public void Serialize(ref MessagePackWriter writer, ref int idx, object value, IFormatterResolver formatterResolver)
{
if (value == null)
{
writer.WriteNil(ref idx); return;
}
var type = value.GetType();
if (!s_typeNameCache.TryGetValue(type, out Type expectedType))
{
GetExpectedTypeSlow(type, out expectedType);
}
if (expectedType == null)
{
Resolvers.TypelessFormatterFallbackResolver.Instance.GetFormatter <object>().Serialize(ref writer, ref idx, value, formatterResolver);
return;
}
// don't use GetOrAdd for avoid closure capture.
if (!s_serializers.TryGetValue(expectedType, out var formatterAndDelegate))
{
GetFormatterAndDelegateSlow(expectedType, formatterResolver, out formatterAndDelegate);
}
// mark as extension with code 100
writer.Ensure(idx, 6);
var startOffset = idx;
idx += 6; // mark will be written at the end, when size is known
var typeName = MessagePackBinary.GetEncodedTypeName(expectedType);
UnsafeMemory.WriteRaw(ref writer, typeName, ref idx);
formatterAndDelegate.Value(formatterAndDelegate.Key, ref writer, ref idx, value, formatterResolver);
var dataLength = idx - startOffset - 6;
MessagePackBinary.WriteExtensionFormatHeaderForceExt32Block(ref writer.PinnableAddress, startOffset, ExtensionTypeCode, dataLength);
}