chain (buggy)

chain.ts

const LastSymbol = Symbol();

type InitialLastType = typeof LastSymbol;

type GenerateChainArray<T extends any[], Last = InitialLastType> = T extends []
	? []
	: T extends [infer Head, ...infer Rest]
		? [
				Last extends InitialLastType ? () => Head : (arg: Last) => Head,
				...GenerateChainArray<Rest, Head>,
			]
		: [];

declare function chain<T extends any[]>(fns: GenerateChainArray<T>): boolean;