Jakt IntelliJ Plugin

A fully-featured plugin for the Jakt programming language.

Features

• Highlighting
  • Fully-configurable via a Color Scheme page
  • Material-like defaults for Darcula
  • Semantic-based. Examples:
    • Static method calls vs instance method calls
    • Mutable vs immutable local variables
• Validation
  • Flexible BNF-based language description detects parsing errors early
  • Displays type-checking and advanced parsing errors from the Jakt compiler
• Completions
  • Completes after plain identifiers, field access expressions, and namespace qualifiers
  • Intelligent completions (example: not suggesting static methods for a field access expression)
  • Function template completion

    
  • Completes prelude types/functions
• Intentions
  • Basic intention support (currently only has one very simple intention)
• Resolution
  • Two-way resolution (ref -> decl, decl -> all refs)
  • Sees through import statements
  • Complex resolution support. Example:
    • Function argument labels resolve to the respective parameter
    • Function parameters resolve to their usages in the function body (and not the aforementioned argument labels)
    • Shorthand enum names in match cases and is expressions
  • Type declaration from identifiers when ctrl-clicking

    
• Rename refactoring
  • Works for any identifier that supports resolution (declaration, local variable, imports, etc)
• Run Configurations
  • Gutter icons for main function allow easily running scripts with custom arguments

Contributing

There is no special setup needed for the project; simply open it in IntelliJ, and run the Test task for tests, and the Run IDE for UI Tests to launch a clean version of IntelliJ with the plugin installed.

The buildPlugin task will build the plugin to build/libs, which can be installed manually in the plugins tab in settings.

TODO (in order of importance)

• GitHub Actions: Automatically run tests for commits and PRs
• Grammar
  • Improve parsing errors
  • Implement error recovery (currently highlighting breaks for invalid files)
• Complex refactoring (move/delete)
• Most of the features mentioned in the IntelliJ Custom Language Support tutorial