antlr4ts-deno

Deno port of antlr4ts.
Runtime only; not including compiler.

Use (Deno)

Config Import Maps

import_map.json

{
    "imports": {
        "antlr4ts": "https://denopkg.com/jabo-lang/antlr4ts-deno/mod.ts",
        "antlr4ts/": "https://denopkg.com/jabo-lang/antlr4ts-deno/src/"
    }
}

.vscode/settings.json (for vscode users)

{
    "deno.importMap": "./import_map.json"
}

Convert Lexer/Parser Files

convert.ts

Change import path. ex) "antlr4ts/RuleContext" -> "antlr4ts/RuleContext.ts"

const output = "src/parser/dist" // ANTLR output directory
for await (const dirEntry of Deno.readDir(output)) {
    if (dirEntry.name.endsWith(".ts")) {
        console.log(`Converting '${dirEntry.name}'`)

        const path = output + dirEntry.name
        const script = await Deno.readTextFile(path)
        const denoScript = script.replaceAll(/import (.*) from "(.*)"/g, `import $1 from "$2.ts"`)
        Deno.writeTextFile(path, denoScript)
    }
}

deno run -A convert.ts

Use Your Grammar in TypeScript

See antlr4ts README.

import {
    ANTLRInputStream,
    CommonTokenStream,
} from "antlr4ts"

import { MainLexer } from "./dist/MainLexer.ts"   // Your lexer
import { MainParser } from "./dist/MainParser.ts" // Your parser

let inputStream = new ANTLRInputStream("text")
let lexer = new MainLexer(inputStream)
let tokenStream = new CommonTokenStream(lexer as any)
let parser = new MainParser(tokenStream)

let tree = parser.prog()  // Your entry point

console.log(tree)