rewrite.markAsReplaced(preExpression, PrefixExpression.OPERATOR_PROPERTY, PrefixExpression.Operator.COMPLEMENT, null);
rewrite.set(preExpression, PrefixExpression.OPERATOR_PROPERTY, PrefixExpression.Operator.COMPLEMENT, null);
	public void testPrefixExpression() throws Exception {		IPackageFragment pack1= fSourceFolder.createPackageFragment("test1", false, null);		StringBuffer buf= new StringBuffer();		buf.append("package test1;\n");		buf.append("public class E {\n");		buf.append("    public void foo() {\n");		buf.append("        i= --x;\n");		buf.append("    }\n");		buf.append("}\n");			ICompilationUnit cu= pack1.createCompilationUnit("E.java", buf.toString(), false, null);				CompilationUnit astRoot= createAST(cu);		NewASTRewrite rewrite= new NewASTRewrite(astRoot.getAST());				AST ast= astRoot.getAST();				assertTrue("Parse errors", (astRoot.getFlags() & ASTNode.MALFORMED) == 0);		TypeDeclaration type= findTypeDeclaration(astRoot, "E");		MethodDeclaration methodDecl= findMethodDeclaration(type, "foo");		Block block= methodDecl.getBody();		List statements= block.statements();		assertTrue("Number of statements not 1", statements.size() == 1);		{ // modify operand and operation			ExpressionStatement stmt= (ExpressionStatement) statements.get(0);			Assignment assignment= (Assignment) stmt.getExpression();						PrefixExpression preExpression= (PrefixExpression) assignment.getRightHandSide();								NumberLiteral newOperation= ast.newNumberLiteral("10");			rewrite.markAsReplaced(preExpression.getOperand(), newOperation);						rewrite.markAsReplaced(preExpression, PrefixExpression.OPERATOR_PROPERTY, PrefixExpression.Operator.COMPLEMENT, null);		}					String preview= evaluateRewrite(cu, rewrite);				buf= new StringBuffer();		buf.append("package test1;\n");		buf.append("public class E {\n");		buf.append("    public void foo() {\n");		buf.append("        i= ~10;\n");		buf.append("    }\n");		buf.append("}\n");			assertEqualString(preview, buf.toString());			}	