b8266f512a
The original proposal was seen in Apr 2019 and we accidentally used that date (201904L) as the feature testing value. However, WG14 N2408 was adopted at the Oct 2019 meeting and so that's the correct date for the feature testing macro. The committee draft for C2x shows 201910L for this value, so this changes brings us in line with the standard.
78 lines
1.6 KiB
C
78 lines
1.6 KiB
C
// RUN: %clang_cc1 -fdouble-square-bracket-attributes -std=c11 -E -P %s -o - | FileCheck %s
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// RUN: %clang_cc1 -std=c2x -E -P %s -o - | FileCheck %s
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#define C2x(x) x: __has_c_attribute(x)
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// CHECK: fallthrough: 201910L
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C2x(fallthrough)
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// CHECK: __nodiscard__: 202003L
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C2x(__nodiscard__)
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// CHECK: selectany: 0
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C2x(selectany); // Known attribute not supported in C mode
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// CHECK: frobble: 0
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C2x(frobble) // Unknown attribute
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// CHECK: frobble::frobble: 0
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C2x(frobble::frobble) // Unknown vendor namespace
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// CHECK: clang::annotate: 1
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C2x(clang::annotate)
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// CHECK: deprecated: 201904L
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C2x(deprecated)
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// CHECK: maybe_unused: 202106L
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C2x(maybe_unused)
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// CHECK: __gnu__::warn_unused_result: 202003L
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C2x(__gnu__::warn_unused_result)
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// CHECK: gnu::__warn_unused_result__: 202003L
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C2x(gnu::__warn_unused_result__)
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// Test that macro expansion of the builtin argument works.
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#define C clang
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#define L likely
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#define CL clang::likely
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#define N nodiscard
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#if __has_c_attribute(N)
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int has_nodiscard;
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#endif
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// CHECK: int has_nodiscard;
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#if __has_c_attribute(C::L)
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int has_clang_likely_1;
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#endif
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// CHECK: int has_clang_likely_1;
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#if __has_c_attribute(clang::L)
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int has_clang_likely_2;
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#endif
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// CHECK: int has_clang_likely_2;
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#if __has_c_attribute(C::likely)
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int has_clang_likely_3;
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#endif
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// CHECK: int has_clang_likely_3;
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#if __has_c_attribute(CL)
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int has_clang_likely_4;
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#endif
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// CHECK: int has_clang_likely_4;
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#define FUNCLIKE1(x) clang::x
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#if __has_c_attribute(FUNCLIKE1(likely))
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int funclike_1;
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#endif
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// CHECK: int funclike_1;
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#define FUNCLIKE2(x) _Clang::x
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#if __has_c_attribute(FUNCLIKE2(likely))
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int funclike_2;
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#endif
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// CHECK: int funclike_2;
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