Function constructor

test/embind/embind.test.js:697–701

(i, s, argument)

        test("can invoke constructors with arguments", function() {
            function constructor(i, s, argument) {
                this.i = i;
                this.s = s;
                this.argument = argument;
            }
            constructor.prototype.method = function() {
                return this.argument;
            };