The
Extract Variable
refactoring puts the result of the selected expression into a variable.
It declares a new variable and uses the expression as an initializer.
The original expression is replaced with the new variable.
You can select the expression to be replaced with a variable yourself.
You can as well use
smart expression selection.
In this case CLion will help you select the desired expression.
This refactoring is also available for
JavaScript
.
Extracting variable in-place
To extract a variable using in-place refactoring, follow these steps
In the editor, select the expression to be replaced with a variable. You can do that yourself or
use the
smart expression selection
feature to let CLion help you. So, do one of the following:
Highlight the expression. Then choose Refactor | Extract | Variable
on the main menu or on the context menu.
Alternatively, pressCtrl+Alt+V.
Place the cursor before or within the expression.
Choose
Refactor | Extract Variable
on the main menu or on the context menu.
or pressCtrl+Alt+V.
In the
Expressions
pop-up menu, select the expression.
To do that, click the required expression. Alternatively, use the Up and Down arrow keys
to navigate to the expression of interest, and then press Enter to select it.
If more than one occurrence of the selected expression is found, select
Replace this occurrence only
or
Replace all occurrences
in the
Multiple occurrences found
pop-up menu.
To select the required option, just click it. Alternatively, use the
Up and Down arrow keys to navigate to the option of interest, and press
Enter
to select it.
Specify the name of the variable. Do one of the following:
Select one of the suggested names from the pop-up list. To do that, double-click the suitable
name.
Alternatively, use the Up and Down arrow keys to navigate to the name of interest, and
Enter
to select it.
Edit the name by typing. The name is shown in the box with red borders and changes as you type.
When finished, pressEnter.
If you want to apply automatic type declaration for the variable, select the Select auto
check box in the pop-up:
Note, that the IDE saves your choice as default setting for the next attempt of the Extract variable
refactoring.
