如何在F中实现ISerializable#

目前使用原样的语言是不可能做到这一点的。这是可能的,我有两种方法。

第二个,我正在调查,是用

[<Protected>]

然后用 CCI

Cecil 最终得到以下代码:

首先是F中的一个属性#

开放系统

[<AttributeUsage(AttributeTargets.Method ||| AttributeTargets.Constructor, AllowMultiple=false, Inherited=true)>]
type MyProtectedAttribute() =
    inherit System.Attribute()

下面的应用程序是 :

using System;
using System.Collections.Generic;
using System.Data.Linq;
using System.Text;
using Mono.Cecil;
using Mono.Collections.Generic;
using System.IO;

namespace AddProtectedAttribute
{
    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length != 1 || args.Length != 3)
            {
                Console.Error.WriteLine("Usage: AddProtectedAttribute assembly-file.dll /output output-file.dll");
                return;
            }

            string outputFile = args.Length == 3 ? args[2] : null;

            ModuleDefinition module = null;
            try
            {
                module = ModuleDefinition.ReadModule(args[0]);
            }
            catch (Exception err)
            {
                Console.Error.WriteLine("Unable to read assembly " + args[0] + ": " + err.Message);
                return;
            }

            foreach (TypeDefinition type in module.Types)
            {
                foreach (MethodDefinition method in type.Methods)
                {
                    int attrIndex = attributeIndex(method.CustomAttributes);
                    if (attrIndex < 0)
                        continue;
                    method.CustomAttributes.RemoveAt(attrIndex);
                    if (method.IsPublic)
                        method.IsPublic = false;
                    if (method.IsPrivate)
                        method.IsPrivate = false;
                    method.IsFamily = true;
                }
            }

            if (outputFile != null)
            {
                try
                {
                    module.Write(outputFile);
                }
                catch (Exception err)
                {
                    Console.Error.WriteLine("Unable to write to output file " + outputFile + ": " + err.Message);
                    return;
                }
            }
            else
            {
                outputFile = Path.GetTempFileName();
                try
                {
                    module.Write(outputFile);
                }
                catch (Exception err)
                {
                    Console.Error.WriteLine("Unable to write to output file " + outputFile + ": " + err.Message);
                    if (File.Exists(outputFile))
                        File.Delete(outputFile);
                    return;
                }
                try
                {
                    File.Copy(outputFile, args[0]);
                }
                catch (Exception err)
                {
                    Console.Error.WriteLine("Unable to copy over original file " + outputFile + ": " + err.Message);
                    return;
                }
                finally
                {
                    if (File.Exists(outputFile))
                        File.Delete(outputFile);
                }
            }
        }

        static int attributeIndex(Collection<CustomAttribute> coll)
        {
            if (coll == null)
                return -1;
            for (int i = 0; i < coll.Count; i++)
            {
                CustomAttribute attr = coll[i];
                if (attr.AttributeType.Name == "MyProtectedAttribute")
                    return i;
            }
            return -1;
        }
    }
}

最后,用MyProtectedAttribute修饰要保护的方法,并作为后期构建步骤运行C#app。

事实上,受保护的修饰语不是强制执行,而是 recommendation

在反序列化过程中,SerializationInfo使用为此目的提供的构造函数传递给类。当对象被反序列化时,任何放置在构造函数上的可见性约束都被忽略;因此可以将类标记为public、protected、internal或private。

所以这应该有效:

[<Serializable>]
type Bounderizer =
    val mutable _boundRect : Rectangle

    new (boundRect : Rectangle) = { _boundRect = boundRect ; }
    new () = { _boundRect = Rectangle(0, 0, 1, 1); }
    private new (info:SerializationInfo, context:StreamingContext) =
        Bounderizer(info.GetValue("BoundRect", typeof<Rectangle>) :?> Rectangle)
        then
            printfn "serialization ctor"

    interface ISerializable with
        member this.GetObjectData(info, context) =
            if info = null then raise(ArgumentNullException("info"))
            info.AddValue("BoundRect", this._boundRect)

    override this.ToString() = this._boundRect.ToString()

let x = Bounderizer(Rectangle(10, 10, 50, 50))
let ms = new MemoryStream()
let f = new BinaryFormatter()
f.Serialize(ms, x)
ms.Position <- 0L
let y = f.Deserialize(ms) :?> Bounderizer
printfn "%O" y
(*
serialization ctor
{X=10,Y=10,Width=50,Height=50}
*)