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150
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1 // RUN: %clang_cc1 -fsyntax-only -fdouble-square-bracket-attributes -verify %s
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2 // RUN: %clang_cc1 -fsyntax-only -std=gnu2x -verify %s
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3
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4 enum [[]] E {
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5 One [[]],
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6 Two,
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7 Three [[]]
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8 };
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9
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10 enum [[]] { Four };
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11 [[]] enum E2 { Five }; // expected-error {{misplaced attributes}}
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12
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13 // FIXME: this diagnostic can be improved.
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14 enum { [[]] Six }; // expected-error {{expected identifier}}
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15
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16 // FIXME: this diagnostic can be improved.
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17 enum E3 [[]] { Seven }; // expected-error {{expected identifier or '('}}
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18
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19 struct [[]] S1 {
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20 int i [[]];
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21 int [[]] j;
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22 int k[10] [[]];
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23 int l[[]][10];
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24 [[]] int m, n;
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25 int o [[]] : 12;
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26 };
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27
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28 [[]] struct S2 { int a; }; // expected-error {{misplaced attributes}}
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29 struct S3 [[]] { int a; }; // expected-error {{an attribute list cannot appear here}}
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30
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31 union [[]] U {
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32 double d [[]];
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33 [[]] int i;
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34 };
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35
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36 [[]] union U2 { double d; }; // expected-error {{misplaced attributes}}
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37 union U3 [[]] { double d; }; // expected-error {{an attribute list cannot appear here}}
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38
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39 struct [[]] IncompleteStruct;
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40 union [[]] IncompleteUnion;
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41 enum [[]] IncompleteEnum;
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42 enum __attribute__((deprecated)) IncompleteEnum2;
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43
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44 [[]] void f1(void);
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45 void [[]] f2(void);
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46 void f3 [[]] (void);
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47 void f4(void) [[]];
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48
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49 void f5(int i [[]], [[]] int j, int [[]] k);
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50
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51 void f6(a, b) [[]] int a; int b; { // expected-error {{an attribute list cannot appear here}}
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52 }
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53
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54 // FIXME: technically, an attribute list cannot appear here, but we currently
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55 // parse it as part of the return type of the function, which is reasonable
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56 // behavior given that we *don't* want to parse it as part of the K&R parameter
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57 // declarations. It is disallowed to avoid a parsing ambiguity we already
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58 // handle well.
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59 int (*f7(a, b))(int, int) [[]] int a; int b; {
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60 return 0;
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61 }
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62
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63 [[]] int a, b;
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64 int c [[]], d [[]];
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65
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66 void f8(void) [[]] {
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67 [[]] int i, j;
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68 int k, l [[]];
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69 }
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70
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71 [[]] void f9(void) {
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72 int i[10] [[]];
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73 int (*fp1)(void)[[]];
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74 int (*fp2 [[]])(void);
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75
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76 int * [[]] *ipp;
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77 }
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78
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79 void f10(int j[static 10] [[]], int k[*] [[]]);
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80
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81 void f11(void) {
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82 [[]] {}
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83 [[]] if (1) {}
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84
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85 [[]] switch (1) {
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86 [[]] case 1: [[]] break;
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87 [[]] default: break;
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88 }
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89
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90 goto foo;
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91 [[]] foo: (void)1;
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92
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93 [[]] for (;;);
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94 [[]] while (1);
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95 [[]] do [[]] { } while(1);
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96
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97 [[]] (void)1;
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98
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99 [[]];
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100
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101 (void)sizeof(int [4][[]]);
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102 (void)sizeof(struct [[]] S3 { int a [[]]; });
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103
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104 [[]] return;
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105 }
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106
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107 [[attr]] void f12(void); // expected-warning {{unknown attribute 'attr' ignored}}
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108 [[vendor::attr]] void f13(void); // expected-warning {{unknown attribute 'attr' ignored}}
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109
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110 // Ensure that asm statements properly handle double colons.
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111 void test_asm(void) {
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112 asm("ret" :::);
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113 asm("foo" :: "r" (xx)); // expected-error {{use of undeclared identifier 'xx'}}
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114 }
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115
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116 // Do not allow 'using' to introduce vendor attribute namespaces.
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117 [[using vendor: attr1, attr2]] void f14(void); // expected-error {{expected ']'}} \
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118 // expected-warning {{unknown attribute 'vendor' ignored}} \
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119 // expected-warning {{unknown attribute 'using' ignored}}
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120
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121 struct [[]] S4 *s; // expected-error {{an attribute list cannot appear here}}
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122 struct S5 {};
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123 int c = sizeof(struct [[]] S5); // expected-error {{an attribute list cannot appear here}}
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