'use strict';

var value = require('./valid-value')

  , defineProperty = Object.defineProperty
  , getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor
  , getOwnPropertyNames = Object.getOwnPropertyNames;

module.exports = function (target, source) {
	var error;
	target = Object(value(target));
	getOwnPropertyNames(Object(value(source))).forEach(function (name) {
		try {
			defineProperty(target, name, getOwnPropertyDescriptor(source, name));
		} catch (e) { error = e; }
	});
	if (error !== undefined) throw error;
	return target;
};