[Bug c++/92847] [C++20] ambiguous overload for ‘operator==’ ?

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92847

--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Tue Dec 10 20:12:50 2019
New Revision: 279185

URL: https://gcc.gnu.org/viewcvs?rev=279185&root=gcc&view=rev
Log:
        PR c++/92847 - C++20 comparison ambiguity with class template.

This testcase demonstrates that looking at cand->template_decl is not a good
starting place for finding the most general template, as it is only set for
primary templates.

        * call.c (cand_parms_match): Handle all templated functions.

Added:
    trunk/gcc/testsuite/g++.dg/cpp2a/spaceship-rewrite5.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/call.c