| // { dg-do compile { target c++17_down } } | |
| // { dg-options "-Wc++20-compat" } | |
| // Validate suppression of -Wc++20-compat diagnostics. | |
| #pragma GCC diagnostic ignored "-Wc++20-compat" | |
| int constinit; | |
| int consteval; | |
| int requires; | |
| int concept; | |
| int co_await; | |
| int co_yield; | |
| int co_return; | |
| int char8_t; |