clang/test/Sema/string-plus-char.c

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s
   2
   3 struct AB{const char *a; const char*b;};
   4
   5 const char *foo(const struct AB *ab) {
   6   return ab->a + 'b'; // expected-warning {{adding 'char' to a string pointer does not append to the string}} expected-note {{use array indexing to silence this warning}}
   7 }
   8
   9 void f(const char *s) {
  10   char *str = 0;
  11   char *str2 = str + 'c'; // expected-warning {{adding 'char' to a string pointer does not append to the string}} expected-note {{use array indexing to silence this warning}}
  12
  13   const char *constStr = s + 'c'; // expected-warning {{adding 'char' to a string pointer does not append to the string}} expected-note {{use array indexing to silence this warning}}
  14
  15   str = 'c' + str;// expected-warning {{adding 'char' to a string pointer does not append to the string}} expected-note {{use array indexing to silence this warning}}
  16
  17   char strArr[] = "foo";
  18   str = strArr + 'c'; // expected-warning {{adding 'char' to a string pointer does not append to the string}} expected-note {{use array indexing to silence this warning}}
  19   char *strArr2[] = {"ac","dc"};
  20   str = strArr2[0] + 'c'; // expected-warning {{adding 'char' to a string pointer does not append to the string}} expected-note {{use array indexing to silence this warning}}
  21
  22
  23   struct AB ab;
  24   constStr = foo(&ab) + 'c'; // expected-warning {{adding 'char' to a string pointer does not append to the string}} expected-note {{use array indexing to silence this warning}}
  25
  26   // no-warning
  27   char c = 'c';
  28   str = str + c;
  29   str = c + str;
  30 }