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llvm-project/clang/test/Preprocessor/has_c_attribute.c

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Correct line endings that got mixed up in r320088; NFC. llvm-svn: 320115
2017-12-08 07:10:09 +08:00
// RUN: %clang_cc1 -fdouble-square-bracket-attributes -std=c11 -E %s -o - | FileCheck %s
Disallow use of __has_c_attribute in C++ mode. __has_cpp_attribute is not available in C mode, and __has_c_attribute should not be available in C++ mode. This also adds a test to demonstrate that we properly handle scoped attribute tokens even in C mode.
2019-11-26 06:32:07 +08:00
// RUN: %clang_cc1 -std=c2x -E %s -o - | FileCheck %s
Correct line endings that got mixed up in r320088; NFC. llvm-svn: 320115
2017-12-08 07:10:09 +08:00
// CHECK: has_fallthrough
#if __has_c_attribute(fallthrough)
int has_fallthrough();
#endif
// CHECK: does_not_have_selectany
#if !__has_c_attribute(selectany)
int does_not_have_selectany();
#endif
Allow standards-based attributes to have leading and trailing underscores. This gives library implementers a way to use standards-based attributes that do not conflict with user-defined macros of the same name. Attributes in C2x require this behavior normatively (C2x 6.7.11p4), but there's no reason to not have the same behavior in C++, especially given that such attributes may be used by a C library consumed by a C++ compilation. llvm-svn: 369033
2019-08-16 02:35:44 +08:00
// CHECK: has_nodiscard_underscore
#if __has_c_attribute(__nodiscard__)
int has_nodiscard_underscore();
#endif
Disallow use of __has_c_attribute in C++ mode. __has_cpp_attribute is not available in C mode, and __has_c_attribute should not be available in C++ mode. This also adds a test to demonstrate that we properly handle scoped attribute tokens even in C mode.
2019-11-26 06:32:07 +08:00
// CHECK: has_clang_annotate
#if __has_c_attribute(clang::annotate)
int has_clang_annotate();
#endif