[Bug c++/92271] New: for consistency, __is_same_as should be named __is_same

[richard-gccbugzilla at metafoo dot co.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92271

            Bug ID: 92271
           Summary: for consistency, __is_same_as should be named
                    __is_same
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: richard-gccbugzilla at metafoo dot co.uk
  Target Milestone: ---

The convention for type trait builtins adopted by essentially every C++
compiler vendor is to expose std::SOME_TRAIT<A, B, C>::value as __SOME_TRAIT(A,
B, C).

GCC violates this convention in one case: std::is_same<A, B>::value is exposed
as __is_same_as(A, B) rather than as __is_same(A, B).

For consistency and code portability, I suggest that GCC accepts __is_same as a
synonym for __is_same_as. (FWIW, Clang uses the name __is_same here, but will
soon accept __is_same_as for GCC compatibility.)