docs: public final DRL6Expressions.unaryExpressionNotPlusMinus_return unaryExpressionNotPlusMinus() throws RecognitionException {
  		DRL6Expressions.unaryExpressionNotPlusMinus_return retval = new DRL6Expressions.unaryExpressionNotPlusMinus_return();
  		retval.start = input.LT(1);
  
  		Token var=null;
  		Token COLON9=null;
  		Token UNIFY10=null;
  		BaseDescr left2 =null;
  		BaseDescr left1 =null;
  
  		 boolean isLeft = false; BindingDescr bind = null;
  		try {
  			// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:502:5: ( TILDE unaryExpression | NEGATION unaryExpression | ( castExpression )=> castExpression | ( backReferenceExpression )=> backReferenceExpression | ( ({...}? (var= ID COLON ) ) | ({...}? (var= ID UNIFY ) ) )? ( ( xpathSeparator ID )=>left2= xpathPrimary |left1= primary ) ( ( selector )=> selector )* ( ( INCR | DECR )=> ( INCR | DECR ) )? )
  			int alt54=5;
  			int LA54_0 = input.LA(1);
  			if ( (LA54_0==TILDE) ) {
  				alt54=1;
  			}
  			else if ( (LA54_0==NEGATION) ) {
  				alt54=2;
  			}
  			else if ( (LA54_0==LEFT_PAREN) ) {
  				int LA54_3 = input.LA(2);
  				if ( (synpred15_DRL6Expressions()) ) {
  					alt54=3;
  				}
  				else if ( (true) ) {
  					alt54=5;
  				}
  
  			}
  			else if ( (LA54_0==DOT) && (synpred16_DRL6Expressions())) {
  				alt54=4;
  			}
  			else if ( (LA54_0==BOOL||LA54_0==DECIMAL||LA54_0==DIV||LA54_0==FLOAT||LA54_0==HEX||LA54_0==ID||(LA54_0 >= LEFT_SQUARE && LA54_0 <= LESS)||LA54_0==NULL||LA54_0==QUESTION_DIV||(LA54_0 >= STAR && LA54_0 <= STRING)||LA54_0==TIME_INTERVAL) ) {
  				alt54=5;
  			}
  
  			else {
  				if (state.backtracking>0) {state.failed=true; return retval;}
  				NoViableAltException nvae =
  					new NoViableAltException("", 54, 0, input);
  				throw nvae;
  			}
  
