Function narrowArrayAs

narrowArrayAs<Narrow>(): <Wide extends readonly unknown[]>(
    value: Wide,
) => [Wide, readonly unknown[]] extends [readonly unknown[], Wide]
    ? Narrow
    : Narrow extends Wide ? Narrow : unknown
Provides an unchecked tuple cast constrained by assignability.
Type Parameters
- Narrow
Returns <Wide extends readonly unknown[]>(
    value: Wide,
) => [Wide, readonly unknown[]] extends [readonly unknown[], Wide]
    ? Narrow
    : Narrow extends Wide ? Narrow : unknown
Function that narrows tuple-like arrays while rejecting unconstrained arrays.
- Defined in packages/kernel/src/utils/narrow.ts:17