ppx_ts

A PPX helps binding to typescript modules
README

ppx_ts is a ReScript preprocessor, which helps generating helper types to bind to typescript modules.

Install

yarn add -D @greenlabs/ppx_ts
// bsconfig.json
"ppx-flags": [
  ...,
  "@greenlabs/ppx_ts/ppx"
],

Features

Attributes @

keyOf
@ppx_ts.keyOf
type t = {
  name: string,
  age: int
}

// automatically generated
type t_keyOf = Name | Age

// automatically generated
let t_keyToString = key =>
  switch key {
  | Name => "name"
  | Age => "age"
  }
setType(t)
module Error = {
  type t
}
@ppx_ts.setType(Error.t)
type t = {
  name: string,
  age: int
}

// automatically generated
type t_setType = {
  name: Error.t
  age: Error.t
}
toGeneric
@ppx_ts.toGeneric
type t = {
  name: string,
  age: int
}

// automatically generated
type t_toGeneric<'a> = {
  name: 'a
  age: 'a
}
partial
@ppx_ts.partial
type t = {
  name: string,
  age: int
}

// automatically generated
type t_partial = {
  name: option<string>,
  age: option<int>
}
pick
@ppx_ts.pick(["name"])
type t = {
  name: string,
  age: int
}

// automatically generated
type t_pick_name = {
  name: string,
}
omit
@ppx_ts.omit(["name"])
type t = {
  name: string,
  age: int
}

// automatically generated
type t_omit_name = {
  age: int,
}

Extension %

keyOf
module Error = {
  type t = {
    name: string,
    age: int
  }
}

@spice // attributes are available
type t1 = %ppx_ts.keyOf(Error.t) // type t1 = Name | Age

// automatically generated
let t1_keyToString = key =>
  switch key {
  | Name => "name"
  | Age => "age"
  }
setType
type t = {
  name: string,
  age: int
}

@spice // attributes are available
type t1 = %ppx_ts.setType((t, string))
// changed
type t1 = {
  name: string
  age: string
}
setTypeExceptBool
type t = {
  name: string,
  age: int,
  isKorean: bool
}

@spice // attributes are available
type t1 = %ppx_ts.setTypeExceptBool((t, string))
// changed
type t1 = {
  name: string,
  age: string,
  isKorean: bool
}
toGeneric
type t = {
  name: string,
  age: int
}

@spice // attributes are available
type t1 = %ppx_ts.toGeneric(t)
// generated
type t1<'a> = {
  name: 'a
  age: 'a
}
partial
type t = {
  name: string,
  age: int,
  isKorean: bool
}

@spice // attributes are available
type t1 = %ppx_ts.partial(t)
// generated
type t1 = {
  name: option<string>,
  age: option<int>,
  isKorean: option<bool>
}

Contribution

  1. Create a sandbox with opam

opam switch create ppx_ts 4.12.1
  1. Install dependencies

opam install . --deps-only --with-test
  1. Build

opam exec -- dune build
  1. Test

cd rescript

(install dependencies)
yarn

(build --watch)
yarn res:clean && yarn res:watch

(run test --watch)
yarn test:watch
Install
Sources
v0.1.6-opam.tar.gz
md5=6a0615247c0bf1b28b856a7b6fddaa5c
sha512=dc09a6f9cb74ca15ed35d8b16afcbc9f5b61e8d50bed49ccedd81bebca4161320c20d3664a4151fade55d77ac45c7225e37d3c56453d4cb38b862fd3b69ccf1b
Dependencies
Reverse Dependencies