| 1 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++1y -triple x86_64-linux-gnu %s |
| 2 | |
| 3 | // If there is a preceding declaration of the entity *in the same scope* in |
| 4 | // which the bound was specified, an omitted array bound is taken to be the |
| 5 | // same as in that earlier declaration |
| 6 | |
| 7 | // rdar://13535367 |
| 8 | namespace test0 { |
| 9 | extern "C" int array[]; |
| 10 | void declare() { extern int array[100]; } |
| 11 | int value1 = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}} |
| 12 | extern "C" int array[]; |
| 13 | int value2 = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}} |
| 14 | } |
| 15 | |
| 16 | namespace test1 { |
| 17 | extern "C" int array[]; |
| 18 | void test() { |
| 19 | { extern int array[100]; } |
| 20 | extern int array[]; |
| 21 | int x = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}} |
| 22 | } |
| 23 | } |
| 24 | |
| 25 | namespace test2 { |
| 26 | void declare() { extern int array[100]; } |
| 27 | extern int array[]; |
| 28 | int value = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}} |
| 29 | } |
| 30 | |
| 31 | namespace test3 { |
| 32 | void test() { |
| 33 | { extern int array[100]; } |
| 34 | extern int array[]; |
| 35 | int x = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}} |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | namespace test4 { |
| 40 | extern int array[]; |
| 41 | void test() { |
| 42 | extern int array[100]; |
| 43 | int x = sizeof(array); |
| 44 | } |
| 45 | int y = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}} |
| 46 | } |
| 47 | |
| 48 | namespace test5 { |
| 49 | void test() { |
| 50 | extern int array[100]; |
| 51 | extern int array[]; |
| 52 | int x = sizeof(array); |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | namespace test6 { |
| 57 | void test() { |
| 58 | extern int array[100]; |
| 59 | { |
| 60 | extern int array[]; |
| 61 | int x = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}} |
| 62 | } |
| 63 | int y = sizeof(array); |
| 64 | extern int array[]; |
| 65 | int z = sizeof(array); |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | namespace test7 { |
| 70 | extern int array[100]; |
| 71 | void test() { |
| 72 | extern int array[]; |
| 73 | int x = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}} |
| 74 | } |
| 75 | int y = sizeof(array); |
| 76 | extern int array[]; |
| 77 | int z = sizeof(array); |
| 78 | } |
| 79 | |
| 80 | namespace test8 { |
| 81 | extern int array[]; |
| 82 | void test() { |
| 83 | extern int array[100]; |
| 84 | int x = sizeof(array); |
| 85 | } |
| 86 | int y = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}} |
| 87 | extern int array[]; |
| 88 | int z = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}} |
| 89 | } |
| 90 | |
| 91 | namespace dependent { |
| 92 | template<typename T> void f() { |
| 93 | extern int arr1[]; |
| 94 | extern T arr1; |
| 95 | extern T arr2; |
| 96 | extern int arr2[]; |
| 97 | static_assert(sizeof(arr1) == 12, ""); |
| 98 | static_assert(sizeof(arr2) == 12, ""); |
| 99 | |
| 100 | // Use a failing test to ensure the type isn't considered dependent. |
| 101 | static_assert(sizeof(arr2) == 13, ""); // expected-error {{failed}} |
| 102 | } |
| 103 | |
| 104 | void g() { f<int[3]>(); } // expected-note {{in instantiation of}} |
| 105 | |
| 106 | template<typename T> void h1() { |
| 107 | extern T arr3; |
| 108 | { |
| 109 | int arr3; |
| 110 | { |
| 111 | extern int arr3[]; |
| 112 | // Detected in template definition. |
| 113 | (void)sizeof(arr3); // expected-error {{incomplete}} |
