| // RUN: %clang_cc1 %s -verify -fsyntax-only -Wc++2a-compat -std=c++17 | |
| #define concept constexpr bool | |
| template<typename T> | |
| concept x = 0; | |
| #undef concept | |
| int concept = 0; // expected-warning {{'concept' is a keyword in C++2a}} | |
| int requires = 0; // expected-warning {{'requires' is a keyword in C++2a}} |