Function reglevel

3rd/lua-5.4.3/src/lparser.c:229–236

** Convert 'nvar', a compiler index level, to its corresponding ** register. For that, search for the highest variable below that level ** that is in a register and uses its register index ('ridx') plus one. */

** that is in a register and uses its register index ('ridx') plus one.
*/
static int reglevel (FuncState *fs, int nvar) {
  while (nvar-- > 0) {
    Vardesc *vd = getlocalvardesc(fs, nvar);  /* get previous variable */
    if (vd->vd.kind != RDKCTC)  /* is in a register? */
      return vd->vd.ridx + 1;
  }
  return 0;  /* no variables in registers */
}


/*