You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
37 lines
1.4 KiB
37 lines
1.4 KiB
import baseCreate from './_baseCreate.js'; |
|
import isObject from './isObject.js'; |
|
|
|
/** |
|
* 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; |
|
}; |
|
} |
|
|
|
export default createCtor;
|
|
|