| // { dg-do compile { target c++11 } } |
| // { dg-options "-fconcepts" } |
| |
| template <typename T> |
| void foo1(T& t) { |
| typename T::template C<void> tcv = t; |
| typename T::template C<auto> u = tcv; // { dg-error "not permitted" "" { target c++20 } } |
| T::template C<auto>::f (tcv, u); // { dg-error "incomplete|not permitted" } |
| (typename T::template D<auto> (t)); // { dg-error "invalid|not permitted" } |
| } |
| |
| struct T1 { |
| template <typename T> struct C { |
| C(T1&); |
| static void f(T1&, C&); |
| }; |
| template <typename T> struct D { |
| D(T1&); |
| }; |
| }; |
| |
| template <typename T> |
| void foo2(T& t) { |
| typename T::template C<void> tcv = t; |
| typename T::template C<auto> u = tcv; // { dg-error "not permitted" "" { target c++20 } } |
| T::template C<auto>::f (tcv, u); // { dg-error "incomplete|not permitted" } |
| T::template D<auto> (t); // { dg-error "invalid|not permitted" } |
| } |
| |
| struct T2 { |
| template <typename T> struct C { |
| C(T2&); |
| static void f(T2&, C&); |
| }; |
| template <typename T> static void D(T2&); |
| }; |
| |
| void f(T1& t1, T2& t2) { |
| foo1 (t1); |
| foo2 (t2); |
| } |
