docs: public final BaseDescr primary() throws RecognitionException {
  		BaseDescr result = null;
  
  
  		Token i1=null;
  		Token i2=null;
  		Token DOT12=null;
  		Token SHARP13=null;
  		Token HASH14=null;
  		Token NULL_SAFE_DOT15=null;
  		BaseDescr expr =null;
  		ParserRuleReturnScope literal11 =null;
  
  		try {
  			// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:537:5: ( ( LEFT_PAREN )=>expr= parExpression | ( nonWildcardTypeArguments )=> nonWildcardTypeArguments ( explicitGenericInvocationSuffix | this_key arguments ) | ( literal )=> literal | ( super_key )=> super_key superSuffix | ( new_key )=> new_key creator | ( primitiveType )=> primitiveType ( LEFT_SQUARE RIGHT_SQUARE )* DOT class_key | ( inlineMapExpression )=> inlineMapExpression | ( inlineListExpression )=> inlineListExpression | ( ID )=>i1= ID ( ( ( DOT ID )=> DOT i2= ID ) | ( ( SHARP ID )=> SHARP i2= ID ) | ( ( HASH ID )=> HASH i2= ID ) | ( ( NULL_SAFE_DOT ID )=> NULL_SAFE_DOT i2= ID ) )* ( ( identifierSuffix )=> identifierSuffix )? )
  			int alt60=9;
  			int LA60_0 = input.LA(1);
  			if ( (LA60_0==LEFT_PAREN) && (synpred19_DRL5Expressions())) {
  				alt60=1;
  			}
  			else if ( (LA60_0==LESS) && (synpred20_DRL5Expressions())) {
  				alt60=2;
  			}
  			else if ( (LA60_0==STRING) && (synpred21_DRL5Expressions())) {
  				alt60=3;
  			}
  			else if ( (LA60_0==DECIMAL) && (synpred21_DRL5Expressions())) {
  				alt60=3;
  			}
  			else if ( (LA60_0==HEX) && (synpred21_DRL5Expressions())) {
  				alt60=3;
  			}
  			else if ( (LA60_0==FLOAT) && (synpred21_DRL5Expressions())) {
  				alt60=3;
  			}
  			else if ( (LA60_0==BOOL) && (synpred21_DRL5Expressions())) {
  				alt60=3;
  			}
  			else if ( (LA60_0==NULL) && (synpred21_DRL5Expressions())) {
  				alt60=3;
  			}
  			else if ( (LA60_0==TIME_INTERVAL) && (synpred21_DRL5Expressions())) {
  				alt60=3;
  			}
  			else if ( (LA60_0==STAR) && (synpred21_DRL5Expressions())) {
  				alt60=3;
  			}
  			else if ( (LA60_0==ID) ) {
  				int LA60_11 = input.LA(2);
  				if ( ((((helper.validateIdentifierKey(DroolsSoftKeywords.SUPER)))&&synpred22_DRL5Expressions())) ) {
  					alt60=4;
  				}
  				else if ( ((synpred23_DRL5Expressions()&&((helper.validateIdentifierKey(DroolsSoftKeywords.NEW))))) ) {
  					alt60=5;
  				}
  				else if ( (((((helper.validateIdentifierKey(DroolsSoftKeywords.SHORT)))||((helper.validateIdentifierKey(DroolsSoftKeywords.LONG)))||((helper.validateIdentifierKey(DroolsSoftKeywords.BOOLEAN)))||((helper.validateIdentifierKey(DroolsSoftKeywords.BYTE)))||((helper.validateIdentifierKey(DroolsSoftKeywords.FLOAT)))||((helper.validateIdentifierKey(DroolsSoftKeywords.DOUBLE)))||((helper.validateIdentifierKey(DroolsSoftKeywords.INT)))||((helper.validateIdentifierKey(DroolsSoftKeywords.CHAR))))&&synpred24_DRL5Expressions())) ) {
  					alt60=6;
  				}
  				else if ( (synpred27_DRL5Expressions()) ) {
  					alt60=9;
  				}
  
  				else {
  					if (state.backtracking>0) {state.failed=true; return result;}
  					int nvaeMark = input.mark();
  					try {
  						input.consume();
  						NoViableAltException nvae =
  							new NoViableAltException("", 60, 11, input);
  						throw nvae;
  					} finally {
  						input.rewind(nvaeMark);
  					}
  				}
  
