Bug Report

🔎 Search Terms

enum const initializer type

🕗 Version & Regression Information

• I was unable to test this on prior versions because this feature is only supported starting from TS 5.0

⏯ Playground Link

Playground link with relevant code

💻 Code

const Const1 = 10;
const enum Enum1 {
    First = Const1,
    Second
}

const Const2: 10 = 10;
const enum Enum2 {
    First = Const2,
    Second
}

const Const3 = 10 as const;
const enum Enum3 {
    First = Const3,
    Second
}

const Const4: number = 10;
const enum Enum4 {
    First = Const4,
    Second
}

🙁 Actual behavior

The first enum is valid. For all the other ones, TS reports const enum member initializers must be constant expressions.

🙂 Expected behavior

At least the second and third enums should be valid, because their initializer is a reference to a const variable with a fixed type. Maybe also the fourth one could work, but I wouldn't be surprised if it doesn't.