3cfa32a71e
C++20 deprecated ATOMIC_FLAG_INIT thinking it was deprecated in C when it wasn't. It is expected to be undeprecated in C++23 as part of LWG3659 (https://wg21.link/LWG3659), which is currently Tentatively Ready. This handles the case where the user includes <stdatomic.h> in C++ code in a freestanding compile mode. The corollary libc++ changes are in 1544d1f9fdb115782202d72ad200c3f93b2c4f5a.
18 lines
861 B
C
18 lines
861 B
C
// RUN: %clang_cc1 -fsyntax-only -std=c11 %s -verify=okay
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// RUN: %clang_cc1 -fsyntax-only -std=c17 %s -verify
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// RUN: %clang_cc1 -fsyntax-only -std=c++11 -x c++ %s -verify=okay
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// RUN: %clang_cc1 -fsyntax-only -std=c++20 -x c++ %s -verify=cxx,expected
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// RUN: %clang_cc1 -fsyntax-only -std=c++20 -x c++ %s -verify=okay -D_CLANG_DISABLE_CRT_DEPRECATION_WARNINGS
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// RUN: %clang_cc1 -fsyntax-only -std=c17 %s -verify=okay -D_CLANG_DISABLE_CRT_DEPRECATION_WARNINGS
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//
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// okay-no-diagnostics
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#include <stdatomic.h>
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void func(void) {
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_Atomic int i = ATOMIC_VAR_INIT(12); // expected-warning {{macro 'ATOMIC_VAR_INIT' has been marked as deprecated}} \
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// expected-note@stdatomic.h:* {{macro marked 'deprecated' here}}
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#if defined(ATOMIC_FLAG_INIT) // Ok, deprecated in C++20, undeprecated in C++23 via LWG4659.
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#endif
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}
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