is not a call to the macro, and the preprocessor does not change what you have written." Thanks for pointing this out to me!