using System.Collections.Generic; using System.Runtime.CompilerServices; using System.Runtime.InteropServices; namespace System.Text.Json.Serialization.Converters { internal class ImmutableEnumerableOfTConverter<TCollection, TElement> : IEnumerableDefaultConverter<TCollection, TElement> where TCollection : IEnumerable<TElement> { internal sealed override bool CanHaveMetadata => false; internal override bool SupportsCreateObjectDelegate => false; internal sealed override bool IsConvertibleCollection => true; protected sealed override void Add([In] [System.Runtime.CompilerServices.IsReadOnly] TElement value, ref ReadStack state) { ((List<TElement>)state.Current.ReturnValue).Add(value); } protected sealed override void CreateCollection(ref Utf8JsonReader reader, [System.Runtime.CompilerServices.ScopedRef] ref ReadStack state, JsonSerializerOptions options) { state.Current.ReturnValue = new List<TElement>(); } protected sealed override void ConvertCollection(ref ReadStack state, JsonSerializerOptions options) { Func<IEnumerable<TElement>, TCollection> func = (Func<IEnumerable<TElement>, TCollection>)state.Current.JsonTypeInfo.CreateObjectWithArgs; state.Current.ReturnValue = func((List<TElement>)state.Current.ReturnValue); } } }