@@can.new(...args)

The @@can.new symbol points to a function that constructs and returns a new instance object. It is left to the implementation to create the object, set the prototype chain, and handle any arguments passed to the constructor.

function constructor() {}
constructor.prototype = { foo: "bar" };

// ES6 rest and spread params used below to be concise.
constructor[canSymbol.for("can.new")] = function(...args) {
    return new this(...args);
};

var prototype = { baz: "quux" };
prototype[canSymbol.for("can.new")] = function(props) {
    return Object.create(this, props);
};