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// { 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;