c++: corresponding object parms [PR113191]
As discussed, our handling of corresponding object parameters needed to
handle the using-declaration case better. And I took the opportunity to
share code between the add_method and cand_parms_match uses.
This patch specifically doesn't compare reversed parameters, but a follow-up
patch will.
PR c++/113191
gcc/cp/ChangeLog:
* class.cc (xobj_iobj_parameters_correspond): Add context parm.
(object_parms_correspond): Factor out of...
(add_method): ...here.
* method.cc (defaulted_late_check): Use it.
* call.cc (class_of_implicit_object): New.
(object_parms_correspond): Overload taking two candidates.
(cand_parms_match): Use it.
(joust): Check reversed before comparing constraints.
* cp-tree.h (object_parms_correspond): Declare.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/concepts-memfun4.C: New test.