gcc/testsuite/gcc.dg/c2x-utf8char-1.c

   1 /* Test C2x UTF-8 characters.  Test valid usages.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-std=c2x -pedantic-errors" } */
   4
   5 unsigned char a = u8'a';
   6 _Static_assert (u8'a' == 97);
   7
   8 unsigned char b = u8'\0';
   9 _Static_assert (u8'\0' == 0);
  10
  11 unsigned char c = u8'\xff';
  12 _Static_assert (u8'\xff' == 255);
  13
  14 unsigned char d = u8'\377';
  15 _Static_assert (u8'\377' == 255);
  16
  17 _Static_assert (sizeof (u8'a') == 1);
  18 _Static_assert (sizeof (u8'\0') == 1);
  19 _Static_assert (sizeof (u8'\xff') == 1);
  20 _Static_assert (sizeof (u8'\377') == 1);
  21
  22 _Static_assert (_Generic (u8'a', unsigned char: 1, default: 2) == 1);
  23 _Static_assert (_Generic (u8'\0', unsigned char: 1, default: 2) == 1);
  24 _Static_assert (_Generic (u8'\xff', unsigned char: 1, default: 2) == 1);
  25 _Static_assert (_Generic (u8'\377', unsigned char: 1, default: 2) == 1);
  26
  27 #if u8'\0' - 1 < 0
  28 #error "UTF-8 constants not unsigned in preprocessor"
  29 #endif