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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/102156] [9/10/11/12 Regression] `cannot call constructor`
 error during member access
Date: Fri, 15 Apr 2022 04:36:08 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102156

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |INVALID
                 CC|                            |jason at gcc dot gnu.org
             Status|NEW                         |RESOLVED

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Why do you think that DR147 doesn't apply to this testcase?  We see B::B<, =
look
up B in B, and DR147 says we find the constructor.

The rule mentioned in PR11764, that lookup in a nested-name-specifier only
considers types and namespaces, doesn't apply here because the name B isn't
followed directly by ::.  The current draft even has an example to illustra=
te
this:

template<int> struct B : A {};
namespace N {
  template<int> void B();
  int f() {
    return B<0>::n;     // error: N=E2=80=8B::=E2=80=8BB<0> is not a type
  }
}

EDG also rejects this testcase.=