gcc/testsuite/c-c++-common/pr65120.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Wlogical-not-parentheses" } */
   3
   4 /* Test that we don't warn if rhs is 0 and comparison is == or !=.  */
   5
   6 #ifndef __cplusplus
   7 #define bool _Bool
   8 #endif
   9
  10 bool r;
  11
  12 void
  13 f1 (int a)
  14 {
  15   r = !a == 0;
  16   r = !a != 0;
  17   r = !a == 1;  /* { dg-warning "logical not is only applied to the left hand side of comparison" } */
  18   r = !a != 1;  /* { dg-warning "logical not is only applied to the left hand side of comparison" } */
  19 }
  20
  21 void
  22 f2 (int a)
  23 {
  24   r = !a > 0;   /* { dg-warning "logical not is only applied to the left hand side of comparison" } */
  25   r = !a >= 0;  /* { dg-warning "logical not is only applied to the left hand side of comparison" } */
  26   r = !a < 0;   /* { dg-warning "logical not is only applied to the left hand side of comparison" } */
  27   r = !a <= 0;  /* { dg-warning "logical not is only applied to the left hand side of comparison" } */
  28   r = !a > 1;   /* { dg-warning "logical not is only applied to the left hand side of comparison" } */
  29   r = !a >= 1;  /* { dg-warning "logical not is only applied to the left hand side of comparison" } */
  30   r = !a < 1;   /* { dg-warning "logical not is only applied to the left hand side of comparison" } */
  31   r = !a <= 1;  /* { dg-warning "logical not is only applied to the left hand side of comparison" } */
  32 }