  			}
  			else if ( (LA60_0==LEFT_SQUARE) ) {
  				int LA60_12 = input.LA(2);
  				if ( (synpred25_DRL5Expressions()) ) {
  					alt60=7;
  				}
  				else if ( (synpred26_DRL5Expressions()) ) {
  					alt60=8;
  				}
  
  				else {
  					if (state.backtracking>0) {state.failed=true; return result;}
  					int nvaeMark = input.mark();
  					try {
  						input.consume();
  						NoViableAltException nvae =
  							new NoViableAltException("", 60, 12, input);
  						throw nvae;
  					} finally {
  						input.rewind(nvaeMark);
  					}
  				}
  
  			}
  
  			else {
  				if (state.backtracking>0) {state.failed=true; return result;}
  				NoViableAltException nvae =
  					new NoViableAltException("", 60, 0, input);
  				throw nvae;
  			}
  
  			switch (alt60) {
  				case 1 :
  					// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:537:7: ( LEFT_PAREN )=>expr= parExpression
  					{
  					pushFollow(FOLLOW_parExpression_in_primary2727);
  					expr=parExpression();
  					state._fsp--;
  					if (state.failed) return result;
  					if ( state.backtracking==0 ) {  if( buildDescr  ) { result = expr; }  }
  					}
  					break;
  				case 2 :
  					// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:538:9: ( nonWildcardTypeArguments )=> nonWildcardTypeArguments ( explicitGenericInvocationSuffix | this_key arguments )
  					{
  					pushFollow(FOLLOW_nonWildcardTypeArguments_in_primary2744);
  					nonWildcardTypeArguments();
  					state._fsp--;
  					if (state.failed) return result;
  					// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:538:63: ( explicitGenericInvocationSuffix | this_key arguments )
  					int alt56=2;
  					int LA56_0 = input.LA(1);
  					if ( (LA56_0==ID) ) {
  						int LA56_1 = input.LA(2);
  						if ( (!((((helper.validateIdentifierKey(DroolsSoftKeywords.THIS)))))) ) {
  							alt56=1;
  						}
  						else if ( (((helper.validateIdentifierKey(DroolsSoftKeywords.THIS)))) ) {
  							alt56=2;
  						}
  
  						else {
  							if (state.backtracking>0) {state.failed=true; return result;}
  							int nvaeMark = input.mark();
  							try {
  								input.consume();
  								NoViableAltException nvae =
  									new NoViableAltException("", 56, 1, input);
  								throw nvae;
  							} finally {
  								input.rewind(nvaeMark);
  							}
  						}
  
  					}
  
  					else {
  						if (state.backtracking>0) {state.failed=true; return result;}
  						NoViableAltException nvae =
  							new NoViableAltException("", 56, 0, input);
  						throw nvae;
  					}
  
  					switch (alt56) {
  						case 1 :
  							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:538:64: explicitGenericInvocationSuffix
  							{
  							pushFollow(FOLLOW_explicitGenericInvocationSuffix_in_primary2747);
  							explicitGenericInvocationSuffix();
  							state._fsp--;
  							if (state.failed) return result;
  							}
  							break;
  						case 2 :
  							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:538:98: this_key arguments
  							{
  							pushFollow(FOLLOW_this_key_in_primary2751);
  							this_key();
  							state._fsp--;
  							if (state.failed) return result;
  							pushFollow(FOLLOW_arguments_in_primary2753);
  							arguments();
  							state._fsp--;
  							if (state.failed) return result;
  							}
  							break;
  
