Type guards

[Ithalica]

Is it possible to write C# code to generate TypeScript type guards?

My case if the following:

export interface IBaseClass
{
	Id: number;
	Name: string;
}
export interface IFirstClass extends IBaseClass
{
	SomeProperty: number;
}
export interface ISecondClass extends IBaseClass
{
            SomeOtherProperty: string;
}

and wanting to use it in a method like

    doStuff(value: IBaseClass): void
    {
            if (value is IFirstClass) {
                    //Do something with value.SomeProperty 
            }
    }

I know that in order to do this, I need some type guarding code like this:

export function isFirstClass(item: IFirstClass | ISecondClass): item is IFirstClass {
    return (<IFirstClass>item).SomeProperty !== undefined;
}

Writing it, is not a big deal as such, but I wanted to know if there are any built in options to generate this so I don't have to maintain it manually when the file is updated?

[pavel-b-novikov]

Currently this feature is not supported

[pavel-b-novikov]

Well, I have re-read your request and can suggest to use such tools as Substitutions and inline type inferers