Extract to function in upper scope

We have Extract to function in module scope and Extract to inner function in function xxx(which is Extract to function in current scope), we should also have Extract to function in upper scope. With it, we can:

const g = 'g';
export function A() {
  const a_local = 'a';
  return function B() {
    const b_local = 'b';
    return function C() {
      const c_local = 'c';
      // the bottom will be extracted to function upper scope
      console.log(g, a_local, b_local, c_local);
      // the above will be extracted to function upper scope
    }
  }
}

After the extraction, code will be:

const g = 'g';
export function A() {
  const a_local = 'a';
  return function B() {
    const b_local = 'b';
    function newFunction(c_local: string) {
      console.log(g, a_local, b_local, c_local);
    }
    return function C() {
      const c_local = 'c';
      newFunction(c_local);
    }
  }
}

Inizia individuando le implementazioni e i test per “Extract to function in module scope” e “Extract to function in current scope”. Estendi il comportamento di refactoring esistente in modo che l’estrazione possa puntare all’ambito della funzione superiore passando le variabili degli ambiti più profondi come parametri, e aggiungi una copertura corrispondente all’esempio TypeScript.