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On 1-Sep-05, at 12:51 PM, Boyko Bantchev wrote:
On 9/1/05, Rici Lake <lua@ricilake.net> wrote:None of those test cases has a "," unprotected by "("..")"Is there a case where `,' is neither protected nor protectable or trivially changeable to s.th. that does not need protection?
I think there are usually workarounds, but they can be ugly. Doing a {} block as a macro argument, whether or not it has the {} around it, is prone to errors:
// The one I mentioned before:
do ({ int i, j; ...
// Initializers:
do ({ struct npair i = {2, 3}; ...
// Templates:
do ({ Pair<int, double> i; ...
That last one is probably the hardest to get around. Of course, it only
applies to c++.
This reference shows an interesting partial workaround within the Boost framework: http://www.kangaroologic.com/interfaces/libs/interfaces/doc/index.html? path=3.3.10
There was also some discussion about this on the FOREACH macro review earlier this year.