延续传球风格

Question

如何将打字稿中的这些过程转换为CPS格式？假设该函数在树上传递并取最左边的节点。

export const leftMostEven1 = (atree: Tree): number => {
  if (isTreeLeaf(atree)){
    if (atree.value%2==0)
          return atree.value;
       return -1;
  }
 else if(isTreeNode(atree)) {   
  for (let i =0 ; i < atree.children.length;i ++){
     let a =  leftMostEven1(atree.children[i]);
     if (a!=-1) return a;
  } 
 }
 return -1;  
}

我开始了：

const leftMostEven$ = <T1, T2>(atree: Tree,
                           succ: ((x:number) => T1),
                           fail: (() => T2)): (T1 | T2) =>

fail();