On 10/26/18 2:02 PM, Paolo Carlini wrote:
On 26/10/18 17:18, Jason Merrill wrote:
On Fri, Oct 26, 2018 at 4:52 AM Paolo Carlini
<paolo.carl...@oracle.com> wrote:
On 24/10/18 22:41, Jason Merrill wrote:
On 10/15/18 12:45 PM, Paolo Carlini wrote:
&& ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
+ && TREE_CODE (declspecs->type) != DECLTYPE_TYPE
&& MAYBE_CLASS_TYPE_P (declspecs->type))
I would think that the MAYBE_CLASS_TYPE_P here should be CLASS_TYPE_P,
and then we can remove the TYPENAME_TYPE check. Or do we want to
allow template type parameters for some reason?
Indeed, it would be nice to just use OVERLOAD_TYPE_P. However it seems
we at least want to let through TEMPLATE_TYPE_PARMs representing 'auto'
- otherwise Dodji's check a few lines below which fixed c++/51473
doesn't work anymore - and also BOUND_TEMPLATE_TEMPLATE_PARM, otherwise
we regress on template/spec32.C and template/ttp22.C because we don't
diagnose the shadowing anymore. Thus, I would say either we keep on
using MAYBE_CLASS_TYPE_P or we pick what we need, possibly we add a
comment?
Aha. I guess the answer is not to restrict that test any more, but
instead to fix the code further down so it gives a proper diagnostic
rather than call warn_misplaced_attr_for_class_type.
I see. Thus something like the below? It passes testing on x86_64-linux.
+ if ((!declared_type || TREE_CODE (declared_type) == DECLTYPE_TYPE)
+ && ! saw_friend && !error_p)
permerror (input_location, "declaration does not declare anything");
I see no reason to make this specific to decltype. Maybe move this
diagnostic into the final 'else' block with the other declspec
diagnostics and not look at declared_type at all?
+ if (declspecs->attributes && warn_attributes && declared_type
+ && TREE_CODE (declared_type) != DECLTYPE_TYPE)
I think we do want to give a diagnostic about useless attributes, not
skip it.
Jason
