Type alias GetFunctionType<T, TPosition>

GetFunctionType<T, TPosition>: TPosition extends "auto"
    ? T extends [infer TArg, ...(infer TRest)]
        ? TArg extends ((...args) => any)
            ? TArg
            : GetFunctionType<TRest>
        : never
    : TPosition extends keyof T
        ? T[TPosition] extends AnyFunction
            ? T[TPosition]
            : never
        : never

GetFunctionType<T, TPosition> Extracts a function type from a tuple T at a specific position (TPosition). If TPosition is 'auto', the type of the first function in the tuple is returned. If TPosition is a number, the function type at that index is returned.

Type Parameters

  • T

    A tuple type (typically the arguments of a function).

  • TPosition extends number | "auto" = 0

    The position in the tuple to extract the function type from ('auto' for the first function type, or a number for a specific position).

Returns

The function type at the specified position in the tuple T.

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