clang/test/Sema/warn-null.c

   1 // RUN: %clang_cc1 %s -verify
   2
   3 #define SOME_ADDR (unsigned long long)0
   4
   5 // PR10837: Warn if a non-pointer-typed expression is folded to a null pointer
   6 int *p = 0;
   7 int *q = '\0'; // expected-warning{{expression which evaluates to zero treated as a null pointer constant}}
   8 int *r = (1 - 1); // expected-warning{{expression which evaluates to zero treated as a null pointer constant}}
   9 void f(void) {
  10   p = 0;
  11   q = '\0'; // expected-warning{{expression which evaluates to zero treated as a null pointer constant}}
  12   r = 1 - 1; // expected-warning{{expression which evaluates to zero treated as a null pointer constant}}
  13   p = SOME_ADDR; // expected-warning{{expression which evaluates to zero treated as a null pointer constant}}
  14 }