Here we're triggering an overzealous assert in unify during partial
ordering since the member function pointer constants are represented as
ordinary CONSTRUCTORs (with TYPE_PTRMEMFUNC_P TREE_TYPE) but the assert
expects COMPOUND_LITERAL_P constructors.
PR c++/108104
gcc/cp/ChangeLog:
* pt.cc (unify) <default>: Relax assert to accept any
CONSTRUCTOR parm, not just COMPOUND_LITERAL_P one.
gcc/testsuite/ChangeLog:
* g++.dg/template/ptrmem33.C: New test.
if (is_overloaded_fn (parm) || type_unknown_p (parm))
return unify_success (explain_p);
gcc_assert (EXPR_P (parm)
- || COMPOUND_LITERAL_P (parm)
+ || TREE_CODE (parm) == CONSTRUCTOR
|| TREE_CODE (parm) == TRAIT_EXPR);
expr:
/* We must be looking at an expression. This can happen with
--- /dev/null
+// PR c++/108104
+// { dg-do compile { target c++11 } }
+
+struct A {
+ void x();
+ void y();
+};
+
+enum State { On };
+
+template<State state, void (A::*)()>
+struct B {
+ static void f();
+};
+
+template<State state>
+struct B<state, nullptr> {
+ static void g();
+};
+
+template<State state>
+struct B<state, &A::y> {
+ static void h();
+};
+
+int main() {
+ B<State::On, &A::x>::f();
+ B<State::On, nullptr>::g();
+ B<State::On, &A::y>::h();
+}