| // RUN: %clang_cc1 -std=c++20 -fsyntax-only -verify %s | |
| // expected-no-diagnostics | |
| template<typename T> concept C = true; | |
| struct A { | |
| template<C T> void f(); | |
| }; | |
| auto L = []<C T>{}; | |
| template<typename X> | |
| class Friends { | |
| template<C T> friend void A::f(); | |
| template<C T> friend void decltype(L)::operator()(); | |
| }; |