rubico/_internal/curry3.js

[a]synchronous functional programming

const __ = require('./placeholder')

// argument resolver for curry3
const curry3ResolveArg0 = (
  baseFunc, arg1, arg2,
) => function arg0Resolver(arg0) {
  return baseFunc(arg0, arg1, arg2)
}

// argument resolver for curry3
const curry3ResolveArg1 = (
  baseFunc, arg0, arg2,
) => function arg1Resolver(arg1) {
  return baseFunc(arg0, arg1, arg2)
}

// argument resolver for curry3
const curry3ResolveArg2 = (
  baseFunc, arg0, arg1,
) => function arg2Resolver(arg2) {
  return baseFunc(arg0, arg1, arg2)
}

/**
 * @name curry3
 *
 * @synopsis
 * ```coffeescript [specscript]
 * __ = Symbol('placeholder')
 *
 * curry3(
 *   baseFunc function,
 *   arg0 __|any,
 *   arg1 __|any,
 *   arg2 __|any
 * ) -> function
 * ```
 *
 * @description
 * Curry a 3-ary function.
 *
 * Note: exactly one argument must be the placeholder
 */
const curry3 = function (baseFunc, arg0, arg1, arg2) {
  if (arg0 == __) {
    return curry3ResolveArg0(baseFunc, arg1, arg2)
  }
  if (arg1 == __) {
    return curry3ResolveArg1(baseFunc, arg0, arg2)
  }
  return curry3ResolveArg2(baseFunc, arg0, arg1)
}

module.exports = curry3