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

[Corbat Thomas <thomas.corbat@xxxxxx>]

Hi Ming Cheng

 

You need to actually insert/replace/remove a node through the rewriter in order to see something happening. Just creating a new break statement with a factory will not be represented anywhere. For example you could create a new declaration, through the node factory, and insert it at the beginning of the translation unit:

r.insertBefore(ast, null, newDeclaration, null);

 

You might be able to find other applications of the ASTRewrite infrastructure in the refactoring part of the UI plug-in. I hope this helps.

 

Thomas

 

 

From: cdt-dev-bounces@xxxxxxxxxxx <cdt-dev-bounces@xxxxxxxxxxx> On Behalf Of Ming Cheng
Sent: Montag, 17. Februar 2020 08:38
To: cdt-dev@xxxxxxxxxxx
Subject: [cdt-dev] how to add a statement into an empty .CPP file

 

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;

        }

    }