| // RUN: clang-cc -fsyntax-only -pedantic -verify %s |
| |
| int test(char *C) { // nothing here should warn. |
| return C != ((void*)0); |
| return C != (void*)0; |
| return C != 0; |
| return C != 1; // expected-warning {{comparison between pointer and integer ('char *' and 'int')}} |
| } |
| |
| int ints(long a, unsigned long b) { |
| return (a == b) + // expected-warning {{comparison of integers of different signs}} |
| ((int)a == b) + // expected-warning {{comparison of integers of different signs}} |
| ((short)a == b) + // expected-warning {{comparison of integers of different signs}} |
| (a == (unsigned int) b) + // expected-warning {{comparison of integers of different signs}} |
| (a == (unsigned short) b); // expected-warning {{comparison of integers of different signs}} |
| } |
| |
| int equal(char *a, const char *b) { |
| return a == b; |
| } |
| |
| int arrays(char (*a)[5], char(*b)[10], char(*c)[5]) { |
| int d = (a == c); |
| return a == b; // expected-warning {{comparison of distinct pointer types}} |
| } |
| |
| int pointers(int *a) { |
| return a > 0; // expected-warning {{ordered comparison between pointer and zero ('int *' and 'int') is an extension}} |
| return a > 42; // expected-warning {{ordered comparison between pointer and integer ('int *' and 'int')}} |
| return a > (void *)0; // expected-warning {{comparison of distinct pointer types}} |
| } |
| |
| int function_pointers(int (*a)(int), int (*b)(int), void (*c)(int)) { |
| return a > b; // expected-warning {{ordered comparison of function pointers}} |
| return function_pointers > function_pointers; // expected-warning {{ordered comparison of function pointers}} |
| return a > c; // expected-warning {{comparison of distinct pointer types}} |
| return a == (void *) 0; |
| return a == (void *) 1; // expected-warning {{equality comparison between function pointer and void pointer}} |
| } |
| |
| int void_pointers(void* foo) { |
| return foo == (void*) 0; |
| return foo == (void*) 1; |
| } |