DynamicCastToGenerated works for nullptr input for even if RTTI is disabled
Arena is refactored and optimized.
Clarified/specified that the exact value of Arena::SpaceAllocated() is an implementation detail users must not rely on. It should not be used in unit tests.
Change the signature of Any::PackFrom() to return false on error.
Add fast reflection getter API for strings.
Constant initialize the global message instances
Avoid potential for missed wakeup in UnknownFieldSet
Now Proto3 Oneof fields have "has" methods for checking their presence in C++.
Bugfix for NVCC
Return early in _InternalSerialize for empty maps.
Adding functionality for outputting map key values in proto path logging output (does not affect comparison logic) and stop printing 'value' in the path. The modified print functionality is in the MessageDifferencer::StreamReporter.
Fix some warning when compiling with Visual Studio 2019 on x64 target (#8125)
Python
Provided an override for the reverse() method that will reverse the internal collection directly instead of using the other methods of the BaseContainer.
MessageFactory.CreateProtoype can be overridden to customize class creation.
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