George Burgess IV | a5c25c5 | 2019-08-05 23:19:15 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -fsyntax-only -verify -Wall %s -std=c11 |
George Burgess IV | f708f0a | 2019-08-05 22:15:40 +0000 | [diff] [blame] | 2 | |
| 3 | int test1(int *a) { |
| 4 | return a == '\0'; // expected-warning {{comparing a pointer to a null character constant; did you mean to compare to (void *)0?}} |
| 5 | } |
| 6 | |
| 7 | int test2(int *a) { |
| 8 | return '\0' == a; // expected-warning {{comparing a pointer to a null character constant; did you mean to compare to (void *)0?}} |
| 9 | } |
| 10 | |
| 11 | int test3(int *a) { |
| 12 | return a == L'\0'; // expected-warning {{comparing a pointer to a null character constant; did you mean to compare to (void *)0?}} |
| 13 | } |
| 14 | |
| 15 | int test4(int *a) { |
| 16 | return a == u'\0'; // expected-warning {{comparing a pointer to a null character constant; did you mean to compare to (void *)0?}} |
| 17 | } |
| 18 | |
| 19 | int test5(int *a) { |
| 20 | return a == U'\0'; // expected-warning {{comparing a pointer to a null character constant; did you mean to compare to (void *)0?}} |
| 21 | } |
| 22 | |
| 23 | int test6(int *a) { |
| 24 | return a == (char)0; // expected-warning {{comparing a pointer to a null character constant; did you mean to compare to (void *)0?}} |
| 25 | } |
| 26 | |
| 27 | typedef char my_char; |
| 28 | int test7(int *a) { |
| 29 | return a == (my_char)0; |
| 30 | // expected-warning@-1 {{comparing a pointer to a null character constant; did you mean to compare to (void *)0?}} |
| 31 | } |
| 32 | |
| 33 | int test8(int *a) { |
| 34 | return a != '\0'; // expected-warning {{comparing a pointer to a null character constant; did you mean to compare to (void *)0?}} |
| 35 | } |
| 36 | |
| 37 | #define NULL (void *)0 |
| 38 | int test9(int *a) { |
| 39 | return a == '\0'; // expected-warning {{comparing a pointer to a null character constant; did you mean to compare to NULL?}} |
| 40 | } |
| 41 | |
| 42 | #define MYCHAR char |
| 43 | int test10(int *a) { |
| 44 | return a == (MYCHAR)0; // expected-warning {{comparing a pointer to a null character constant; did you mean to compare to NULL?}} |
| 45 | } |
| 46 | |
| 47 | int test11(int *a) { |
| 48 | return a > '\0'; |
| 49 | } |