| // RUN: %clang_cc1 -fsyntax-only %s --std=c++17 -verify |
| // This is a reduction of GH57370 and GH58028, originally appearing |
| // in libstdc++'s variant code. |
| |
| struct V1 {}; |
| struct V2 : V1 { |
| int &a; |
| }; |
| |
| template <class T> using void_t = void; |
| |
| template <class T> struct X { T x; }; |
| |
| template <class T1, class T2, class = void> struct Variant { |
| Variant() = delete; // expected-note {{deleted here}} |
| }; |
| |
| template <class T1, class T2> |
| struct Variant<T1, T2, void_t<decltype(X<T2>{T1()})>> {}; |
| |
| void f() { |
| Variant<V1, V1>(); |
| Variant<V1, V2>(); // expected-error {{call to deleted constructor}} |
| } |
