Dmitri Gribenko | 625bb56 | 2012-02-14 22:14:32 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s |
| 2 | |
| 3 | void a(int i); |
| 4 | int b(); |
| 5 | int c(); |
| 6 | |
| 7 | void test1(int x, int y) { |
| 8 | while(true) { |
| 9 | if (x); // expected-warning {{if statement has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 10 | |
| 11 | int i; |
| 12 | // PR11329 |
| 13 | for (i = 0; i < x; i++); { // expected-warning{{for loop has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 14 | a(i); |
| 15 | b(); |
| 16 | } |
| 17 | |
| 18 | for (i = 0; i < x; i++); // expected-warning{{for loop has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 19 | { |
| 20 | a(i); |
| 21 | } |
| 22 | |
| 23 | for (i = 0; |
| 24 | i < x; |
| 25 | i++); // expected-warning{{for loop has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 26 | { |
| 27 | a(i); |
| 28 | } |
| 29 | |
| 30 | int arr[3] = { 1, 2, 3 }; |
| 31 | for (int j : arr); // expected-warning{{range-based for loop has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 32 | a(i); |
| 33 | |
| 34 | for (int j : |
| 35 | arr); // expected-warning{{range-based for loop has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 36 | a(i); |
| 37 | |
| 38 | while (b() == 0); // expected-warning{{while loop has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 39 | a(i); |
| 40 | |
| 41 | while (b() == 0); { // expected-warning{{while loop has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 42 | a(i); |
| 43 | } |
| 44 | |
| 45 | while (b() == 0); // expected-warning{{while loop has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 46 | { |
| 47 | a(i); |
| 48 | } |
| 49 | |
| 50 | while (b() == 0 || |
| 51 | c() == 0); // expected-warning{{while loop has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 52 | { |
| 53 | a(i); |
| 54 | } |
| 55 | |
| 56 | do; // expected-note{{to match this 'do'}} |
| 57 | b(); // expected-error{{expected 'while' in do/while loop}} |
| 58 | while (b()); // no-warning |
| 59 | c(); |
| 60 | |
| 61 | do; // expected-note{{to match this 'do'}} |
| 62 | b(); // expected-error{{expected 'while' in do/while loop}} |
| 63 | while (b()); // expected-warning{{while loop has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 64 | c(); |
| 65 | |
| 66 | switch(x) // no-warning |
| 67 | { |
| 68 | switch(y); // expected-warning{{switch statement has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 69 | { |
| 70 | case 0: |
| 71 | a(10); |
| 72 | break; |
| 73 | default: |
| 74 | a(20); |
| 75 | break; |
| 76 | } |
| 77 | } |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | /// There should be no warning when null statement is placed on its own line. |
| 82 | void test2(int x, int y) { |
| 83 | if (x) // no-warning |
| 84 | ; // no-warning |
| 85 | |
| 86 | int i; |
| 87 | for (i = 0; i < x; i++) // no-warning |
| 88 | ; // no-warning |
| 89 | |
| 90 | for (i = 0; |
| 91 | i < x; |
| 92 | i++) // no-warning |
| 93 | ; // no-warning |
| 94 | |
| 95 | int arr[3] = { 1, 2, 3 }; |
| 96 | for (int j : arr) // no-warning |
| 97 | ; // no-warning |
| 98 | |
| 99 | while (b() == 0) // no-warning |
| 100 | ; // no-warning |
| 101 | |
| 102 | while (b() == 0 || |
| 103 | c() == 0) // no-warning |
| 104 | ; // no-warning |
| 105 | |
| 106 | switch(x) |
| 107 | { |
| 108 | switch(y) // no-warning |
| 109 | ; // no-warning |
| 110 | } |
| 111 | |
| 112 | // Last `for' or `while' statement in compound statement shouldn't warn. |
| 113 | while(b() == 0); // no-warning |
| 114 | } |
| 115 | |
| 116 | /// There should be no warning for a null statement resulting from an empty macro. |
| 117 | #define EMPTY(a) |
| 118 | void test3(int x, int y) { |
| 119 | if (x) EMPTY(x); // no-warning |
| 120 | |
| 121 | int i; |
| 122 | for (i = 0; i < x; i++) EMPTY(i); // no-warning |
| 123 | |
| 124 | for (i = 0; |
| 125 | i < x; |
| 126 | i++) EMPTY(i); // no-warning |
| 127 | |
| 128 | int arr[3] = { 1, 2, 3 }; |
| 129 | for (int j : arr) EMPTY(j); // no-warning |
| 130 | |
| 131 | for (int j : |
| 132 | arr) EMPTY(j); // no-warning |
| 133 | |
| 134 | while (b() == 0) EMPTY(i); // no-warning |
