Added a deterministic serialization API for C++. The deterministic
serialization guarantees that given a binary, equal messages will be
serialized to the same bytes. This allows applications like MapReduce to
group equal messages based on the serialized bytes. The deterministic
serialization is, however, NOT canonical across languages; it is also
unstable across different builds with schema changes due to unknown fields.
Users who need canonical serialization, e.g. persistent storage in a
canonical form, fingerprinting, etc, should define their own
canonicalization specification and implement the serializer using reflection
APIs rather than relying on this API.
Added OneofOptions. You can now define custom options for oneof groups.
Introduced a deterministic serialization API in
CodedOutputStream::SetSerializationDeterministic(bool). See the notes about
deterministic serialization in the General section.
Added google::protobuf::Map::swap() to swap two map fields.
Fixed a memory leak when calling Reflection::ReleaseMessage() on a message
allocated on arena.
Improved error reporting when parsing text format protos.
JSON
Added a new parser option to ignore unknown fields when parsing JSON.
Added convenient methods for message to/from JSON conversion.
Various performance optimizations.
Java (beta)
File option "java_generate_equals_and_hash" is now deprecated. equals() and
hashCode() methods are generated by default.
Added a new JSON printer option "omittingInsignificantWhitespace" to produce
a more compact JSON output. The printer will pretty-print by default.
Updated Java runtime to be compatible with 2.5.0/2.6.1 generated protos.
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Bumps protobuf from 4.21.5 to 4.21.6.
Release notes
Sourced from protobuf's releases.
... (truncated)
Commits
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