将 Golang 延迟概念实现到 Javascript 中

package main

import "fmt"


func main() {
    fmt.println("start")
    defer fmt.println("defer 1")
    defer fmt.println("defer 2")
    fmt.println("end")
}

start
end
defer 2
defer 1

class deferer {
  static stack = [];
  static wrapped = false;
  static defer(fn) {
    this.stack.push(fn);
    if (!this.wrapped) {
        throw new error("can't call defer wihtout wrapping the function with deferer.wrapper")
    }
  }

  static execute() {
    while (this.stack.length > 0) {
      const fn = this.stack.pop();
      try {
        fn();
      } catch (err) {
        throw new error('error in deferred function:', err);
      } 
    }
    this.wrapped = false;
  }

  static wrapper = (cp) => (...args) => {
        if(this.wrapped) throw new error("nested deferers are not supported");
        this.wrapped = true;
        try {
         const v = cp(...args)
         this.execute()
         return v;
        } finally {
          this.wrapped = false;
        }

  }

}

const mydeferedfunction =deferer.wrapper((a, b, c) => {
  console.log("start of function", a, b, c);

  deferer.defer(() => console.log("deferred: function 1"));
  deferer.defer(() => console.log("deferred: function 2"));

  console.log("end of function", a, b, c);
});

mydeferedfunction(8,8,8)

Start of function 8 8 8
End of function 8 8 8
Deferred: Function 2
Deferred: Function 1