yaxunl marked 2 inline comments as done.
yaxunl added inline comments.

================
Comment at: test/SemaCUDA/constexpr-ctor.cu:14-27
+template <class T> struct B {
+  T a;
+  constexpr B() = default;
+};
+
+template <class T> struct C {
+  T a;
----------------
tra wrote:
> yaxunl wrote:
> > tra wrote:
> > > Do we really need three identical templates? If they are needed to let 
> > > compiler emit multiple diagnostics, perhaps we could just add another 
> > > template parameter so we can get different instantiations.
> > the error is emitted on the default ctor of the template. If we do not use 
> > different templates, all errors are emitted on the same line, we cannot 
> > make sure some instantiations do not cause error and some instantiations 
> > should cause error.
> > 
> > Adding template parameter will not help, because the error will still be 
> > emitted to the same line.
> Having multiple errors attributed to the same source is OK. You can specify 
> expected count. E.g.
> `dev-error 2 {{something}}`. Single template appears to be sufficient 
> (https://godbolt.org/z/G3WvYD).
> 
> You'll have different note diags emitted for individual errors, so checking 
> them would both provide more info about that exactly the problem is and will 
> verify that they are reported in the correct locations. Right now you are 
> describing what/where triggers an error that as a comment. Letting compiler 
> verify that instead would be better, IMO.
> 
> 
Yes I can use note. will do.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D68753/new/

https://reviews.llvm.org/D68753



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