unrollRecursionContexts method

void unrollRecursionContexts(ParserRuleContext? _parentctx)

Implementation

void unrollRecursionContexts(ParserRuleContext? _parentctx) {
  assert(context != null);
  _precedenceStack.removeLast();
  context!.stop = _input.LT(-1);
  final retctx = context!; // save current ctx (return value)

  // unroll so _ctx is as it was before call to recursive method
  if (_parseListeners != null) {
    while (context != _parentctx) {
      triggerExitRuleEvent();
      context = context!.parent;
    }
  } else {
    context = _parentctx;
  }

  // hook into tree
  retctx.parent = _parentctx;

  if (buildParseTree && _parentctx != null) {
    // add return ctx into invoking rule's tree
    _parentctx.addAnyChild(retctx);
  }
}