[cdt-dev] how to add a statement into an empty .CPP file

[Ming Cheng <chengm349@xxxxxxxxxxx>]

private void buildMainFunction(IFile file) {

        try {

            IASTTranslationUnit ast = CurrentGui.getInstance().getGui().getAST(file);

            ASTRewrite r = ASTRewrite.create( ast );

            IASTBreakStatement breakStatement = ast.getASTNodeFactory().newBreakStatement();

            Change c = r.rewriteAST();

            c.perform(new NullProgressMonitor());            

        } catch (CoreException e) {

            log.error(e.getMessage());

        }

    }

PS. file was created successfully. But after this buildMainFunction() call, the file is still empty. If I try ASTRewrite replace(), my program will complain org.umlet.plugin null.

@Override

    public IASTTranslationUnit getAST(IFile file) {

        try {

            ITranslationUnit tu= (ITranslationUnit) CoreModel.getDefault().create(file);

            IASTTranslationUnit ast = tu.getAST();

            return ast;

        } catch (CoreException e) {

            log.error(e.getMessage());

            return null;

        }

    }