[cfe-commits] [patch] Disallow decltype in qualified declarator-ids

[David Blaikie]

8.3\1 dcl.meaning states:
"The nested-name-specifier of a qualified declarator-id shall not
begin with a decltype-specifier."

& this patch implements that, disallowing things like:

struct foo {
  static int i;
};

int decltype(foo())::i;

The source range in the error message isn't perfect (due to the
unaddressed fixme in DecltypeTypeLoc - it doesn't have the full source
range, just the location of the 'decltype' keyword. I'll address this
separately) & I haven't provided a fixit for this at the moment (it'd
be possible to suggest replacing the decltype with the actual
qualified name, at least for now - I'm not sure what we'll be doing
about unnameable types that come with lambdas, though).

Thanks,
- David
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