public virtual void EnterOuterAlt(ParserRuleContext localctx, int altNum)
{
localctx.setAltNumber(altNum);
// if we have new localctx, make sure we replace existing ctx
// that is previous child of parse tree
if (_buildParseTrees && _ctx != localctx)
{
ParserRuleContext parent = (ParserRuleContext)_ctx.Parent;
if (parent != null)
{
parent.RemoveLastChild();
parent.AddChild(localctx);
}
}
_ctx = localctx;
}
public virtual void EnterLeftFactoredRule(ParserRuleContext localctx, int state, int ruleIndex)
{
State = state;
if (_buildParseTrees)
{
ParserRuleContext factoredContext = (ParserRuleContext)_ctx.GetChild(_ctx.ChildCount - 1);
_ctx.RemoveLastChild();
factoredContext.Parent = localctx;
localctx.AddChild(factoredContext);
}
_ctx = localctx;
_ctx.Start = _input.LT(1);
if (_buildParseTrees)
{
AddContextToParseTree();
}
if (_parseListeners != null)
{
TriggerEnterRuleEvent();
}
}