irreducible.js

var assert = require('./assert');
var isString = require('./isString');
var isFunction = require('./isFunction');
var forbidNewOperator = require('./forbidNewOperator');

module.exports = function irreducible(name, predicate) {

  if (process.env.NODE_ENV !== 'production') {
    assert(isString(name), function () { return 'Invalid argument name ' + assert.stringify(name) + ' supplied to irreducible(name, predicate) (expected a string)'; });
    assert(isFunction(predicate), 'Invalid argument predicate ' + assert.stringify(predicate) + ' supplied to irreducible(name, predicate) (expected a function)');
  }

  function Irreducible(value, path) {

    if (process.env.NODE_ENV !== 'production') {
      forbidNewOperator(this, Irreducible);
      path = path || [name];
      assert(predicate(value), function () { return 'Invalid value ' + assert.stringify(value) + ' supplied to ' + path.join('/'); });
    }

    return value;
  }

  Irreducible.meta = {
    kind: 'irreducible',
    name: name,
    predicate: predicate,
    identity: true
  };

  Irreducible.displayName = name;

  Irreducible.is = predicate;

  return Irreducible;
};