Generate definitions
When a function's declaration exists in a class or a namespace but has no implementation yet, you can create definition (implementation) for that function using the Generate definition feature.
Generate a function definition
In the editor, place caret at the desired position.
To access the Generate definition action, do one of the following:
On the main menu, choose or press Alt+Insert, or choose and select Generate Definitions in the dialog that opens.
Right-click the mouse and select Generate from the context menu. In the dialog that opens select the Generate Definitions option.
Press Control+Shift+D.
In the dialog that appears, select the functions to generate definition for:
Click OK to apply.
The function's definition appears starting from the caret position. In case when the caret is placed inside a class, the functions body is added to the existing declarations.