| 114 | } |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | template<typename T> void h2() { |
| 119 | extern int arr4[3]; |
| 120 | { |
| 121 | int arr4; |
| 122 | { |
| 123 | extern T arr4; |
| 124 | // Detected in template instantiation. |
| 125 | (void)sizeof(arr4); // expected-error {{incomplete}} |
| 126 | } |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | void i() { |
| 131 | h1<int[3]>(); |
| 132 | h2<int[]>(); // expected-note {{in instantiation of}} |
| 133 | } |
| 134 | |
| 135 | int arr5[3]; |
| 136 | template<typename T> void j() { |
| 137 | extern T arr5; |
| 138 | extern T arr6; |
| 139 | (void)sizeof(arr5); // expected-error {{incomplete}} |
| 140 | (void)sizeof(arr6); // expected-error {{incomplete}} |
| 141 | } |
| 142 | int arr6[3]; |
| 143 | |
| 144 | void k() { j<int[]>(); } // expected-note {{in instantiation of}} |
| 145 | |
| 146 | template<typename T, typename U> void l() { |
| 147 | extern T arrX; // expected-note {{previous}} |
| 148 | extern U arrX; // expected-error {{different type: 'int [4]' vs 'int [3]'}} |
| 149 | (void)sizeof(arrX); // expected-error {{incomplete}} |
| 150 | } |
| 151 | |
| 152 | void m() { |
| 153 | l<int[], int[3]>(); // ok |
| 154 | l<int[3], int[]>(); // ok |
| 155 | l<int[3], int[3]>(); // ok |
| 156 | l<int[3], int[4]>(); // expected-note {{in instantiation of}} |
| 157 | l<int[], int[]>(); // expected-note {{in instantiation of}} |
| 158 | } |
| 159 | |
| 160 | template<typename T> void n() { |
| 161 | extern T n_var; // expected-error {{redeclaration of 'n_var' with a different type: 'double' vs 'int'}} expected-note {{previous}} |
| 162 | extern T n_fn(); // expected-error {{functions that differ only in their return type cannot be overloaded}} expected-note {{previous}} |
| 163 | } |
| 164 | template void n<int>(); |
| 165 | template void n<double>(); // expected-note {{in instantiation of}} |
| 166 | |
| 167 | template<typename T> void o() { |
| 168 | extern T o_var; // expected-note {{previous}} |
| 169 | extern T o_fn(); // expected-note {{previous}} |
| 170 | } |
| 171 | template void o<int>(); |
| 172 | float o_var; // expected-error {{redefinition of 'o_var' with a different type: 'float' vs 'int'}} |
| 173 | float o_fn(); // expected-error {{functions that differ only in their return type cannot be overloaded}} |
| 174 | |
| 175 | int p_var; |
| 176 | int p_fn(); |
| 177 | template<typename T> void p() { |
| 178 | extern T p_var; |
| 179 | extern T p_fn(); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | namespace use_outside_ns { |
| 184 | namespace A { |
| 185 | extern int a[3]; |
| 186 | extern int b[]; |
| 187 | extern int c[3]; |
| 188 | void f() { |
| 189 | extern int a[]; |
| 190 | extern int b[3]; |
| 191 | } |
| 192 | template<typename T> void x() { |
| 193 | extern T c; |
| 194 | extern T d; |
| 195 | } |
| 196 | extern int d[3]; |
| 197 | template void x<int[]>(); |
| 198 | } |
| 199 | int w = sizeof(A::a); |
| 200 | int x = sizeof(A::b); // expected-error {{incomplete}} |
| 201 | int y = sizeof(A::c); |
| 202 | int z = sizeof(A::d); |
| 203 | namespace A { |
| 204 | int g() { return sizeof(a); } |
| 205 | int h() { return sizeof(b); } // expected-error {{incomplete}} |
| 206 | int i() { return sizeof(c); } |
| 207 | int j() { return sizeof(d); } |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | extern int arr[]; |
| 212 | void f1() { extern int arr[2]; } // expected-note {{previous}} |
| 213 | void f2() { extern int arr[3]; } // expected-error {{different type: 'int [3]' vs 'int [2]'}} |
| 214 | |