reflectcodec

type FieldDesc struct {
	Index       int
	MaxSliceLen uint32
}

type StructFielder interface {
	// Returns the fields that have been marked as serializable in [t], which is
	// a struct type. Additionally, returns the custom maximum length slice that
	// may be serialized into the field, if any.
	// Returns an error if a field has tag "[tagName]: [TagValue]" but the field
	// is un-exported.
	// GetSerializedField(Foo) --> [1,5,8] means Foo.Field(1), Foo.Field(5),
	// Foo.Field(8) are to be serialized/deserialized.
	GetSerializedFields(t reflect.Type) ([]FieldDesc, error)
}

type TypeCodec interface {
	// UnpackPrefix unpacks the prefix of an interface from the given packer.
	// The prefix specifies the concrete type that the interface should be
	// deserialized into. This function returns a new instance of that concrete
	// type. The concrete type must implement the given type.
	UnpackPrefix(*wrappers.Packer, reflect.Type) (reflect.Value, error)

	// PackPrefix packs the prefix for the given type into the given packer.
	// This identifies the bytes that follow, which are the byte representation
	// of an interface, as having the given concrete type.
	// When deserializing the bytes, the prefix specifies which concrete type
	// to deserialize into.
	PackPrefix(*wrappers.Packer, reflect.Type) error
}