# tree-sitter-kotlin

**Repository Path**: mirrors_sourcegraph/tree-sitter-kotlin

## Basic Information

- **Project Name**: tree-sitter-kotlin
- **Description**: Kotlin grammar for Tree-sitter
- **Primary Language**: Unknown
- **License**: MIT
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 1
- **Created**: 2025-02-16
- **Last Updated**: 2025-12-21

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# Kotlin Grammar for Tree-sitter

[![Build](https://github.com/fwcd/tree-sitter-kotlin/actions/workflows/build.yml/badge.svg)](https://github.com/fwcd/tree-sitter-kotlin/actions/workflows/build.yml)
[![NPM](https://img.shields.io/npm/v/tree-sitter-kotlin)](https://www.npmjs.com/package/tree-sitter-kotlin)
[![crates.io](https://img.shields.io/crates/v/tree-sitter-kotlin)](https://crates.io/crates/tree-sitter-kotlin)

[Kotlin](https://kotlinlang.org) language grammar for [Tree-sitter](http://tree-sitter.github.io/tree-sitter/). You can try it out directly [on the web](https://fwcd.github.io/tree-sitter-kotlin).

![Icon](Icon128.png)

The grammar is based on the [official language grammar](https://kotlinlang.org/docs/reference/grammar.html).

## Project Structure

| File | Description |
| ---- | ----------- |
| grammar.js | The Tree-sitter grammar |
| grammar-reference.js | A direct translation of the Kotlin language grammar that is, however, ambiguous to Tree-sitter |
| src | The generated parser |

## Setup

>`npm install`

## Development

### Compilation

To (re-)compile the grammar, run:

>`npm run generate`

Note that the grammar is written completely in JavaScript (`grammar.js`), the other source files are generated by `tree-sitter`.

### Testing

To run the unit tests, run:

>`npm run test`

It is also helpful to run the parser on a real Kotlin project's source files.

```shell
./node_modules/.bin/tree-sitter parse "/path/to/some/project/**/*.kt"  --quiet --stat
```

## WebAssembly

### Compilation

First make sure to have [Emscripten](https://emscripten.org/) installed. If you use Homebrew, you can `brew install emscripten`. Then run:

>`npm run build-wasm`

### Playground

After compiling the grammar to WebAssembly, you can invoke

>`npm run playground`

to launch an interactive editing environment that displays the parsed syntax tree on-the-fly in the browser. You can also view a deployed version of this playground [on the web](https://fwcd.github.io/tree-sitter-kotlin).

![Screenshot](playground-screenshot.png)

## Documentation

More documentation on how to create Tree-sitter grammars [can be found here](https://tree-sitter.github.io/tree-sitter/creating-parsers).

## See also

* [Kotlin Language Server](https://github.com/fwcd/kotlin-language-server) for code completion, diagnostics and more
* [Kotlin Debug Adapter](https://github.com/fwcd/kotlin-debug-adapter) for JVM debugging support