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