@babel/plugin-proposal-partial-application

Example

(examples are from proposal)

  1. function add(x, y) { return x + y; }
  3. const addOne = add(1, ?); // apply from the left
  4. addOne(2); // 3
  6. const addTen = add(?, 10); // apply from the right
  7. addTen(2); // 12
  9. let newScore = player.score
  10.   |> add(7, ?)
  11.   |> clamp(0, 100, ?); // shallow stack, the pipe to `clamp` is the same frame as the pipe to `add`.

Valid Usage

  1. f(x, ?)           // partial application from left
  2. f(?, x)           // partial application from right
  3. f(?, x, ?)        // partial application for any arg
  4. o.f(x, ?)         // partial application from left
  5. o.f(?, x)         // partial application from right
  6. o.f(?, x, ?)      // partial application for any arg
  7. super.f(?)        // partial application allowed for call on |SuperProperty|

Invalid Usage

  1. f(x + ?)          // `?` not in top-level Arguments of call
  2. x + ?             // `?` not in top-level Arguments of call
  3. ?.f()             // `?` not in top-level Arguments of call
  4. new f(?)          // `?` not supported in `new`
  5. super(?)          // `?` not supported in |SuperCall|

Installation

  1. $ npm install --save-dev @babel/plugin-proposal-partial-application

Usage

Add the following line to your .babelrc file:

  1. {
  2.   "plugins": ["@babel/plugin-proposal-partial-application"]
  3. }
  1. babel --plugins @babel/plugin-proposal-partial-application script.js

Via Node API

  1. require("@babel/core").transform("code", {
  2.   plugins: ["@babel/plugin-proposal-partial-application"]
  3. });

References