java.lang.RuntimeException: No EObjectDescription could be found in Scope NamedReference.id for File.statements[0]->Block.statements[1]->Block.statements[0]->Variable'x'
Semantic Object: File.statements[0]->Block.statements[1]->Block.statements[1]->ExpressionStatement.expr->AssignmentExpression.left->NamedReference
URI: file:/c:/temp/test3.mydsl
EStructuralFeature: myDsl::NamedReference.id
	at org.eclipse.xtext.serializer.diagnostic.ISerializationDiagnostic$ExceptionThrowingAcceptor.accept(ISerializationDiagnostic.java:131)
	at org.eclipse.xtext.serializer.tokens.CrossReferenceSerializer.getCrossReferenceNameFromScope(CrossReferenceSerializer.java:138)
...

{
	{
		int x=1;
		x = 2;
	}
	{
		int x=3;
		x = 4;
	}
}

	def File CreateFile() {
		val file = MyDslFactory.eINSTANCE.createFile();
		val block1 = MyDslFactory.eINSTANCE.createBlock();
		file.getStatements.add(block1)
		val block2 = MyDslFactory.eINSTANCE.createBlock();
		block1.getStatements.add(block2)
		val var1 = MyDslFactory.eINSTANCE.createVariable();
		val type1 = MyDslFactory.eINSTANCE.createType();
		type1.setType("int")
		var1.setType(type1)
		var1.setName("x")
		block2.getStatements.add(var1)
		val literal1 = MyDslFactory.eINSTANCE.createExpression()
		literal1.setValue(1)
		var1.setRight(literal1)
		val literal2 = MyDslFactory.eINSTANCE.createExpression()
		literal2.setValue(2)
		val ae1 = MyDslFactory.eINSTANCE.createAssignmentExpression()
		ae1.setRight(literal2)
		val nr1 = MyDslFactory.eINSTANCE.createNamedReference()
		nr1.setId(var1)
		ae1.setLeft(nr1)
		val es1 = MyDslFactory.eINSTANCE.createExpressionStatement()
		es1.setExpr(ae1)
		block2.getStatements.add(es1)

		val block3 = MyDslFactory.eINSTANCE.createBlock();
		block1.getStatements.add(block3)
		
		val var2 = MyDslFactory.eINSTANCE.createVariable();
		val type2 = MyDslFactory.eINSTANCE.createType();
		type2.setType("int")
		var2.setType(type2)
		var2.setName("x")
		block3.getStatements.add(var2)
		val literal3 = MyDslFactory.eINSTANCE.createExpression()
		literal3.setValue(3)
		var2.setRight(literal3)
		val literal4 = MyDslFactory.eINSTANCE.createExpression()
		literal4.setValue(4)

		val ae2 = MyDslFactory.eINSTANCE.createAssignmentExpression()
		ae2.setRight(literal4)
		val nr2 = MyDslFactory.eINSTANCE.createNamedReference()
		nr2.setId(var2)
		ae2.setLeft(nr2)
		val es2 = MyDslFactory.eINSTANCE.createExpressionStatement()
		es2.setExpr(ae2)
		block3.getStatements.add(es2)

		return file
	}

grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals

generate myDsl "http://www.xtext.org/example/mydsl/MyDsl"

File:
	statements+=GeneralStatement+;

GeneralStatement:
	ExpressionStatement
	| Block
	| VariableStatement;

Block:
	{Block} "{" (statements+=GeneralStatement)* "}";

ExpressionStatement:
	expr=Expression ';';

VariableStatement:
	Variable ('=' right=Expression)? ';';

Variable:
	type=Type name=ID;

Type:
	type=('int');

Expression:
	AssignmentExpression;

AssignmentExpression returns Expression:
	AtomicExpression ({AssignmentExpression.left=current} '=' right=AtomicExpression)*;

AtomicExpression returns Expression:
	'(' Expression ')'
	| LiteralExpr
	| NamedReference;

LiteralExpr returns Expression:
	value=INT;

NamedReference:
	id=[Element];

Element:
	Variable;

	def String serialize(EObject obj, String resourceURILocation) {
		val uri = URI.createFileURI(resourceURILocation);
		val setup = new MyDslStandaloneSetupGenerated();
		val injector = setup.createInjectorAndDoEMFRegistration();
		val resourceSet = injector.getInstance(typeof(XtextResourceSet));
		val resource = resourceSet.createResource(uri);
		resource.getContents().add(obj);
		val serializer = injector.getInstance(typeof(ISerializer));
		val result = serializer.serialize(obj);
		return result;
	}