This testcase demonstrates that the issue in PR105623 is not limited to templates, so we should do the marking in a less template-specific place.
Tested x86_64-pc-linux-gnu, applying to trunk. PR c++/105779 gcc/cp/ChangeLog: * call.cc (resolve_args): Call mark_single_function here. * pt.cc (unify_one_argument): Not here. gcc/testsuite/ChangeLog: * g++.dg/cpp1y/auto-fn63.C: New test. --- gcc/cp/call.cc | 5 +++++ gcc/cp/pt.cc | 4 ---- gcc/testsuite/g++.dg/cpp1y/auto-fn63.C | 12 ++++++++++++ 3 files changed, 17 insertions(+), 4 deletions(-) create mode 100644 gcc/testsuite/g++.dg/cpp1y/auto-fn63.C diff --git a/gcc/cp/call.cc b/gcc/cp/call.cc index 85fe9b5ab85..4710c3777c5 100644 --- a/gcc/cp/call.cc +++ b/gcc/cp/call.cc @@ -4672,6 +4672,11 @@ resolve_args (vec<tree, va_gc> *args, tsubst_flags_t complain) } else if (invalid_nonstatic_memfn_p (EXPR_LOCATION (arg), arg, complain)) return NULL; + + /* Force auto deduction now. Omit tf_warning to avoid redundant + deprecated warning on deprecated-14.C. */ + if (!mark_single_function (arg, tf_error)) + return NULL; } return args; } diff --git a/gcc/cp/pt.cc b/gcc/cp/pt.cc index 4f0ace2644b..6de8e496859 100644 --- a/gcc/cp/pt.cc +++ b/gcc/cp/pt.cc @@ -22624,10 +22624,6 @@ unify_one_argument (tree tparms, tree targs, tree parm, tree arg, return unify_success (explain_p); } - /* Force auto deduction now. Use tf_none to avoid redundant - deprecated warning on deprecated-14.C. */ - mark_single_function (arg, tf_none); - arg_expr = arg; arg = unlowered_expr_type (arg); if (arg == error_mark_node) diff --git a/gcc/testsuite/g++.dg/cpp1y/auto-fn63.C b/gcc/testsuite/g++.dg/cpp1y/auto-fn63.C new file mode 100644 index 00000000000..ca3bc854065 --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp1y/auto-fn63.C @@ -0,0 +1,12 @@ +// PR c++/105779 +// { dg-do compile { target c++14 } } + +template<int> +struct struct1 +{ + static auto apply() { return 1; } +}; + +int method(int(*f)()); + +int t = method(struct1<1>::apply); base-commit: ae54c1b09963779c5c3914782324ff48af32e2f1 -- 2.27.0