http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44317
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |UNCONFIRMED
CC| |manu at gcc dot gnu.org
Resolution|INVALID |---
--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #2)
> Because the eating of comma is a GNU extension. So it is enabled in GNU
> compilation modes (the default, for C -std=gnu89, -std=gnu99, -std=gnu11,
> for C++ -std=gnu++98, -std=gnu++03, -std=gnu++11, -std=gnu++0x,
> -std=gnu++1y) but not in the more strict standard modes (-std=c{89,99,11},
> -std=c++{98,03,11,0x,1y}).
But g++ does not warn with -Wpedantic, as it should. Instead it gives a very
strange message about C99 in C++:
test.cc:7:17: warning: ISO C99 requires rest arguments to be used [enabled by
default]
ASSERT( false );
^
Clang++ does the right thing:
test.cc:2:39: warning: token pasting of ',' and __VA_ARGS__ is a GNU extension
[-Wgnu]
#define ASSERT( cnd, ... ) SomeClass(),##__VA_ARGS__
^
test.cc:3:39: warning: token pasting of ',' and __VA_ARGS__ is a GNU extension
[-Wgnu]
#define FAIL( ... ) SomeClass(),##__VA_ARGS__
^
