Create a Generic type interface with some specific interface

Question

I don't really know the terms to search on google for this, so it might be duplicated.

I have an interface that looks like

export interface SolidOptions<T> { position: Cartesian3; options?: T; }

now, I want this T to be ONLY of 3 types : CylinderOptions | RectangleOptions | PolygoneOptions

I do NOT want this solution :

export interface SolidOptions<T> { position: Cesium.Cartesian3; options?: CylinderOptions | RectangleOptions | PolygoneOptions; }

the reason why is I want to use this as follow :

 static generateCylinder = (options: SolidOptions<CylinderOptions>)=> { } static generateRectangle = (options: SolidOptions<RectangleOptions >)=> { } static generatePolygon = (options: SolidOptions<PolygoneOptions>)=> { }

and not having the abilities to pass the wrong type to the wrong function.

Aleksey L. · Accepted Answer · 2020-11-28 07:55:30Z

3

You can define constraint on generic type parameter:

export interface SolidOptions<T extends CylinderOptions | RectangleOptions | PolygoneOptions> { position: Cartesian3; options?: T; }

answered Nov 28, 2020 at 7:55

Aleksey L.

38.4k11 gold badges86 silver badges90 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Crocsx Over a year ago

Actually I knew it, but it was triggering me that I could pass anything to it. But yes in the end, if I ignore the other properties it doesn't matter in the end.

Braden Rockwell Napier Over a year ago

You would only be able to pass the provided values in the extends - any values which matches those types. If those types are too general then it may allow more than you'd like.

Collectives™ on Stack Overflow

Create a Generic type interface with some specific interface

1 Answer 1

2 Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Related