AndExpression returns ConstantExpression
   : ShiftExpression ({AndExpression.left=current} "&" right=ShiftExpression)*
   ;
   
AdditiveExpression returns ConstantExpression
   : MultiplicativeExpression ({AdditiveExpression.left=current} additionKind+=AdditionKind right=MultiplicativeExpression)*
   ;

EnumInt returns EnumDefinition
   : "enum" "{" enumList+=EnumItem ("," enumList+=EnumItem)* "}" 
      name=DSLID/(withString?="string")?
   ;

FuntionParameter 
   : funtionKind=FunctionKind type=DSLType (byKey?="bykey")? (byDefinition?="bydefinition")?
      (parametername=DSLRelaxedID)? (dimensions+=Dimension)* (noTrace?="notrace")? ";"
   ;

// Java API to access grammar elements (required by several other fragments)
                fragment = grammarAccess.GrammarAccessFragment auto-inject {}
    
                // generates Java API for the generated EPackages
                fragment = ecore.EMFGeneratorFragment auto-inject {}    
    
                // Serializer 2.0
                fragment = serializer.SerializerFragment auto-inject {
                  generateStub = false
                }
                
                // a custom ResourceFactory for use with EMF
                fragment = resourceFactory.ResourceFactoryFragment auto-inject {
                    fileExtensions = file.extensions
                }
    
                  // The antlr parser generator fragment.
                  fragment = parser.antlr.ex.rt.AntlrGeneratorFragment auto-inject {
                     options = {
                        ignoreCase = true
                     }
                  }
    
                // generates a more lightweight Antlr parser and lexer tailored ...
                     fragment = parser.antlr.ex.ca.ContentAssistParserGeneratorFragment auto-inject {
                        options = {
                            ignoreCase = true
                     }
                 }
                // java-based API for validation
                fragment = validation.JavaValidatorFragment  auto-inject {
                //    composedCheck = "org.eclipse.xtext.validation.ImportUriValidator"
                  composedCheck = "org.eclipse.xtext.validation.NamesAreUniqueValidator"
                }
    
                // scoping and exporting API
                fragment = scoping.ImportNamespacesScopingFragment auto-inject {
                   ignoreCase = true                   
                }
                //HAMI: Use simple names
                //fragment = exporting.QualifiedNamesFragment {}
                fragment = builder.BuilderIntegrationFragment auto-inject {}
    
                // generator API
                fragment = generator.GeneratorFragment auto-inject {
                  generateMwe = true
                  generateJavaMain = true
//                  generatorStub = true
                }
    
                // formatter API
                fragment = formatting.FormatterFragment auto-inject {}
               // content assist API
                fragment = contentAssist.JavaBasedContentAssistFragment auto-inject {}
    
                // rename refactoring
                fragment = refactoring.RefactorElementNameFragment auto-inject {}

@Override
	protected void fireDocumentChanged(DocumentEvent event) {
		tokenSource.updateStructure(event);  // if I comment this line, I do not fave syntax coloring  and typing is very fast
		super.fireDocumentChanged(event);
	}