clang/test/Preprocessor/has_attribute.cpp

   1 // RUN: %clang_cc1 -triple i386-unknown-unknown -fms-compatibility -std=c++11 -E -P %s -o - | FileCheck %s --check-prefixes=CHECK,ITANIUM --implicit-check-not=:
   2 // RUN: %clang_cc1 -triple i386-windows -fms-compatibility -std=c++11 -E -P %s -o - | FileCheck %s --check-prefixes=CHECK,WINDOWS --implicit-check-not=:
   3
   4 #define CXX11(x) x: __has_cpp_attribute(x)
   5
   6 // CHECK: clang::fallthrough: 1
   7 CXX11(clang::fallthrough)
   8
   9 // CHECK: selectany: 0
  10 CXX11(selectany)
  11
  12 // The attribute name can be bracketed with double underscores.
  13 // CHECK: clang::__fallthrough__: 1
  14 CXX11(clang::__fallthrough__)
  15
  16 // The scope cannot be bracketed with double underscores unless it is
  17 // for gnu or clang.
  18 // CHECK: __gsl__::suppress: 0
  19 CXX11(__gsl__::suppress)
  20
  21 // CHECK: _Clang::fallthrough: 1
  22 CXX11(_Clang::fallthrough)
  23
  24 // CHECK: __nodiscard__: 201907L
  25 CXX11(__nodiscard__)
  26
  27 // CHECK: warn_unused_result: 0
  28 CXX11(warn_unused_result)
  29
  30 // CHECK: gnu::warn_unused_result: 1
  31 CXX11(gnu::warn_unused_result)
  32
  33 // CHECK: clang::warn_unused_result: 1
  34 CXX11(clang::warn_unused_result)
  35
  36 // CHECK: __gnu__::__const__: 1
  37 CXX11(__gnu__::__const__)
  38
  39 // Test that C++11, target-specific attributes behave properly.
  40
  41 // CHECK: gnu::mips16: 0
  42 CXX11(gnu::mips16)
  43
  44 // Test for standard attributes as listed in C++2a [cpp.cond] paragraph 6.
  45
  46 CXX11(assert)
  47 CXX11(carries_dependency)
  48 CXX11(deprecated)
  49 CXX11(ensures)
  50 CXX11(expects)
  51 CXX11(fallthrough)
  52 CXX11(likely)
  53 CXX11(maybe_unused)
  54 CXX11(no_unique_address)
  55 CXX11(msvc::no_unique_address)
  56 CXX11(nodiscard)
  57 CXX11(noreturn)
  58 CXX11(unlikely)
  59 // FIXME(201806L) CHECK: assert: 0
  60 // CHECK: carries_dependency: 200809L
  61 // CHECK: deprecated: 201309L
  62 // FIXME(201806L) CHECK: ensures: 0
  63 // FIXME(201806L) CHECK: expects: 0
  64 // CHECK: fallthrough: 201603L
  65 // CHECK: likely: 201803L
  66 // CHECK: maybe_unused: 201603L
  67 // ITANIUM: no_unique_address: 201803L
  68 // WINDOWS: no_unique_address: 0
  69 // ITANIUM: msvc::no_unique_address: 0
  70 // WINDOWS: msvc::no_unique_address: 201803L
  71 // CHECK: nodiscard: 201907L
  72 // CHECK: noreturn: 200809L
  73 // CHECK: unlikely: 201803L
  74
  75 namespace PR48462 {
  76 // Test that macro expansion of the builtin argument works.
  77 #define C clang
  78 #define F fallthrough
  79 #define CF clang::fallthrough
  80
  81 #if __has_cpp_attribute(F)
  82 int has_fallthrough;
  83 #endif
  84 // CHECK: int has_fallthrough;
  85
  86 #if __has_cpp_attribute(C::F)
  87 int has_clang_falthrough_1;
  88 #endif
  89 // CHECK: int has_clang_falthrough_1;
  90
  91 #if __has_cpp_attribute(clang::F)
  92 int has_clang_falthrough_2;
  93 #endif
  94 // CHECK: int has_clang_falthrough_2;
  95
  96 #if __has_cpp_attribute(C::fallthrough)
  97 int has_clang_falthrough_3;
  98 #endif
  99 // CHECK: int has_clang_falthrough_3;
 100
 101 #if __has_cpp_attribute(CF)
 102 int has_clang_falthrough_4;
 103 #endif
 104 // CHECK: int has_clang_falthrough_4;
 105
 106 #define FUNCLIKE1(x) clang::x
 107 #if __has_cpp_attribute(FUNCLIKE1(fallthrough))
 108 int funclike_1;
 109 #endif
 110 // CHECK: int funclike_1;
 111
 112 #define FUNCLIKE2(x) _Clang::x
 113 #if __has_cpp_attribute(FUNCLIKE2(fallthrough))
 114 int funclike_2;
 115 #endif
 116 // CHECK: int funclike_2;
 117 }
 118
 119 // Test for Microsoft __declspec attributes
 120
 121 #define DECLSPEC(x) x: __has_declspec_attribute(x)
 122
 123 // CHECK: uuid: 1
 124 // CHECK: __uuid__: 1
 125 DECLSPEC(uuid)
 126 DECLSPEC(__uuid__)
 127
 128 // CHECK: fallthrough: 0
 129 DECLSPEC(fallthrough)
 130
 131 namespace PR48462 {
 132 // Test that macro expansion of the builtin argument works.
 133 #define U uuid
 134
 135 #if __has_declspec_attribute(U)
 136 int has_uuid;
 137 #endif
 138 // CHECK: int has_uuid;
 139 }