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Subject: [Bug c++/98486] Variable template specialization doesn't account for
 primary's constraints
Date: Thu, 16 Sep 2021 19:04:24 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98486

--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Patrick Palka <ppalka@gcc.gnu.org>:

https://gcc.gnu.org/g:2e2e65a46d2674bed53afd211493876ee2b79453

commit r12-3585-g2e2e65a46d2674bed53afd211493876ee2b79453
Author: Patrick Palka <ppalka@redhat.com>
Date:   Thu Sep 16 15:03:55 2021 -0400

    c++: constrained variable template issues [PR98486]

    This fixes some issues with constrained variable templates:

      - Constraints aren't checked when explicitly specializing a variable
        template.
      - Constraints aren't attached to a static data member template at
        parse time.
      - Constraints don't get propagated when (partially) instantiating a
        static data member template, so we need to make sure to look up
        constraints using the most general template during satisfaction.

            PR c++/98486

    gcc/cp/ChangeLog:

            * constraint.cc (get_normalized_constraints_from_decl): Always
            look up constraints using the most general template.
            * decl.c (grokdeclarator): Set constraints on a static data
            member template.
            * pt.c (determine_specialization): Check constraints on a
            variable template.

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp2a/concepts-var-templ1.C: New test.
            * g++.dg/cpp2a/concepts-var-templ1a.C: New test.
            * g++.dg/cpp2a/concepts-var-templ1b.C: New test.=