On Sun, Nov 13, 2011 at 11:53 PM, Paul Mensonides <pmenso57@comcast.net>wrote:
On Sun, 13 Nov 2011 21:10:11 -0800, Jeffrey Lee Hellrung, Jr. wrote:
I'm just curious, is
-------- #define A(...) A(,) --------
legal?
Yes. "Empty" is a valid argument in >= C99 and >= C++0x. An example of when an empty argument actually appears when passing around a cv- qualifier: nothing | const | volatile | const volatile. This is only one of many many scenarios where emptiness is a valid element and has meaning.
Well, in that case, since "clearly" A(,) has two (empty) arguments in its invocation, one must "clearly" conclude that A() has one (empty) argument in its invocation. That was more or less the point of my question, and your logic is sound to me, Paul. - Jeff