Narrow doesn't work on template literal types

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🐞 Bug Report

Reproduce the bug

declare const foo: <T extends number>(value: Narrow<`${T}`>) => void

foo('12')

Screenshots

Additional context

trying to make a toNumber function that knows the value at compiletime

const toNumber = <T extends number>(value: Narrow<`${T}`>): T => Number(value) as T

const value: 12 = toNumber('12') //TS2322: Type 'number' is not assignable to type '12'.

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may be a limitation in the compiler related to microsoft/TypeScript#42938