[PATCH] c++: Treat OPAQUE_TYPE types as an aggregate type [PR97947]

[Peter Bergner]

On 12/2/20 2:36 PM, Jakub Jelinek wrote:
> Just a random question, do you have some testsuite coverage for constant
> expression evaluation (primarily C++) with the opaque types, do you verify
> any object with that type is treated as something that may not appear in
> constant expression and does constexpr.c properly punt on it rather than
> ICE?

We don't, since we don't support that with these specific types, but yeah,
an ICE isn't as good as an error message.  We'll look into adding some.  
Thanks.

Peter