/**
* Like {@link #enterRule} but for recursive rules. Make the current context the child of the
* incoming localctx.
*/
public void pushNewRecursionContext(ParserRuleContext localctx, int state, int ruleIndex) {
ParserRuleContext previous = _ctx;
previous.parent = localctx;
previous.invokingState = state;
previous.stop = _input.LT(-1);
_ctx = localctx;
_ctx.start = previous.start;
if (_buildParseTrees) {
_ctx.addChild(previous);
}
if (_parseListeners != null) {
triggerEnterRuleEvent(); // simulates rule entry for left-recursive rules
}
}
public void unrollRecursionContexts(ParserRuleContext _parentctx) {
_precedenceStack.pop();
_ctx.stop = _input.LT(-1);
ParserRuleContext retctx = _ctx; // save current ctx (return value)
// unroll so _ctx is as it was before call to recursive method
if (_parseListeners != null) {
while (_ctx != _parentctx) {
triggerExitRuleEvent();
_ctx = (ParserRuleContext) _ctx.parent;
}
} else {
_ctx = _parentctx;
}
// hook into tree
retctx.parent = _parentctx;
if (_buildParseTrees && _parentctx != null) {
// add return ctx into invoking rule's tree
_parentctx.addChild(retctx);
}
}