Re: [PATCH] Documentation: Explain a second alternative for multi-line macros.

From: Segher Boessenkool
Date: Sun Dec 31 2006 - 21:41:44 EST

In this case, the second form
should be used when the macro needs to return a value (and you can't
use an inline function for whatever reason), whereas the first form
should be used at all other times.

that's a fair point, although it's certainly not the coding style
that's in play now. for example,

#define setcc(cc) ({ \
partial_status &= ~(SW_C0|SW_C1|SW_C2|SW_C3); \
partial_status |= (cc) & (SW_C0|SW_C1|SW_C2|SW_C3); })

This _does_ return a value though, bad example.


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