  					}
  
  					}
  					break;
  				case 3 :
  					// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:539:9: ( literal )=> literal
  					{
  					pushFollow(FOLLOW_literal_in_primary2769);
  					literal11=literal();
  					state._fsp--;
  					if (state.failed) return result;
  					if ( state.backtracking==0 ) { if( buildDescr  ) { result = new AtomicExprDescr( (literal11!=null?input.toString(literal11.start,literal11.stop):null), true ); }  }
  					}
  					break;
  				case 4 :
  					// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:541:9: ( super_key )=> super_key superSuffix
  					{
  					pushFollow(FOLLOW_super_key_in_primary2791);
  					super_key();
  					state._fsp--;
  					if (state.failed) return result;
  					pushFollow(FOLLOW_superSuffix_in_primary2793);
  					superSuffix();
  					state._fsp--;
  					if (state.failed) return result;
  					}
  					break;
  				case 5 :
  					// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:542:9: ( new_key )=> new_key creator
  					{
  					pushFollow(FOLLOW_new_key_in_primary2808);
  					new_key();
  					state._fsp--;
  					if (state.failed) return result;
  					pushFollow(FOLLOW_creator_in_primary2810);
  					creator();
  					state._fsp--;
  					if (state.failed) return result;
  					}
  					break;
  				case 6 :
  					// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:543:9: ( primitiveType )=> primitiveType ( LEFT_SQUARE RIGHT_SQUARE )* DOT class_key
  					{
  					pushFollow(FOLLOW_primitiveType_in_primary2825);
  					primitiveType();
  					state._fsp--;
  					if (state.failed) return result;
  					// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:543:41: ( LEFT_SQUARE RIGHT_SQUARE )*
  					loop57:
  					while (true) {
  						int alt57=2;
  						int LA57_0 = input.LA(1);
  						if ( (LA57_0==LEFT_SQUARE) ) {
  							alt57=1;
  						}
  
  						switch (alt57) {
  						case 1 :
  							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:543:42: LEFT_SQUARE RIGHT_SQUARE
  							{
  							match(input,LEFT_SQUARE,FOLLOW_LEFT_SQUARE_in_primary2828); if (state.failed) return result;
  							match(input,RIGHT_SQUARE,FOLLOW_RIGHT_SQUARE_in_primary2830); if (state.failed) return result;
  							}
  							break;
  
  						default :
  							break loop57;
  						}
  					}
  
  					match(input,DOT,FOLLOW_DOT_in_primary2834); if (state.failed) return result;
  					pushFollow(FOLLOW_class_key_in_primary2836);
  					class_key();
  					state._fsp--;
  					if (state.failed) return result;
  					}
  					break;
  				case 7 :
  					// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:545:9: ( inlineMapExpression )=> inlineMapExpression
  					{
  					pushFollow(FOLLOW_inlineMapExpression_in_primary2856);
  					inlineMapExpression();
  					state._fsp--;
  					if (state.failed) return result;
  					}
  					break;
  				case 8 :
  					// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:546:9: ( inlineListExpression )=> inlineListExpression
  					{
  					pushFollow(FOLLOW_inlineListExpression_in_primary2871);
  					inlineListExpression();
  					state._fsp--;
  					if (state.failed) return result;
  					}
  					break;
  				case 9 :
  					// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:547:9: ( ID )=>i1= ID ( ( ( DOT ID )=> DOT i2= ID ) | ( ( SHARP ID )=> SHARP i2= ID ) | ( ( HASH ID )=> HASH i2= ID ) | ( ( NULL_SAFE_DOT ID )=> NULL_SAFE_DOT i2= ID ) )* ( ( identifierSuffix )=> identifierSuffix )?
  					{
  					i1=(Token)match(input,ID,FOLLOW_ID_in_primary2887); if (state.failed) return result;
  					if ( state.backtracking==0 ) { helper.emit(i1, DroolsEditorType.IDENTIFIER); }
  					// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:548:9: ( ( ( DOT ID )=> DOT i2= ID ) | ( ( SHARP ID )=> SHARP i2= ID ) | ( ( HASH ID )=> HASH i2= ID ) | ( ( NULL_SAFE_DOT ID )=> NULL_SAFE_DOT i2= ID ) )*
  					loop58:
  					while (true) {
  						int alt58=5;
  						int LA58_0 = input.LA(1);
  						if ( (LA58_0==DOT) ) {
  							int LA58_2 = input.LA(2);
  							if ( (LA58_2==ID) ) {
  								int LA58_6 = input.LA(3);
  								if ( (synpred28_DRL5Expressions()) ) {
  									alt58=1;
  								}
  
