private ExpressionContext expression(int _p)
{
ParserRuleContext _parentctx = _ctx;
int _parentState = State;
ExpressionContext _localctx = new ExpressionContext(_ctx, _parentState);
ExpressionContext _prevctx = _localctx;
int _startState = 2;
EnterRecursionRule(_localctx, 2, RULE_expression, _p);
int _la;
try {
int _alt;
EnterOuterAlt(_localctx, 1);
{
State = 27;
_errHandler.Sync(this);
switch (_input.La(1))
{
case SHIFT_RIGHT:
case SHIFT_LEFT:
{
_localctx = new ShiftContext(_localctx);
_ctx = _localctx;
_prevctx = _localctx;
State = 10;
((ShiftContext)_localctx).op = _input.Lt(1);
_la = _input.La(1);
if (!(_la == SHIFT_RIGHT || _la == SHIFT_LEFT))
{
((ShiftContext)_localctx).op = _errHandler.RecoverInline(this);
}
else
{
if (_input.La(1) == TokenConstants.Eof)
{
matchedEOF = true;
}
_errHandler.ReportMatch(this);
Consume();
}
State = 11; Match(NUMBER);
State = 12; expression(6);
}
break;
case UPPER:
case LOWER:
{
_localctx = new CaseContext(_localctx);
_ctx = _localctx;
_prevctx = _localctx;
State = 13;
((CaseContext)_localctx).op = _input.Lt(1);
_la = _input.La(1);
if (!(_la == UPPER || _la == LOWER))
{
((CaseContext)_localctx).op = _errHandler.RecoverInline(this);
}
else
{
if (_input.La(1) == TokenConstants.Eof)
{
matchedEOF = true;
}
_errHandler.ReportMatch(this);
Consume();
}
State = 14; expression(5);
}
break;
case SUBSTRING:
{
_localctx = new SubstringContext(_localctx);
_ctx = _localctx;
_prevctx = _localctx;
State = 15; Match(SUBSTRING);
State = 16; Match(NUMBER);
State = 19;
_errHandler.Sync(this);
_la = _input.La(1);
if (_la == COMMA)
{
{
State = 17; Match(COMMA);
State = 18; Match(NUMBER);
}
}
State = 21; expression(4);
}
break;
case OBRACKET:
{
_localctx = new BracketsContext(_localctx);
_ctx = _localctx;
_prevctx = _localctx;
State = 22; Match(OBRACKET);
State = 23; expression(0);
State = 24; Match(CBRACKET);
}
break;
case STRING:
{
_localctx = new StringContext(_localctx);
_ctx = _localctx;
_prevctx = _localctx;
State = 26; Match(STRING);
}
break;
default:
throw new NoViableAltException(this);
}
_ctx.stop = _input.Lt(-1);
State = 34;
_errHandler.Sync(this);
_alt = Interpreter.AdaptivePredict(_input, 3, _ctx);
while (_alt != 2 && _alt != global::Antlr4.Runtime.Atn.ATN.InvalidAltNumber)
{
if (_alt == 1)
{
if (_parseListeners != null)
{
TriggerExitRuleEvent();
}
_prevctx = _localctx;
{
{
_localctx = new Con_diffContext(new ExpressionContext(_parentctx, _parentState));
PushNewRecursionContext(_localctx, _startState, RULE_expression);
State = 29;
if (!(Precpred(_ctx, 3)))
{
throw new FailedPredicateException(this, "Precpred(_ctx, 3)");
}
State = 30;
((Con_diffContext)_localctx).op = _input.Lt(1);
_la = _input.La(1);
if (!(_la == CONCANTENATE || _la == DIFFERENCE))
{
((Con_diffContext)_localctx).op = _errHandler.RecoverInline(this);
}
else
{
if (_input.La(1) == TokenConstants.Eof)
{
matchedEOF = true;
}
_errHandler.ReportMatch(this);
Consume();
}
State = 31; expression(4);
}
}
}
State = 36;
_errHandler.Sync(this);
_alt = Interpreter.AdaptivePredict(_input, 3, _ctx);
}
}
}
catch (RecognitionException re) {
_localctx.exception = re;
_errHandler.ReportError(this, re);
_errHandler.Recover(this, re);
}
finally {
UnrollRecursionContexts(_parentctx);
}
return(_localctx);
}
public override object VisitBrackets([NotNull] BracketsContext context)
{
return(Visit(context.expression()).ToString());
}
