using System.Collections; using System.Diagnostics; using System.Runtime.CompilerServices; using System.Runtime.InteropServices; using System.Text.Json.Serialization; using System.Text.Json.Serialization.Metadata; namespace System.Text.Json { [StructLayout(LayoutKind.Auto)] [DebuggerDisplay("{DebuggerDisplay,nq}")] internal struct WriteStackFrame { public IEnumerator CollectionEnumerator; public IAsyncDisposable AsyncDisposable; public bool AsyncEnumeratorIsPendingCompletion; public JsonPropertyInfo JsonPropertyInfo; public bool IsWritingExtensionDataProperty; public JsonTypeInfo JsonTypeInfo; public int OriginalDepth; public bool ProcessedStartToken; public bool ProcessedEndToken; public StackFramePropertyState PropertyState; public int EnumeratorIndex; public string JsonPropertyNameAsString; public MetadataPropertyName MetadataPropertyName; public PolymorphicSerializationState PolymorphicSerializationState; public JsonTypeInfo PolymorphicTypeInfo; public JsonNumberHandling? NumberHandling; public bool IsPushedReferenceForCycleDetection; [DebuggerBrowsable(DebuggerBrowsableState.Never)] private string DebuggerDisplay { [IsReadOnly] get { DefaultInterpolatedStringHandler defaultInterpolatedStringHandler = new DefaultInterpolatedStringHandler(20, 2); defaultInterpolatedStringHandler.AppendLiteral("ConverterStrategy."); defaultInterpolatedStringHandler.AppendFormatted(JsonTypeInfo?.Converter.ConverterStrategy); defaultInterpolatedStringHandler.AppendLiteral(", "); defaultInterpolatedStringHandler.AppendFormatted(JsonTypeInfo?.Type.Name); return defaultInterpolatedStringHandler.ToStringAndClear(); } } public void EndCollectionElement() { PolymorphicSerializationState = PolymorphicSerializationState.None; } public void EndDictionaryEntry() { PropertyState = StackFramePropertyState.None; PolymorphicSerializationState = PolymorphicSerializationState.None; } public void EndProperty() { JsonPropertyInfo = null; JsonPropertyNameAsString = null; PropertyState = StackFramePropertyState.None; PolymorphicSerializationState = PolymorphicSerializationState.None; } [IsReadOnly] public JsonTypeInfo GetNestedJsonTypeInfo() { if (PolymorphicSerializationState != PolymorphicSerializationState.PolymorphicReEntryStarted) return JsonPropertyInfo.JsonTypeInfo; return PolymorphicTypeInfo; } public JsonTypeInfo InitializePolymorphicReEntry(Type runtimeType, JsonSerializerOptions options) { if (PolymorphicTypeInfo?.Type != runtimeType) { JsonTypeInfo typeInfoInternal = options.GetTypeInfoInternal(runtimeType, true, true, false, true); PolymorphicTypeInfo = (typeInfoInternal.AncestorPolymorphicType ?? typeInfoInternal); } PolymorphicSerializationState = PolymorphicSerializationState.PolymorphicReEntryStarted; return PolymorphicTypeInfo; } public JsonConverter InitializePolymorphicReEntry(JsonTypeInfo derivedJsonTypeInfo) { PolymorphicTypeInfo = derivedJsonTypeInfo; PolymorphicSerializationState = PolymorphicSerializationState.PolymorphicReEntryStarted; return derivedJsonTypeInfo.Converter; } public JsonConverter ResumePolymorphicReEntry() { PolymorphicSerializationState = PolymorphicSerializationState.PolymorphicReEntryStarted; return PolymorphicTypeInfo.Converter; } public void ExitPolymorphicConverter(bool success) { PolymorphicSerializationState = ((!success) ? PolymorphicSerializationState.PolymorphicReEntrySuspended : PolymorphicSerializationState.None); } } }