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export type UnarrayIfOnlyHead<T extends readonly any[]> = T extends [
infer Head,
infer Next
]
? T
: T extends [infer Head]
? Head
: T;
type ARR_EQUAL_SENTINEL = { __arrEq: true };
export type ArrayEqual<
T extends readonly any[],
Last = ARR_EQUAL_SENTINEL
> = T extends [infer Head, ...infer Tail]
? Last extends ARR_EQUAL_SENTINEL
? ArrayEqual<Tail, Head>
: Head extends Last
? Last extends Head
? ArrayEqual<Tail, Head>
: false
: false
: true;
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