Tokenising failure on parenthesis-wrapped object literal's type assertion operators `as keyof typeof`

JavaScript and TypeScript Nightly version: 5.3.0-dev.20231015

Code

This is the minimal and possible code for compare and constrast.
The example might not cover all posibilities that leads to this issue.

type A = { a: "", b: "" }
const a = { a: "", b: "" }

const c = ({
    key: a.a, label: a.b[a.a as keyof typeof a.b]
})

const d = (
    {
        key: a.a, label: a.b[a.a as keyof typeof a.b]
    })

const e =
    { key: a.a, label: a.b[a.a as keyof typeof a.b] }

const f =
{
    key: a.a, label: a.b[a.a as keyof typeof a.b]
}

When the object literal is going to be written like d, the inner operator as keyof typeof is tokenised as variable.parameter.ts or (tsx), but not keyword.*.

Empieza inspeccionando los archivos de gramática TypeScript TextMate del repositorio y reproduce los ejemplos proporcionados en el resaltador de sintaxis del editor correspondiente. Compara el resaltado de as keyof typeof en el literal de objeto envuelto entre paréntesis con los demás ejemplos; se considera terminado cuando esos operadores reciben scopes de keyword en lugar de variable.parameter.ts o su equivalente de TSX.