On 26/01/2015 10:00, Philipp Janda wrote:
Am 26.01.2015 um 08:51 schröbte William Ahern:The macro arguments might themselves be comma expressions. So the parentheses aren't useless.You can't have comma expressions without parentheses in argument lists. #define X(a, b) ... X(1, 2); /* ok */ X(1, 2, 3); /* constraint violation: wrong number of arguments */ X((1, 2), 3); /* ok, using comma expression as first argument */
What about vararg functions? (My C is rusty, so it can be an invalid remark!)Of course, this discussion is mostly theoretical, I would say as above the parentheses are here mostly for consistency (with other macros) and common practice.
-- Philippe Lhoste -- (near) Paris -- France -- http://Phi.Lho.free.fr -- -- -- -- -- -- -- -- -- -- -- -- -- --