Postfix completion

Enable and configure postfix completion

• In the Settings dialog (Ctrl+Alt+S), open Editor | General | Postfix Completion and select the Enable postfix completion checkbox.

• Enable or disable postfix templates for the selected language.

• Set the Tab, Space, or Enter key to expand postfix templates.

Transform a statement with a postfix

1. Type an expression and then type a postfix after a dot. For example, type .if.

2. Press Tab.

   fn foo(value: bool) { value.if }

   fn foo(value: bool) { if value {} }

   The initial expression gets wrapped with an if statement.

Postfix completion options are shown as part of the basic completion suggestion list. To see a full list of postfix completions applicable in the current context, press Ctrl+J.

Edit a postfix template name

You can edit the predefined postfix templates, for example, to replace a long key with a shorter one, or to expand the list of applicable expression types.

1. Press Ctrl+Alt+S to open settings and then select Editor | General | Postfix Completion.

2. Double-click a template name in the tree or click the icon above the list of templates and edit it as required.

   

Create custom postfix templates

1. Press Ctrl+Alt+S to open settings and then select Editor | General | Postfix Completion.

2. Click the Add button () on the toolbar and select Rust.

   

3. In the Create New Template dialog that opens, specify Key, a combination of symbols after the dot that will invoke the template.

4. Select which expression types the new template will be applicable to, and type the target expression in the following format: $EXPR$ <target_expression>, for example, $EXPR$ =!null.

5. To have RustRover automatically transform the topmost applicable expression when the template is invoked, select the Apply to the topmost expression checkbox.

   Otherwise, if the checkbox is cleared, RustRover will prompt you to choose the expression when you invoke the template.

Share postfix templates

You can share postfix templates in the following ways:

• Use the Backup and Sync plugin to synchronize templates and their settings between IDEs.

• Manually export postfix templates from one IDE and import them into another IDE.