Function createlabel

3rd/lua-5.4.3/src/lparser.c:596–610

** Create a new label with the given 'name' at the given 'line'. ** 'last' tells whether label is the last non-op statement in its ** block. Solves all pending goto's to this new label and adds ** a close instruction if necessary. ** Returns true iff it added a close instruction. */

** Returns true iff it added a close instruction.
*/
static int createlabel (LexState *ls, TString *name, int line,
                        int last) {
  FuncState *fs = ls->fs;
  Labellist *ll = &ls->dyd->label;
  int l = newlabelentry(ls, ll, name, line, luaK_getlabel(fs));
  if (last) {  /* label is last no-op statement in the block? */
    /* assume that locals are already out of scope */
    ll->arr[l].nactvar = fs->bl->nactvar;
  }
  if (solvegotos(ls, &ll->arr[l])) {  /* need close? */
    luaK_codeABC(fs, OP_CLOSE, luaY_nvarstack(fs), 0, 0);
    return 1;
  }
  return 0;
}


/*