mizchi / mints Goto Github PK

View Code? Open in Web Editor NEW

101.0 3.0 1.0 1.56 MB

lightweight typescript compiler

HTML 0.21% TypeScript 98.45% JavaScript 1.13% Shell 0.21%

typescript parser compiler parser-generator

mints's Introduction

mints: tiny typescript compiler

7.8kb

packages/mints: tiny typescript compiler
packages/pargen: parser generator
packages/pargen-tokenized: parser generator for tokens (mints use this)
packages/playground: mints web playground

Demo https://mints-playground.netlify.app/

LICENSE

MIT

mints's People

Contributors

Stargazers

Watchers

Forkers

naoki-tomita

mints's Issues

String Enums may wrong transform

Source

enum Keys {
  A = "Aaa",
}

console.log(`Keys.A: ${Keys.A}`);
console.log(`Keys.Aaa: ${Keys.Aaa}`);

Compare mints and Babel

Transformed with mints

const Keys={A:"Aaa","Aaa":"A",};console.log(`Keys.A: ${Keys.A}`);console.log(`Keys.Aaa: ${Keys.Aaa}`);

console output

Keys.A: Aaa
Keys.Aaa: A

Transformed with Babel

"use strict";

var Keys;

(function (Keys) {
  Keys["A"] = "Aaa";
})(Keys || (Keys = {}));

console.log(`Keys.A: ${Keys.A}`);
console.log(`Keys.Aaa: ${Keys.Aaa}`);

console output

Keys.A: Aaa
Keys.Aaa: undefined

What is this for?

Just wondering, what did you build this for?

I went looking for a tiny TS compiler that would be small and fast enough to run in the browser - perhaps in a service worker.

Is that what you're after as well?

I wonder, esbuild being the fastest thing out there, would it be possible to pull just the parser and transformer from it's libraries, build a WASM module using tinygo, and get something very fast and small?

With those compile times, and if it runs on a separate thread from the UI thread (in a service worker) it might not actually impact load times substantially.

You might not need to write an entirely new parser. Seems like a lot of work. So much hard work went into esbuild already, and expect it might be both small and fast if built with tinygo, as the parser itself is hand written and small.

What do you think?

The result of `!==` is wrong

I saw a parse failure, so I am reporting it.
If there is a !== or != in the code, the output will be incorrect.

when use `!==`

input

if(hoge !== null){
  return 0;
}

output

if(hoge == null){
  return 0;
}

when use `!=`