traph.macro v0.1.0

traph.macro

JS Babel macro for Object transformation graph

A babel-macros version of traph, a functional utility to transform Objects easily, leveraging object getters and graphs.

The performance of the macro should be greatly improved over the performance of the function.

Install

$ npm install traph.macro

Usage

Assuming babel-macros is installed and configured, the traph macro has the same usage of the traph function.

Input:

import traph from 'traph.macro'

const stats = traph({
  mean: (i, o) => i.values.reduce((a, b) => a + b) / o.count,
  count: (i, o) => i.values.length,
})

const transformed = stats({ values: [1,2,3,4,5,6,7] })

Output:

const stats = function (i) {
  return Object.create({
    get count() {
      const o = this
      const v = i.values.length
      Object.defineProperty(this, 'count', { value: v, enumerable: true })
      return v
    },

    get mean() {
      const o = this
      const v = i.values.reduce(sum) / o.count
      Object.defineProperty(this, 'mean', { value: v, enumerable: true })
      return v
    }
  })
}

const transformed = stats({ values: [1,2,3,4,5,6,7] })

API

The API is identical to the traph function, with the exception of the lazy mode. The mode is always lazy now.

License

MIT © caesarsol