Coding Assistance in F#
Last modified: 24 November 2022Enable the F# Support plugin
This functionality relies on the F# Support plugin, which is bundled and enabled in JetBrains Rider by default. If the relevant features aren't available, make sure that you didn't disable the plugin.
Press Ctrl+Alt+S to open the IDE settings and select Plugins.
Open the Installed tab, find the F# Support plugin, and select the checkbox next to the plugin name.
Syntax highlighting
F# syntax highlighting uses the default font and color scheme that is applied to all languages and currently cannot be customized specifically for F#.
Default syntax highlighting:
Configure default color and font settings:
Press Ctrl+Alt+S or choose File | Settings (Windows and Linux) or JetBrains Rider | Preferences (macOS) from the menu , then choose Editor | Color Scheme on the left.
Change the settings under the General and Language Defaults nodes.
Code completion
Code Completion features help you write code faster by providing a set of items to complete based on surrounding context. For more information, see Code completion (IntelliSense).
Currently, only Basic code completion is supported in F#. It suggests namespaces, types, methods, fields, properties, and so on as you type.
You can see the entire list of suggestions by placing the caret at the position where you're going to type your code (or on an existing member) and press Ctrl+Space.
Code formatting
JetBrains Rider can reformat existing code in a selected F# file, fixing the following spacing violations:
space after comma
space after semicolon
space around delimiter
space before argument
space before colon
inconsistent indents
Open the file you want to reformat, then go to Code | Reformat Code or just press Ctrl+Alt+Enter.
Here is an example of a code fragment reformatted with JetBrains Rider.
Before:
After:
