1 // RUN: %clang_cc1 %s -verify -fsyntax-only -Wc++20-compat -std=c++17 2 3 #define concept constexpr bool 4 template<typename T> 5 concept x = 0; 6 #undef concept 7 8 int co_await = 0; // expected-warning {{'co_await' is a keyword in C++20}} 9 int co_return = 0; // expected-warning {{'co_return' is a keyword in C++20}} 10 int co_yield = 0; // expected-warning {{'co_yield' is a keyword in C++20}} 11 int char8_t = 0; // expected-warning {{'char8_t' is a keyword in C++20}} 12 int concept = 0; // expected-warning {{'concept' is a keyword in C++20}} 13 int requires = 0; // expected-warning {{'requires' is a keyword in C++20}} 14 int consteval = 0; // expected-warning {{'consteval' is a keyword in C++20}} 15 int constinit = 0; // expected-warning {{'constinit' is a keyword in C++20}} 16