1 // { dg-do compile { target c++11 } }
2 // { dg-options "-fconcepts" }
3 
4 // This is like pr84979-2.C, except that we swap the types passed to
5 // the template functions foo1 and foo2, so that the expectations WRT
6 // D's typeness are not met.
7 
8 template <typename T>
foo1(T & t)9 void foo1(T& t) {
10   typename T::template C<void> tcv = t;
11   typename T::template C<auto> u = tcv;
12   T::template C<auto>::f (tcv, u); // { dg-error "incomplete" }
13   (typename T::template D<auto> (t)); // { dg-error "invalid" }
14 }
15 
16 struct T1 {
17   template <typename T> struct C {
18     C(T1&);
19     static void f(T1&, C&);
20   };
21   template <typename T> struct D {
22     D(T1&);
23   };
24 };
25 
26 template <typename T>
foo2(T & t)27 void foo2(T& t) {
28   typename T::template C<void> tcv = t;
29   typename T::template C<auto> u = tcv;
30   T::template C<auto>::f (tcv, u); // { dg-error "incomplete" }
31   T::template D<auto> (t); // { dg-error "yields a type" }
32 }
33 
34 struct T2 {
35   template <typename T> struct C {
36     C(T2&);
37     static void f(T2&, C&);
38   };
39   template <typename T> static void D(T2&);
40 };
41 
f(T1 & t1,T2 & t2)42 void f(T1& t1, T2& t2) {
43   foo1 (t2);
44   foo2 (t1);
45 }
46