prefixed gnu style attributes are ignored on tag types

Clang Frontend
1

Greetings,

It looks like clang parser ignores gnu style attributes prefixed on the tag types. For example (assume attr is an implementation defined attribute):

class attribute((attr)) foo ; // works

attribute((attr)) class foo; // doesn’t work; the attribute is parsed while parsing declaration specifiers but doesn’t get merged into the attribute list while parsing the class specifier. So the attribute never makes to Sema.

I am wondering why the parser ignores the prefixed attributes. Is this for gcc compatibility? (from http://gcc.gnu.org/onlinedocs/gcc/Type-Attributes.html#Type-Attributes, it looks like prefixed attribute is not one of the “legal” syntax of gcc type attributes).

Cheers

~Michael

2

That position would apply to the declared objects, so we should at least diagnose that they're being ignored here.

John.