On Aug 14, 2009, at 3:30 PM, Chris Lattner wrote:
On Aug 14, 2009, at 3:20 PM, Eli Friedman wrote:
On Fri, Aug 14, 2009 at 3:12 PM, Ted Kremenek<[email protected]>
wrote:
Unless I'm mistaken, this breaks constructs like the following:
__attribute((malloc)) void *(*f)();
-Eli
I implemented handling of this case, but I noticed that GCC
actually rejects
attribute 'malloc' being applied to function pointers ("warning:
'malloc'
attribute ignored"). Should we do the same in Clang? For function
pointers, the malloc attribute really a property of the pointer
type, not
the declaration, but apparently GCC doesn't even reason about that.
I think it's better to be self-consistent here over being consistent
with gcc, as long as we don't break compatibility. Function
attributes are confusing enough without making different attributes
act differently.
The problem is that this attribute is really a decl attribute, not a
type attribute. If I have two functions with the same prototype
(but one is attribute malloc) I should be able to assign them to the
same function pointer, no? If we made it part of the type system,
we'd have to consider the attribute for assignment compatibility etc.
Yes, this was my thought exactly. Unless it is part of the type, the
attribute doesn't make sense for function pointers._______________________________________________
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