  							}
  
  						}
  						else if ( (LA58_0==SHARP) && (synpred29_DRL5Expressions())) {
  							alt58=2;
  						}
  						else if ( (LA58_0==HASH) && (synpred30_DRL5Expressions())) {
  							alt58=3;
  						}
  						else if ( (LA58_0==NULL_SAFE_DOT) && (synpred31_DRL5Expressions())) {
  							alt58=4;
  						}
  
  						switch (alt58) {
  						case 1 :
  							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:549:13: ( ( DOT ID )=> DOT i2= ID )
  							{
  							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:549:13: ( ( DOT ID )=> DOT i2= ID )
  							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:549:15: ( DOT ID )=> DOT i2= ID
  							{
  							DOT12=(Token)match(input,DOT,FOLLOW_DOT_in_primary2921); if (state.failed) return result;
  							i2=(Token)match(input,ID,FOLLOW_ID_in_primary2925); if (state.failed) return result;
  							if ( state.backtracking==0 ) { helper.emit(DOT12, DroolsEditorType.SYMBOL); helper.emit(i2, DroolsEditorType.IDENTIFIER); }
  							}
  
  							}
  							break;
  						case 2 :
  							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:551:13: ( ( SHARP ID )=> SHARP i2= ID )
  							{
  							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:551:13: ( ( SHARP ID )=> SHARP i2= ID )
  							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:551:15: ( SHARP ID )=> SHARP i2= ID
  							{
  							SHARP13=(Token)match(input,SHARP,FOLLOW_SHARP_in_primary2965); if (state.failed) return result;
  							i2=(Token)match(input,ID,FOLLOW_ID_in_primary2969); if (state.failed) return result;
  							if ( state.backtracking==0 ) { helper.emit(SHARP13, DroolsEditorType.SYMBOL); helper.emit(i2, DroolsEditorType.IDENTIFIER); }
  							}
  
  							}
  							break;
  						case 3 :
  							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:553:13: ( ( HASH ID )=> HASH i2= ID )
  							{
  							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:553:13: ( ( HASH ID )=> HASH i2= ID )
  							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:553:15: ( HASH ID )=> HASH i2= ID
  							{
  							HASH14=(Token)match(input,HASH,FOLLOW_HASH_in_primary3009); if (state.failed) return result;
  							i2=(Token)match(input,ID,FOLLOW_ID_in_primary3013); if (state.failed) return result;
  							if ( state.backtracking==0 ) { helper.emit(HASH14, DroolsEditorType.SYMBOL); helper.emit(i2, DroolsEditorType.IDENTIFIER); }
  							}
  
  							}
  							break;
  						case 4 :
  							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:555:13: ( ( NULL_SAFE_DOT ID )=> NULL_SAFE_DOT i2= ID )
  							{
  							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:555:13: ( ( NULL_SAFE_DOT ID )=> NULL_SAFE_DOT i2= ID )
  							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:555:15: ( NULL_SAFE_DOT ID )=> NULL_SAFE_DOT i2= ID
  							{
  							NULL_SAFE_DOT15=(Token)match(input,NULL_SAFE_DOT,FOLLOW_NULL_SAFE_DOT_in_primary3053); if (state.failed) return result;
  							i2=(Token)match(input,ID,FOLLOW_ID_in_primary3057); if (state.failed) return result;
  							if ( state.backtracking==0 ) { helper.emit(NULL_SAFE_DOT15, DroolsEditorType.SYMBOL); helper.emit(i2, DroolsEditorType.IDENTIFIER); }
  							}
  
  							}
  							break;
  
  						default :
  							break loop58;
  						}
  					}
  
  					// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:556:12: ( ( identifierSuffix )=> identifierSuffix )?
  					int alt59=2;
  					int LA59_0 = input.LA(1);
  					if ( (LA59_0==LEFT_SQUARE) ) {
  						int LA59_1 = input.LA(2);
  						if ( (synpred32_DRL5Expressions()) ) {
  							alt59=1;
  						}
  					}
  					else if ( (LA59_0==LEFT_PAREN) ) {
  						int LA59_2 = input.LA(2);
  						if ( (synpred32_DRL5Expressions()) ) {
  							alt59=1;
  						}
  					}
  					switch (alt59) {
  						case 1 :
  							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:556:13: ( identifierSuffix )=> identifierSuffix
  							{
  							pushFollow(FOLLOW_identifierSuffix_in_primary3079);
  							identifierSuffix();
  							state._fsp--;
  							if (state.failed) return result;
  							}
  							break;
  
  					}
  
  					}
  					break;
  
  			}
  		}
  
  		catch (RecognitionException re) {
  		    throw re;
  		}
  
  		finally {
  			// do for sure before leaving
  		}
  		return result;
  	}