1 // { dg-do compile } 2 // Origin: Ivan Godard <igodard at pacbell dot net> 3 // PR c++/17447: Detect parameters of dependent types even in templates 4 5 struct B; // { dg-message "forward declaration" } 6 template<typename T> struct A { 7 8 friend A& operator <<(A& a, B b) { return a; } // { dg-error "incomplete" } 9 friend A& operator <<(A& a, T b) { return a; } 10 foo1A11 void foo1(B b) {} // { dg-error "incomplete" } foo1aA12 void foo1a(T b) {} 13 foo2A14 B foo2(void) {} // { dg-error "incomplete" } foo2aA15 T foo2a(void) {} 16 17 void foo3(B b); 18 }; 19