source: imaps-frontend/node_modules/es-to-primitive/es5.js@ d565449

'use strict';

var toStr = Object.prototype.toString;

var isPrimitive = require('./helpers/isPrimitive');

var isCallable = require('is-callable');

// http://ecma-international.org/ecma-262/5.1/#sec-8.12.8
var ES5internalSlots = {
        '[[DefaultValue]]': function (O) {
                var actualHint;
                if (arguments.length > 1) {
                        actualHint = arguments[1];
                } else {
                        actualHint = toStr.call(O) === '[object Date]' ? String : Number;
                }

                if (actualHint === String || actualHint === Number) {
                        var methods = actualHint === String ? ['toString', 'valueOf'] : ['valueOf', 'toString'];
                        var value, i;
                        for (i = 0; i < methods.length; ++i) {
                                if (isCallable(O[methods[i]])) {
                                        value = O[methods[i]]();
                                        if (isPrimitive(value)) {
                                                return value;
                                        }
                                }
                        }
                        throw new TypeError('No default value');
                }
                throw new TypeError('invalid [[DefaultValue]] hint supplied');
        }
};

// http://ecma-international.org/ecma-262/5.1/#sec-9.1
module.exports = function ToPrimitive(input) {
        if (isPrimitive(input)) {
                return input;
        }
        if (arguments.length > 1) {
                return ES5internalSlots['[[DefaultValue]]'](input, arguments[1]);
        }
        return ES5internalSlots['[[DefaultValue]]'](input);
};