  			switch (alt54) {
  				case 1 :
  					// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:502:9: TILDE unaryExpression
  					{
  					match(input,TILDE,FOLLOW_TILDE_in_unaryExpressionNotPlusMinus2453); if (state.failed) return retval;
  					pushFollow(FOLLOW_unaryExpression_in_unaryExpressionNotPlusMinus2455);
  					unaryExpression();
  					state._fsp--;
  					if (state.failed) return retval;
  					}
  					break;
  				case 2 :
  					// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:503:8: NEGATION unaryExpression
  					{
  					match(input,NEGATION,FOLLOW_NEGATION_in_unaryExpressionNotPlusMinus2464); if (state.failed) return retval;
  					pushFollow(FOLLOW_unaryExpression_in_unaryExpressionNotPlusMinus2466);
  					unaryExpression();
  					state._fsp--;
  					if (state.failed) return retval;
  					}
  					break;
  				case 3 :
  					// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:504:9: ( castExpression )=> castExpression
  					{
  					pushFollow(FOLLOW_castExpression_in_unaryExpressionNotPlusMinus2480);
  					castExpression();
  					state._fsp--;
  					if (state.failed) return retval;
  					}
  					break;
  				case 4 :
  					// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:505:9: ( backReferenceExpression )=> backReferenceExpression
  					{
  					pushFollow(FOLLOW_backReferenceExpression_in_unaryExpressionNotPlusMinus2494);
  					backReferenceExpression();
  					state._fsp--;
  					if (state.failed) return retval;
  					}
  					break;
  				case 5 :
  					// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:506:9: ( ({...}? (var= ID COLON ) ) | ({...}? (var= ID UNIFY ) ) )? ( ( xpathSeparator ID )=>left2= xpathPrimary |left1= primary ) ( ( selector )=> selector )* ( ( INCR | DECR )=> ( INCR | DECR ) )?
  					{
  					if ( state.backtracking==0 ) { isLeft = helper.getLeftMostExpr() == null;}
  					// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:507:9: ( ({...}? (var= ID COLON ) ) | ({...}? (var= ID UNIFY ) ) )?
  					int alt50=3;
  					int LA50_0 = input.LA(1);
  					if ( (LA50_0==ID) ) {
  						int LA50_1 = input.LA(2);
  						if ( (LA50_1==COLON) ) {
  							int LA50_3 = input.LA(3);
  							if ( ((inMap == 0 && ternOp == 0 && input.LA(2) == DRL6Lexer.COLON)) ) {
  								alt50=1;
  							}
  						}
  						else if ( (LA50_1==UNIFY) ) {
  							alt50=2;
  						}
  					}
  					switch (alt50) {
  						case 1 :
  							// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:507:11: ({...}? (var= ID COLON ) )
  							{
  							// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:507:11: ({...}? (var= ID COLON ) )
  							// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:507:12: {...}? (var= ID COLON )
  							{
  							if ( !((inMap == 0 && ternOp == 0 && input.LA(2) == DRL6Lexer.COLON)) ) {
  								if (state.backtracking>0) {state.failed=true; return retval;}
  								throw new FailedPredicateException(input, "unaryExpressionNotPlusMinus", "inMap == 0 && ternOp == 0 && input.LA(2) == DRL6Lexer.COLON");
  							}
  							// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:507:75: (var= ID COLON )
  							// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:507:76: var= ID COLON
  							{
  							var=(Token)match(input,ID,FOLLOW_ID_in_unaryExpressionNotPlusMinus2522); if (state.failed) return retval;
  							COLON9=(Token)match(input,COLON,FOLLOW_COLON_in_unaryExpressionNotPlusMinus2524); if (state.failed) return retval;
  							if ( state.backtracking==0 ) { hasBindings = true; helper.emit(var, DroolsEditorType.IDENTIFIER_VARIABLE); helper.emit(COLON9, DroolsEditorType.SYMBOL); if( buildDescr ) { bind = new BindingDescr((var!=null?var.getText():null), null, false); helper.setStart( bind, var ); } }
  							}
  
  							}
  
  							}
  							break;
  						case 2 :
  							// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:509:11: ({...}? (var= ID UNIFY ) )
  							{
  							// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:509:11: ({...}? (var= ID UNIFY ) )
  							// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:509:12: {...}? (var= ID UNIFY )
  							{
  							if ( !((inMap == 0 && ternOp == 0 && input.LA(2) == DRL6Lexer.UNIFY)) ) {
  								if (state.backtracking>0) {state.failed=true; return retval;}
  								throw new FailedPredicateException(input, "unaryExpressionNotPlusMinus", "inMap == 0 && ternOp == 0 && input.LA(2) == DRL6Lexer.UNIFY");
  							}
  							// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:509:75: (var= ID UNIFY )
  							// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:509:76: var= ID UNIFY
  							{
  							var=(Token)match(input,ID,FOLLOW_ID_in_unaryExpressionNotPlusMinus2563); if (state.failed) return retval;
  							UNIFY10=(Token)match(input,UNIFY,FOLLOW_UNIFY_in_unaryExpressionNotPlusMinus2565); if (state.failed) return retval;
  							if ( state.backtracking==0 ) { hasBindings = true; helper.emit(var, DroolsEditorType.IDENTIFIER_VARIABLE); helper.emit(UNIFY10, DroolsEditorType.SYMBOL); if( buildDescr ) { bind = new BindingDescr((var!=null?var.getText():null), null, true); helper.setStart( bind, var ); } }
  							}
  
  							}
  
  							}
  							break;
  
