Flix for Visual Studio Code

The official Visual Studio Code extension for the Flix Programming Language (flix.dev).

Flix is a next-generation reliable, safe, concise, and functional-first programming language.

We aim to have world-class Visual Studio Code support and our extension is based on the real Flix compiler infrastructure.

Features

Syntax Highlighting
- Code highlighting for *.flix files. This work best with the official vscode theme.
Diagnostics
- Compiler error messages.
Auto-complete
- Auto-complete as you type.
Snippets
- Auto-complete common code constructs.
Type and Effect Hovers
- Hover over any expression to see its type and effect.
- Hover over any local variable or formal parameter to see its type.
- Hover over any function to see its type signature and documentation.
- Hover over any first-class Datalog constraint expression to see its stratification.
Jump to Definition
- Jump to the definition of any function.
- Jump to the definition of any local variable or formal parameter.
- Jump to the definition of any enum case.
Find References
- Find all references to a function.
- Find all references to a local variable or formal parameter.
- Find all references to an enum case.
Symbols
- List all document symbols.
- List all workspace symbols.
Rename
- Rename local variables or formal parameters.
- Rename functions.
Code Lenses
- Run main from within the editor.
- Run benchmarks and unit tests from within the editor.
Highlight
- Highlights semantically related symbols.
Semantic Tokens
- Additional code highlighting hints provided by the compiler.

Install the Flix Visual Studio Code extension.
- The extension will automatically download the Flix compiler.

Alternative (for advanced users):

Upon startup, the extension with look for a flix.jar compiler in the project root and use that if available.
- This can be used to run a nightly (or custom-built) version of the compiler.

Information about running, debugging, and packaging the extension is available in DEV.md.