@fazelstudio/codemirror-lang-scala

This package implements Scala (.scala, .sc) language support for the CodeMirror code editor: a full Lezer grammar covering Scala 3 features including classes, traits, objects, enums, case classes, pattern matching, for-comprehensions, string interpolation, XML literals, generics with variance, union/intersection types, type lambdas, contextual abstractions (given/using), extension methods, opaque types, and Scaladoc documentation comments — with syntax highlighting compatible with any CodeMirror 6 theme.

This code is released under an MIT license.

Features

• Full Scala 3 syntax support (including optional braces / significant indentation)
• Pattern matching with case classes, guards, alternatives, and bindings
• String interpolation (s"...", f"...", raw"...")
• XML literals
• Generics with variance annotations (+T, -T)
• Union types (|) and intersection types (&)
• Type lambdas ([X] =>> List[X])
• Contextual abstractions (given, using)
• Extension methods
• Opaque type aliases
• Scaladoc documentation comments

Usage

import { EditorView, basicSetup } from "codemirror"
import { scala } from "@fazelstudio/codemirror-lang-scala"

new EditorView({
  parent: document.body,
  doc: `@main def run(): Unit = println("Hello, Scala!")`,
  extensions: [basicSetup, scala()],
})

API

scala(config?) → LanguageSupport

Create a Scala language support extension.

scalaLanguage: LRLanguage

The underlying LRLanguage instance.

Known limitations

• Smart-cast/type-inference analysis is out of scope — this package only provides syntax highlighting and parsing, not type checking.
• Scaladoc tag content is highlighted as part of the doc comment block, not parsed into structured fields, in v0.1.
• XML literal parsing supports basic tags but may have limitations with complex nested expressions.