Create a new object from type parameter in generic class

I'm trying to create a new object of a type parameter in my generic class.
In my class View, I have 2 lists of objects of generic type passed as type parameters, but when I try to make new TGridView(), TypeScript says:


Could not find symbol 'TGridView

This is the code:

module AppFW {
    // Represents a view
    export class View {
        // The list of forms 
        public Forms: { [idForm: string]: TFormView; } = {};

        // The list of grids
        public Grids: { [idForm: string]: TGridView; } = {};

        public AddForm(formElement: HTMLFormElement, dataModel: any, submitFunction?: (e: SubmitFormViewEvent) => boolean): FormView {
            var newForm: TFormView = new TFormView(formElement, dataModel, submitFunction);
            this.Forms[formElement.id] = newForm;
            return newForm;
        }

        public AddGrid(element: HTMLDivElement, gridOptions: any): GridView {
            var newGrid: TGridView = new TGridView(element, gridOptions);
            this.Grids[element.id] = newGrid;
            return newGrid;
        }
    }
}

Can I create objects from a generic type?

Because the compiled JavaScript has all the type information erased, you can't use T to new up an object.

You can do this in a non-generic way by passing the type into the constructor.

class TestOne {
    hi() {
        alert('Hi');
    }
}

class TestTwo {
    constructor(private testType) {

    }
    getNew() {
        return new this.testType();
    }
}

var test = new TestTwo(TestOne);

var example = test.getNew();
example.hi();

You could extend this example using generics to tighten up the types:

class TestBase {
    hi() {
        alert('Hi from base');
    }
}

class TestSub extends TestBase {
    hi() {
        alert('Hi from sub');
    }
}

class TestTwo {
    constructor(private testType: new () => T) {
    }

    getNew() : T {
        return new this.testType();
    }
}

//var test = new TestTwo(TestBase);
var test = new TestTwo(TestSub);

var example = test.getNew();
example.hi();

Stack Overflow Q#17382143, score: 124