[Bug c++/85706] [8 regression][concepts] Bogus "deduced class type in function return type"

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85706

--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed May  9 02:08:52 2018
New Revision: 260066

URL: https://gcc.gnu.org/viewcvs?rev=260066&root=gcc&view=rev
Log:
        PR c++/85706 - class deduction under decltype

        * pt.c (for_each_template_parm_r): Handle DECLTYPE_TYPE.  Clear
        *walk_subtrees whether or not we walked into the operand.
        (type_uses_auto): Only look at deduced contexts.

Added:
    trunk/gcc/testsuite/g++.dg/concepts/class-deduction2.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/pt.c