Typescript shallow merge multiple objects

shallowMerge.ts

type ArrShift<Arr extends any[]> = Arr extends [skip: any, ...use: infer Use]
  ? Use
  : Arr;

type ShallowMerge<Args extends any[]> =  Args extends [any, any, any, ...any] ? Args[0] & ShallowMerge<ArrShift<Args>> : Args extends [any, any] ? Args[0] & Args[1] : Args[0]

type X = ShallowMerge<[{ x: 1 }, { y: 2 }, { z: 3}, { w: 4}]>

const x = 0 as any as X
  
x.x
x.y
x.z
x.w