[C#] 뇌절) await 미루기, 선언적 finally 처리, c# defer

[나라뜨(skfhddlg)]

IAsyncDisposable을 응용해 golang의 defer같은 스타일을 구현.

만들다보니 나중에 처리, 나중에 대기나 잡다한 비전을 일단 한객체로 우겨넣어버리니 부조리한 처리만 많아짐.

정리를 좀 하면 될지 모르겠음

struct Defer : IAsyncDisposable, IDisposable

{

    Func<ValueTask> d;

    ValueTask IAsyncDisposable.DisposeAsync() => d();

    void IDisposable.Dispose() => d().AsTask().Wait();

    public Defer(ValueTask vt) : this(fvt: () => vt){}

    public Defer(Task t) : this(fvt: () => new(t)){}

    public Defer(Action a) : this(fvt: () => { a(); return ValueTask.CompletedTask; }){}

    public Defer(Func<Task> f) : this(fvt: () => new(f())) {}

    public Defer(Func<ValueTask> fvt) => d = fvt;

    public static implicit operator Defer(ValueTask _) => new(vt: _);

    public static implicit operator Defer(Task _) => new(t: _);

    public static implicit operator Defer(Action _) => new(a: _);

    //public static implicit operator Defer(Func<Task> _) => new(f: _);

    public static implicit operator Defer(Func<ValueTask> _) => new(fvt: _);

}