[Bug c++/93810] New: missing -Wmismatched-tags on a typedef of an implicit class template specialization

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93810

            Bug ID: 93810
           Summary: missing -Wmismatched-tags on a typedef of an implicit
                    class template specialization
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: msebor at gcc dot gnu.org
  Target Milestone: ---

The typedef below should be diagnosed by -Wmismatched-tags but isn't.  Both
Clang and Visual C++ diagnose it as expected.

$ cat t.C && gcc -S -Wmismatched-tags -Wredundant-tags t.C
template <int> class C { };

typedef struct C<0> C0;   // missing -Wmismatched-tags