unknown_field_set.h

#include <google/protobuf/unknown_field_set.h>
namespace google::protobuf

Contains classes used to keep track of unrecognized fields seen while parsing a protocol message.

class UnknownFieldSet

#include <google/protobuf/unknown_field_set.h>
namespace google::protobuf

An UnknownFieldSet contains fields that were encountered while parsing a message but were not defined by its type.

Keeping track of these can be useful, especially in that they may be written if the message is serialized again without being cleared in between. This means that software which simply receives messages and forwards them to other servers does not need to be updated every time a new field is added to the message definition.

To get the UnknownFieldSet attached to any message, call Reflection::GetUnknownFields().

This class is necessarily tied to the protocol buffer wire format, unlike the Reflection interface which is independent of any serialization scheme.

int UnknownFieldSet::SpaceUsedExcludingSelf() const

const UnknownField &
    UnknownFieldSet::field(
        int index) const

UnknownField * UnknownFieldSet::mutable_field(
        int index)

class UnknownField

#include <google/protobuf/unknown_field_set.h>
namespace google::protobuf

Represents one field in an UnknownFieldSet.

enum UnknownField::Type {
  TYPE_VARINT,
  TYPE_FIXED32,
  TYPE_FIXED64,
  TYPE_LENGTH_DELIMITED,
  TYPE_GROUP
}