+2016-02-03 Patrick Palka <ppalka@gcc.gnu.org>
+
+ PR c++/69056
+ * pt.c (try_one_overload): Handle comparing argument packs so
+ that there is no conflict if we deduced more arguments of an
+ argument pack than were explicitly specified.
+
2016-01-31 Jakub Jelinek <jakub@redhat.com>
Jason Merrill <jason@redhat.com>
template args used in the function parm list with our own
template parms. Discard them. */
TREE_VEC_ELT (tempargs, i) = NULL_TREE;
+ else if (oldelt && ARGUMENT_PACK_P (oldelt))
+ {
+ /* Check that the argument at each index of the deduced argument pack
+ is equivalent to the corresponding explicitly specified argument.
+ We may have deduced more arguments than were explicitly specified,
+ and that's OK. */
+ gcc_assert (ARGUMENT_PACK_INCOMPLETE_P (oldelt));
+ gcc_assert (ARGUMENT_PACK_ARGS (oldelt)
+ == ARGUMENT_PACK_EXPLICIT_ARGS (oldelt));
+
+ tree explicit_pack = ARGUMENT_PACK_ARGS (oldelt);
+ tree deduced_pack = ARGUMENT_PACK_ARGS (elt);
+
+ if (TREE_VEC_LENGTH (deduced_pack)
+ < TREE_VEC_LENGTH (explicit_pack))
+ return 0;
+
+ for (int j = 0; j < TREE_VEC_LENGTH (explicit_pack); j++)
+ if (!template_args_equal (TREE_VEC_ELT (explicit_pack, j),
+ TREE_VEC_ELT (deduced_pack, j)))
+ return 0;
+ }
else if (oldelt && !template_args_equal (oldelt, elt))
return 0;
}
+2016-02-03 Patrick Palka <ppalka@gcc.gnu.org>
+
+ PR c++/69056
+ g++.dg/cpp0x/pr69056.C: New test.
+
2016-02-03 Vladimir Makarov <vmakarov@redhat.com>
Alexandre Oliva <aoliva@redhat.com>
--- /dev/null
+// { dg-do compile { target c++11 } }
+// PR c++/69056
+
+template <typename T, typename... Args>
+void resolver(int (*) (T, Args...));
+
+int funcA(int, float) { return 0; }
+int funcA(double) { return 0; }
+
+int funcB(int, float, char) { return 0; }
+int funcB(int, bool) { return 0; }
+int funcB(double) { return 0; }
+
+int funcC(int) { return 0; }
+int funcC(double) { return 0; }
+
+void
+foo (void)
+{
+ resolver (&funcA); // { dg-error "no match" }
+ resolver<int> (&funcA);
+ resolver<double> (&funcA);
+
+ resolver<int> (&funcB); // { dg-error "no match" }
+ resolver<int, char> (&funcB); // { dg-error "no match" }
+ resolver<int, float> (&funcB);
+
+ resolver<int> (&funcC);
+ resolver<int, float> (&funcC); // { dg-error "no match" }
+}