  					}
  
  					// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:513:9: ( ( xpathSeparator ID )=>left2= xpathPrimary |left1= primary )
  					int alt51=2;
  					int LA51_0 = input.LA(1);
  					if ( (LA51_0==DIV||LA51_0==QUESTION_DIV) && (synpred17_DRL6Expressions())) {
  						alt51=1;
  					}
  					else if ( (LA51_0==BOOL||LA51_0==DECIMAL||LA51_0==FLOAT||LA51_0==HEX||LA51_0==ID||(LA51_0 >= LEFT_PAREN && LA51_0 <= LESS)||LA51_0==NULL||(LA51_0 >= STAR && LA51_0 <= STRING)||LA51_0==TIME_INTERVAL) ) {
  						alt51=2;
  					}
  
  					else {
  						if (state.backtracking>0) {state.failed=true; return retval;}
  						NoViableAltException nvae =
  							new NoViableAltException("", 51, 0, input);
  						throw nvae;
  					}
  
  					switch (alt51) {
  						case 1 :
  							// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:513:11: ( xpathSeparator ID )=>left2= xpathPrimary
  							{
  							pushFollow(FOLLOW_xpathPrimary_in_unaryExpressionNotPlusMinus2619);
  							left2=xpathPrimary();
  							state._fsp--;
  							if (state.failed) return retval;
  							if ( state.backtracking==0 ) { if( buildDescr ) { retval.result = left2; } }
  							}
  							break;
  						case 2 :
  							// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:514:13: left1= primary
  							{
  							pushFollow(FOLLOW_primary_in_unaryExpressionNotPlusMinus2637);
  							left1=primary();
  							state._fsp--;
  							if (state.failed) return retval;
  							if ( state.backtracking==0 ) { if( buildDescr ) { retval.result = left1; } }
  							}
  							break;
  
  					}
  
  					// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:517:9: ( ( selector )=> selector )*
  					loop52:
  					while (true) {
  						int alt52=2;
  						int LA52_0 = input.LA(1);
  						if ( (LA52_0==DOT) && (synpred18_DRL6Expressions())) {
  							alt52=1;
  						}
  						else if ( (LA52_0==LEFT_SQUARE) && (synpred18_DRL6Expressions())) {
  							alt52=1;
  						}
  
  						switch (alt52) {
  						case 1 :
  							// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:517:10: ( selector )=> selector
  							{
  							pushFollow(FOLLOW_selector_in_unaryExpressionNotPlusMinus2665);
  							selector();
  							state._fsp--;
  							if (state.failed) return retval;
  							}
  							break;
  
  						default :
  							break loop52;
  						}
  					}
  
  					if ( state.backtracking==0 ) {
  					            if( buildDescr ) {
  					                String expr = input.toString(retval.start,input.LT(-1));
  					                if( isLeft ) {
  					                    helper.setLeftMostExpr( expr );
  					                }
  					                if( bind != null ) {
  					                    if( bind.isUnification() ) {
  					                        expr = expr.substring( expr.indexOf( ":=" ) + 2 ).trim();
  					                    } else {
  					                        expr = expr.substring( expr.indexOf( ":" ) + 1 ).trim();
  					                    }
  					                    bind.setExpressionAndBindingField( expr );
  					                    helper.setEnd( bind );
  					                    retval.result = bind;
  					                }
  					            }
  					        }
  					// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:536:9: ( ( INCR | DECR )=> ( INCR | DECR ) )?
  					int alt53=2;
  					int LA53_0 = input.LA(1);
  					if ( (LA53_0==DECR||LA53_0==INCR) && (synpred19_DRL6Expressions())) {
  						alt53=1;
  					}
  					switch (alt53) {
  						case 1 :
  							// src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:536:10: ( INCR | DECR )=> ( INCR | DECR )
  							{
  							if ( input.LA(1)==DECR||input.LA(1)==INCR ) {
  								input.consume();
  								state.errorRecovery=false;
  								state.failed=false;
  							}
  							else {
  								if (state.backtracking>0) {state.failed=true; return retval;}
  								MismatchedSetException mse = new MismatchedSetException(null,input);
  								throw mse;
  							}
  							}
  							break;
  
  					}
  
  					}
  					break;
  
  			}
  			retval.stop = input.LT(-1);
  
  		}
  
  		catch (RecognitionException re) {
  		    throw re;
  		}
  
  		finally {
  			// do for sure before leaving
  		}
  		return retval;
  	}