[Bug c++/70413] Class template names in anonymous namespaces are not globally unique

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70413

--- Comment #8 from GCC 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:7226f825db049517b64442a40a6387513febb8f9

commit r14-6789-g7226f825db049517b64442a40a6387513febb8f9
Author: Patrick Palka <ppalka@redhat.com>
Date:   Thu Dec 21 13:53:43 2023 -0500

    c++: visibility wrt template and ptrmem targs [PR70413]

    When constraining the visibility of an instantiation, we weren't
    properly considering the visibility of PTRMEM_CST and TEMPLATE_DECL
    template arguments.

    This patch fixes this.  It turns out we don't maintain the relevant
    visibility flags for alias templates (e.g. TREE_PUBLIC is never set),
    so continue to ignore alias template template arguments for now.

            PR c++/70413
            PR c++/107906

    gcc/cp/ChangeLog:

            * decl2.cc (min_vis_expr_r): Handle PTRMEM_CST and TEMPLATE_DECL
            other than those for alias templates.

    gcc/testsuite/ChangeLog:

            * g++.dg/template/linkage2.C: New test.
            * g++.dg/template/linkage3.C: New test.
            * g++.dg/template/linkage4.C: New test.
            * g++.dg/template/linkage4a.C: New test.