| var baseCreate = require('./_baseCreate'), |
| isObject = require('./isObject'); |
| |
| /** |
| * Creates a function that produces an instance of `Ctor` regardless of |
| * whether it was invoked as part of a `new` expression or by `call` or `apply`. |
| * |
| * @private |
| * @param {Function} Ctor The constructor to wrap. |
| * @returns {Function} Returns the new wrapped function. |
| */ |
| function createCtor(Ctor) { |
| return function() { |
| // Use a `switch` statement to work with class constructors. See |
| // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist |
| // for more details. |
| var args = arguments; |
| switch (args.length) { |
| case 0: return new Ctor; |
| case 1: return new Ctor(args[0]); |
| case 2: return new Ctor(args[0], args[1]); |
| case 3: return new Ctor(args[0], args[1], args[2]); |
| case 4: return new Ctor(args[0], args[1], args[2], args[3]); |
| case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]); |
| case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]); |
| case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]); |
| } |
| var thisBinding = baseCreate(Ctor.prototype), |
| result = Ctor.apply(thisBinding, args); |
| |
| // Mimic the constructor's `return` behavior. |
| // See https://es5.github.io/#x13.2.2 for more details. |
| return isObject(result) ? result : thisBinding; |
| }; |
| } |
| |
| module.exports = createCtor; |