用Json.net往返F#歧视工会的问题 [英] Problems roundtripping F# discriminated unions with Json.net

问题描述

我在F#中具有以下枚举

I have the following enum in F#

 type MyEnum = 
    | Value1
    | Value2
    | Value3

这是代码编译时编译器生成的内容

This is what the compiler generates when the code compiles

   [Serializable]
    [DebuggerDisplay("{__DebugDisplay(),nq}")]
    public class MyEnum : IEquatable<MyEnum>, IStructuralEquatable, IComparable<MyEnum>, IComparable, IStructuralComparable
    {
        [CompilerGenerated]
        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
        [DebuggerNonUserCode]
        public bool IsValue1 { get; }
        [CompilerGenerated]
        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
        [DebuggerNonUserCode]
        public bool IsValue2 { get; }
        [CompilerGenerated]
        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
        [DebuggerNonUserCode]
        public bool IsValue3 { get; }
        [CompilerGenerated]
        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
        [DebuggerNonUserCode]
        public int Tag { get; }
        [CompilerGenerated]
        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
        [DebuggerNonUserCode]
        public static MyEnum Value1 { get; }
        [CompilerGenerated]
        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
        [DebuggerNonUserCode]
        public static MyEnum Value2 { get; }
        [CompilerGenerated]
        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
        [DebuggerNonUserCode]
        public static MyEnum Value3 { get; }

        [CompilerGenerated]
        public override sealed int CompareTo(MyEnum obj);
        [CompilerGenerated]
        public override sealed int CompareTo(object obj);
        [CompilerGenerated]
        public override sealed int CompareTo(object obj, IComparer comp);
        [CompilerGenerated]
        public override sealed bool Equals(MyEnum obj);
        [CompilerGenerated]
        public override sealed bool Equals(object obj);
        [CompilerGenerated]
        public override sealed bool Equals(object obj, IEqualityComparer comp);
        [CompilerGenerated]
        public override sealed int GetHashCode();
        [CompilerGenerated]
        public override sealed int GetHashCode(IEqualityComparer comp);

        public static class Tags
        {
            public const int Value1 = 0;
            public const int Value2 = 1;
            public const int Value3 = 2;
        }
    }

问题 当上述枚举类型用于序列化时，该序列化要求每个属性的非静态set进行反序列化时，它将失败.实际上，我已经在RavenDB和Json.Net序列化中使用了它，并且得到了以下内容

Problem When the above enum type is used for serialization which requires non-static set for each property for deserialization, it fails. In fact I have used it with RavenDB and Json.Net serialization and I get the following

myenummember = {}

如何有效地将F#枚举类型与序列化程序一起使用?

How do I effectively make use of F# enum types with serializers ?

推荐答案

尝试使用可序列化"(Serializable)属性标记类型.另外，为模式标识符提供分配可能有助于编译器推断它是枚举，而不是求和类型可能会有所帮助.

Try marking the type with the "Serializable" attribute. Also providing assignment for the pattern identifiers might help the compiler infer that it is a enum and not a sum type might help.

[<Serializable>]
type x =
  ABC = 1
| ABE = 2

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