| // { dg-do compile { target c++2a } } | |
| template<typename T> | |
| concept Int = __is_same_as(T, int); | |
| template<typename> struct Foo; | |
| // Instantiation of default arguments happens at the point of | |
| // instantiation for the class. | |
| template<Int T = char> struct S1 { }; | |
| template<Int auto X = false> struct S2 { }; | |
| S1<> s1; // { dg-error "constraint failure" } | |
| S2<> s2; // { dg-error "placeholder constraints not satisfied" } |