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;
|
