test/Sema/string-plus-char.c

// RUN: %clang_cc1 -fsyntax-only -verify %s

void f(const char *s) {
  char *str = 0;
  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}}

  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}}

  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}}

  // no-warning
  char c = 'c';
  str = str + c;
  str = c + str;
}