/**
* Get the precedence level for the top-most precedence rule.
*
* @return The precedence level for the top-most precedence rule, or -1 if the parser context is
* not nested within a precedence rule.
*/
public final int getPrecedence() {
if (_precedenceStack.isEmpty()) {
return -1;
}
return _precedenceStack.peek();
}
/** reset the parser's state */
public void reset() {
if (getInputStream() != null) getInputStream().seek(0);
_errHandler.reset(this);
_ctx = null;
_syntaxErrors = 0;
matchedEOF = false;
setTrace(false);
_precedenceStack.clear();
_precedenceStack.push(0);
ATNSimulator interpreter = getInterpreter();
if (interpreter != null) {
interpreter.reset();
}
}
public void enterRecursionRule(
ParserRuleContext localctx, int state, int ruleIndex, int precedence) {
setState(state);
_precedenceStack.push(precedence);
_ctx = localctx;
_ctx.start = _input.LT(1);
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);
}
}
@Override
public boolean precpred(RuleContext localctx, int precedence) {
return precedence >= _precedenceStack.peek();
}
{
_precedenceStack = new IntegerStack();
_precedenceStack.push(0);
}
