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Use variable declared as const as literal type #12603
Description
It would be nice to be able to use a variable declared as const as a literal type in a type annotation.
TypeScript Version: 2.0.0
Code
export const INCREMENT = 'INCREMENT';
export const DECREMENT = 'DECREMENT'
export const ADD = 'ADD';
type Action =
{ type: INCREMENT }
| { type: DECREMENT };Expected behavior:
No error, type Action is { type: 'INCREMENT' } | { type: 'DECREMENT' }.
Actual behavior:
Error: Cannot find name INCREMENT
Activity
Lenne231 commentedon Dec 1, 2016
Ok,
seems to work, but why is
const INCREMENT = 'INCREMENT';of typestringand not of typeINCREMENT?ahejlsberg commentedon Dec 1, 2016
This is fixed in 2.1 by #10676.