CLion 2020.2 Help

Refactoring

Refactoring is a process of improving your source code without creating a new functionality. Refactoring helps you keep your code solid , dry, and easy to maintain.

Invoke refactoring

  1. Select an item to refactor. You can select a file/folder in the Project tool window or expression/symbol in the editor.

  2. Press Ctrl+Alt+Shift+T to open a list of refactorings that can be selected.

    refactor this popup
    Alternatively, you can use a keyboard shortcut for a specific refactoring.

If you need to undo your refactoring, press Ctrl+Z.

Preview refactoring changes

For some refactorings, CLion lets you preview changes before applying them.

  1. To see potential changes (the list of usages where the refactoring will be performed), click Preview in the Refactoring Preview dialog.

    cl refactoring dialog png

  2. Check the changes that are going to be made in the Find tool window. You can exclude Delete or remove Ctrl+X changes that you consider unnecessary.

    cl refactoring preview png

  3. Click Do Refactor to proceed with the changes.

Resolve conflicts

When CLion encounters problems with your refactoring, it opens a dialog with the list of conflicts and their brief descriptions.

cl refactoring conflicts dialog png
  • Click Continue to ignore the problem and proceed to open the preview in the Find tool window.

  • Click Show Conflicts in View to open the conflict entries in the Find tool window and deal with them further.

    For example, you can try to exclude an entry from refactoring by pressing Delete or click Cancel and return to the editor.

    cl refactoring conflicts toolwindow png

    Configure refactoring settings

    1. In the Settings/Preferences dialog Ctrl+Alt+S, select Editor | Code Editing.

    2. On the Code Editing page, in the Refactorings section, adjust the refactoring options and click OK.

    Safe Delete Alt+DeleteMakes sure that you do not delete files that are referenced in your source code. Safe delete
    Copy/MoveF5/ F6Copies/Moves an element.Move and Copy
    Extract MethodCtrl+Alt+MThese refactoring actions help you reduce the code duplication. Extract function
    Extract ConstantCtrl+Alt+C Declares a new constant and initializes it with the selected expression. Extract constant
    Extract ParameterCtrl+Alt+PAdds a new parameter to a method declaration and updates the Function calls accordingly. Extract parameter
    Introduce Variable Ctrl+Alt+V Declares a new variable and initializes it with the selected expression. Extract/Introduce variable
    RenameShift+F6Renames an element.Rename
    InlineCtrl+Alt+NInlines an element. Acts as opposite of extracting.Inline
    Change signatureCtrl+F6Changes the call signature of a methodor class. Change signature
    Last modified: 19 October 2020