rune_width :: (r: rune) -> int {
   if r < 0 return -1;

   if r <= 0x7F  return 1;
   if r <= 0x7FF return 2;

   if r >= 0xD800 &&
      r <= 0xDFFF return -1;

   if r <= 0xFFFF   return 3;
   if r <= 0x10FFFF return 4;

   return -1;
}

use_pascal_names :: (names: []string) {
   for name: names {
      b: basic.String_Builder;

      upper := false;
      for i: 0..name.count - 1 {
         c := name[i];
         if c == #char "_" {
            upper = true;
            continue;
         }

         if i == 0 {
            upper = true;
         }

         if upper {
            basic.append(*b, basic.to_upper(c));
            upper = false;
         } else {
            basic.append(*b, c);
         }
      }

      names[it_index] = basic.builder_to_string(*b);
   }
}