[Bug c++/110687] New: problem with class template

[Bug c++/110687] New: problem with class template

[irip at qq dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110687

            Bug ID: 110687
           Summary: problem with class template
           Product: gcc
           Version: 4.8.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: irip at qq dot com
  Target Milestone: ---

Testcase as:

namespace N {
    template <class P> struct S01 {
        template <int I> struct T {};
        N::S01<P>::template T<1> m;
    };
}

Compiler error:
'T<1>' in 'struct N::S01<P>' does not name a type

The C++ standard allows you to declare a class template without adding typename
when referring to a previously defined type

[Bug c++/110687] problem with class template

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110687

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |11.4.0
      Known to fail|                            |10.5.0, 11.3.0
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 11 accepts this and is the oldest still supported compiler.  Likely a
duplicate of an existing (fixed) bug.

[Bug c++/110687] problem with class template

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110687

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 12.1 and 11.4 by:

    c++: template-id with current inst qualifier [PR102300]

    The patch for PR41723 properly changed one place to look into the current
    instantiation; now we need to fix this place as well.

            PR c++/102300

    gcc/cp/ChangeLog:

            * parser.cc (cp_parser_template_name): Use dependent_scope_p.

Probably a dup of PR 41723.