public final GuardContext guard() throws RecognitionException {
		GuardContext _localctx = new GuardContext(_ctx, getState());
		enterRule(_localctx, 92, RULE_guard);
		int _la;
		try {
			int _alt;
			setState(946);
			switch (_input.LA(1)) {
			case T__53:
			case T__52:
			case T__49:
			case T__47:
			case T__46:
			case T__44:
			case T__34:
			case T__29:
			case T__20:
			case GID:
			case ID:
			case MSTRING:
			case AddOP:
			case MulOP:
			case UnaryOP:
			case HEX:
			case DEC:
			case OCT:
			case BIN:
			case FLOAT:
			case CHAR:
			case STRING:
				_localctx = new ExpGuardContext(_localctx);
				enterOuterAlt(_localctx, 1);
				{
				setState(930); exp(0);
				setState(934);
				_errHandler.sync(this);
				_la = _input.LA(1);
				while (_la==T__35) {
					{
					{
					setState(931); annotation();
					}
					}
					setState(936);
					_errHandler.sync(this);
					_la = _input.LA(1);
				}
				setState(937); match(T__15);
				}
				break;
			case T__3:
				_localctx = new ElseGuardContext(_localctx);
				enterOuterAlt(_localctx, 2);
				{
				setState(939); match(T__3);
				setState(943);
				_errHandler.sync(this);
				_alt = getInterpreter().adaptivePredict(_input,129,_ctx);
				while ( _alt!=2 && _alt!=org.antlr.v4.runtime.atn.ATN.INVALID_ALT_NUMBER ) {
					if ( _alt==1 ) {
						{
						{
						setState(940); annotation();
						}
						} 
					}
					setState(945);
					_errHandler.sync(this);
					_alt = getInterpreter().adaptivePredict(_input,129,_ctx);
				}
				}
				break;
			default:
				throw new NoViableAltException(this);
			}
		}
		catch (RecognitionException re) {
			_localctx.exception = re;
			_errHandler.reportError(this, re);
			_errHandler.recover(this, re);
		}
		finally {
			exitRule();
		}
		return _localctx;
	}