[Bug c++/12620] New: compatibility issue with anonymous struct/union support

[jbeulich at novell dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12620

           Summary: compatibility issue with anonymous struct/union support
           Product: gcc
           Version: 3.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jbeulich at novell dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu

In

class ccc {
public:
	union {
		int i;
	};
};

all other compilers I can check with (Intel, Microsoft, Borland, MetroWerks)
treat i as a member of ccc. Since the feature is documented to exist for
compatibility reasons, the behavior should be compatible, too.

This can easily be tested with above declaration and the code

template<typename T> void test(T p);

void test() {
	test(&ccc::i);
}

by observing what template instantiation is selected by the compiler.