using System.Collections.Generic; using System.Diagnostics.CodeAnalysis; using System.Runtime.CompilerServices; using System.Runtime.InteropServices; using System.Text.Json.Serialization.Metadata; namespace System.Text.Json.Serialization.Converters { internal sealed class FSharpSetConverter<TSet, TElement> : IEnumerableDefaultConverter<TSet, TElement> where TSet : IEnumerable<TElement> { private readonly Func<IEnumerable<TElement>, TSet> _setConstructor; [System.Diagnostics.CodeAnalysis.RequiresUnreferencedCode("Uses Reflection to access FSharp.Core components at runtime.")] public FSharpSetConverter() { _setConstructor = FSharpCoreReflectionProxy.Instance.CreateFSharpSetConstructor<TSet, TElement>(); } protected override void Add([In] [System.Runtime.CompilerServices.IsReadOnly] TElement value, ref ReadStack state) { ((List<TElement>)state.Current.ReturnValue).Add(value); } protected override void CreateCollection(ref Utf8JsonReader reader, ref ReadStack state, JsonSerializerOptions options) { state.Current.ReturnValue = new List<TElement>(); } protected override void ConvertCollection(ref ReadStack state, JsonSerializerOptions options) { state.Current.ReturnValue = _setConstructor((List<TElement>)state.Current.ReturnValue); } } }