Function skip_sep

depends/lua/src/llex.c:251–264

** reads a sequence '[=*[' or ']=*]', leaving the last bracket. ** If sequence is well formed, return its number of '='s + 2; otherwise, ** return 1 if there is no '='s or 0 otherwise (an unfinished '[==...'). */

** return 1 if there is no '='s or 0 otherwise (an unfinished '[==...').
*/
static size_t skip_sep (LexState *ls) {
  size_t count = 0;
  int s = ls->current;
  lua_assert(s == '[' || s == ']');
  save_and_next(ls);
  while (ls->current == '=') {
    save_and_next(ls);
    count++;
  }
  return (ls->current == s) ? count + 2
         : (count == 0) ? 1
         : 0;

}


static void read_long_string (LexState *ls, SemInfo *seminfo, size_t sep) {