| 135 | |
| 136 | while (b() == 0 || |
| 137 | c() == 0) EMPTY(i); // no-warning |
| 138 | |
| 139 | switch (x) { |
| 140 | switch (y) |
| 141 | EMPTY(i); // no-warning |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | void test4(int x) |
| 146 | { |
| 147 | // Idiom used in some metaprogramming constructs. |
| 148 | switch (x) default:; // no-warning |
| 149 | |
| 150 | // Frequent idiom used in macros. |
| 151 | do {} while (false); // no-warning |
| 152 | } |
| 153 | |
| 154 | /// There should be no warning for a common for/while idiom when it is obvious |
| 155 | /// from indentation that next statement wasn't meant to be a body. |
| 156 | void test5(int x, int y) { |
| 157 | int i; |
| 158 | for (i = 0; i < x; i++); // expected-warning{{for loop has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 159 | a(i); |
| 160 | |
| 161 | for (i = 0; i < x; i++); // no-warning |
| 162 | a(i); |
| 163 | |
| 164 | for (i = 0; |
| 165 | i < x; |
| 166 | i++); // expected-warning{{for loop has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 167 | a(i); |
| 168 | |
| 169 | for (i = 0; |
| 170 | i < x; |
| 171 | i++); // no-warning |
| 172 | a(i); |
| 173 | |
| 174 | while (b() == 0); // expected-warning{{while loop has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 175 | a(i); |
| 176 | |
| 177 | while (b() == 0); // no-warning |
| 178 | a(i); |
| 179 | |
| 180 | while (b() == 0 || |
| 181 | c() == 0); // expected-warning{{while loop has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 182 | a(i); |
| 183 | |
| 184 | while (b() == 0 || |
| 185 | c() == 0); // no-warning |
| 186 | a(i); |
| 187 | } |
| 188 | |
| 189 | /// There should be no warning for a statement with a non-null body. |
| 190 | void test6(int x, int y) { |
| 191 | if (x) {} // no-warning |
| 192 | |
| 193 | if (x) |
| 194 | a(x); // no-warning |
| 195 | |
| 196 | int i; |
| 197 | for (i = 0; i < x; i++) // no-warning |
| 198 | a(i); // no-warning |
| 199 | |
| 200 | for (i = 0; i < x; i++) { // no-warning |
| 201 | a(i); // no-warning |
| 202 | } |
| 203 | |
| 204 | for (i = 0; |
| 205 | i < x; |
| 206 | i++) // no-warning |
| 207 | a(i); // no-warning |
| 208 | |
| 209 | int arr[3] = { 1, 2, 3 }; |
| 210 | for (int j : arr) // no-warning |
| 211 | a(j); |
| 212 | |
| 213 | for (int j : arr) {} // no-warning |
| 214 | |
| 215 | while (b() == 0) // no-warning |
| 216 | a(i); // no-warning |
| 217 | |
| 218 | while (b() == 0) {} // no-warning |
| 219 | |
| 220 | switch(x) // no-warning |
| 221 | { |
| 222 | switch(y) // no-warning |
| 223 | { |
| 224 | case 0: |
| 225 | a(10); |
| 226 | break; |
| 227 | default: |
| 228 | a(20); |
| 229 | break; |
| 230 | } |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | void test_errors(int x) { |
| 235 | if (1) |
| 236 | aa; // expected-error{{use of undeclared identifier}} |
| 237 | // no empty body warning. |
| 238 | |
| 239 | int i; |
| 240 | for (i = 0; i < x; i++) |
| 241 | bb; // expected-error{{use of undeclared identifier}} |
| 242 | |
| 243 | int arr[3] = { 1, 2, 3 }; |
| 244 | for (int j : arr) |
| 245 | cc; // expected-error{{use of undeclared identifier}} |
| 246 | |
| 247 | while (b() == 0) |
| 248 | dd; // expected-error{{use of undeclared identifier}} |
| 249 | } |
| 250 | |
| 251 | // Warnings for statements in templates shouldn't be duplicated for all |
| 252 | // instantiations. |
| 253 | template <typename T> |
| 254 | void test_template(int x) { |
| 255 | if (x); // expected-warning{{if statement has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 256 | |
| 257 | if (x) |
| 258 | EMPTY(x); // no-warning |
| 259 | |
| 260 | int arr[3] = { 1, 2, 3 }; |
| 261 | for (int j : arr); // expected-warning{{range-based for loop has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 262 | |
| 263 | while (b() == 0); // expected-warning{{while loop has empty body}} expected-note{{put the semicolon on a separate line to silence this warning}} |
| 264 | a(x); |
| 265 | } |
| 266 | |
| 267 | void test_template_inst(int x) { |
| 268 | test_template<int>(x); |
| 269 | test_template<double>(x); |
| 270 | } |
| 271 | |