Consider code:
----------- test.cpp -------------
class SomeClass {};
#define ASSERT( cnd, ... ) SomeClass(),##__VA_ARGS__
#define FAIL( ... ) SomeClass(),##__VA_ARGS__
void test()
{
ASSERT( false );
FAIL();
}
----------------------------------
$ cpp test.cpp
>>> SomeClass();
>>> SomeClass();
$ cpp -std=c++0x test.cpp
>>> SomeClass();
>>> SomeClass(),;
^^^ extra comma !
Why would the comma not be eaten only in c++0x
and when the ellipsis is the unique parameter of
the macro ?
--
Summary: ,##__VA_ARGS__ comma not eaten with -std=c++0x
Product: gcc
Version: 4.4.4
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: eric dot estievenart at free dot fr
GCC build triplet: 4.4.4 (Debian 4.4.4-1)
GCC host triplet: i686 debian GNU/Linux
GCC target triplet: i486-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44317
