clang/test/Preprocessor/has_c_attribute.c

   1 // RUN: %clang_cc1 -std=c11 -E -P %s -o - | FileCheck %s
   2 // RUN: %clang_cc1 -std=c2x -E -P %s -o - | FileCheck %s
   3
   4 #define C2x(x) x: __has_c_attribute(x)
   5
   6 // CHECK: fallthrough: 201910L
   7 C2x(fallthrough)
   8
   9 // CHECK: __nodiscard__: 202003L
  10 C2x(__nodiscard__)
  11
  12 // CHECK: warn_unused_result: 0
  13 C2x(warn_unused_result)
  14
  15 // CHECK: gnu::warn_unused_result: 1
  16 C2x(gnu::warn_unused_result)
  17
  18 // CHECK: clang::warn_unused_result: 0
  19 C2x(clang::warn_unused_result)
  20
  21 // CHECK: selectany: 0
  22 C2x(selectany); // Known attribute not supported in C mode
  23
  24 // CHECK: frobble: 0
  25 C2x(frobble) // Unknown attribute
  26
  27 // CHECK: frobble::frobble: 0
  28 C2x(frobble::frobble) // Unknown vendor namespace
  29
  30 // CHECK: clang::annotate: 1
  31 C2x(clang::annotate)
  32
  33 // CHECK: deprecated: 201904L
  34 C2x(deprecated)
  35
  36 // CHECK: maybe_unused: 202106L
  37 C2x(maybe_unused)
  38
  39 // CHECK: __gnu__::warn_unused_result: 1
  40 C2x(__gnu__::warn_unused_result)
  41
  42 // CHECK: gnu::__warn_unused_result__: 1
  43 C2x(gnu::__warn_unused_result__)
  44
  45 // Test that macro expansion of the builtin argument works.
  46 #define C clang
  47 #define L likely
  48 #define CL clang::likely
  49 #define N nodiscard
  50
  51 #if __has_c_attribute(N)
  52 int has_nodiscard;
  53 #endif
  54 // CHECK: int has_nodiscard;
  55
  56 #if __has_c_attribute(C::L)
  57 int has_clang_likely_1;
  58 #endif
  59 // CHECK: int has_clang_likely_1;
  60
  61 #if __has_c_attribute(clang::L)
  62 int has_clang_likely_2;
  63 #endif
  64 // CHECK: int has_clang_likely_2;
  65
  66 #if __has_c_attribute(C::likely)
  67 int has_clang_likely_3;
  68 #endif
  69 // CHECK: int has_clang_likely_3;
  70
  71 #if __has_c_attribute(CL)
  72 int has_clang_likely_4;
  73 #endif
  74 // CHECK: int has_clang_likely_4;
  75
  76 #define FUNCLIKE1(x) clang::x
  77 #if __has_c_attribute(FUNCLIKE1(likely))
  78 int funclike_1;
  79 #endif
  80 // CHECK: int funclike_1;
  81
  82 #define FUNCLIKE2(x) _Clang::x
  83 #if __has_c_attribute(FUNCLIKE2(likely))
  84 int funclike_2;
  85 #endif
  86 // CHECK: int funclike_2;