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2019-06-28 version 3.9.0 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript) C++ * Optimize and simplify implementation of RepeatedPtrFieldBase * Don't create unnecessary unknown field sets. * Remove branch from accessors to repeated field element array. * Added delimited parse and serialize util. * Reduce size by not emitting constants for fieldnumbers * Fix a bug when comparing finite and infinite field values with explicit tolerances. * TextFormat::Parser should use a custom Finder to look up extensions by number if one is provided. * Add MessageLite::Utf8DebugString() to make MessageLite more compatible with Message. * Fail fast for better performance in DescriptorPool::FindExtensionByNumber() if descriptor has no defined extensions. * Adding the file name to help debug colliding extensions * Added FieldDescriptor::PrintableNameForExtension() and DescriptorPool::FindExtensionByPrintableName(). The latter will replace Reflection::FindKnownExtensionByName(). * Replace NULL with nullptr * Created a new Add method in repeated field that allows adding a range of elements all at once. * Enabled enum name-to-value mapping functions for C++ lite * Avoid dynamic initialization in descriptor.proto generated code * Move stream functions to MessageLite from Message. * Move all zero_copy_stream functionality to io_lite. * Do not create array of matched fields for simple repeated fields * Enabling silent mode by default to reduce make compilation noise. (#6237) Java * Expose TextFormat.Printer and make it configurable. Deprecate the static methods. * Library for constructing google.protobuf.Struct and google.protobuf.Value * Make OneofDescriptor extend GenericDescriptor. * Expose streamingness of service methods from MethodDescriptor. * Fix a bug where TextFormat fails to parse Any filed with > 1 embedded message sub-fields. * Establish consistent JsonFormat behavior for nulls in oneofs, regardless of order. * Update GSON version to 3.8.5. (#6268) * Add `protobuf_java_lite` Bazel target. (#6177) Python * Change implementation of Name() for enums that allow aliases in proto2 in Python to be in line with claims in C++ implementation (to return first value). * Explicitly say what field cannot be set when the new value fails a type check. * Duplicate register in descriptor pool will raise errors * Add __slots__ to all well_known_types classes, custom attributes are not allowed anymore. * text_format only present 8 valid digits for float fields by default JavaScript * Add Oneof enum to the list of goog.provide PHP * Make php message class final to avoid mocking. (#6277) * Rename get/setXXXValue to get/setXXXWrapper. (#6295) Ruby * Remove to_hash methods. (#6166) 2019-04-29 version 3.8.0 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript) C++ * Use std::atomic<int32> in case of myriad2 platform * Always declare enums to be int-sized * Added DebugString() and ShortDebugString() methods on MessageLite * Specialized different parse loop control flows * Make hasbits potentially in register. The or's start forming an obstacle because it's a read modify store on the same mem address on each iteration. * Move to an internal MACRO for parser validity checks. * Improve map parsing performance. * Make MergePartialFromCodedStream non virtual. This allows direct calls, potential inlining and is also a code health improvement * Add an overall limit to parse_context to prevent reading past it. This allows to remove a annoying level of indirection. * Fix a mistake, we shouldn't verify map key/value strings for utf8 in opt mode for proto2. * Further improvements to cut binary size. * Prepare to make MergePartialFromCodedStream non-virtual. * A report on some interesting behavior change in python (caused by b/27494216) made me realize there is a check that needs to be done in case the parse ended on a end group tag. * Add a note of caution to the comments around skip in CodedOutputStream. * Simplify end check. * Add overload for ParseMessage for MessageLite/Message types. If the explicit type is not known inlining won't help de-virtualizing the virtual call. * Reduce linker input. It turns out that ParseMessage is not inlined, producing template instantiations that are used only once and save nothing but cost more. * Improve the parser. * [c++17] Changed proto2::RepeatedPtrField iterators to no longer derive from the deprecated std::iterator class. * Change the default value of case_insensitive_enum_parsing to false for JsonStringToMessage. * Add a warning if a field name doesn't match the style guide. * Fix TextFormat not round-trip correctly when float value is max float. * Added locationed info for some errors at compiler * Python reserved keywords are now working with getattr()/setattr() for most descriptors. * Added AllowUnknownField() in text_format * Append '_' to C++ reserved keywords for message, enum, extension * Fix MSVC warning C4244 in protobuf's parse_context.h. * Updating Iterators to be compatible with C++17 in MSVC. * Use capability annotation in mutex.h * Fix "UndefinedBehaviorSanitizer: cfi-bad-type" * CriticalSectionLock class as a lightweight replacement for std::mutex on Windows platforms. * Removed vestigial wire_format_lite_inl.h C# * Added System.Memory dependency. Java * Make Java protoc code generator ignore optimize_for LITE_RUNTIME. Users should instead use the Java lite protoc plugin. * Change Extension getMessageDefaultInstance() to return Message instead of MessageLite. * Prevent malicious input streams from leaking buffers for ByteString or ByteBuffer parsing. * Release new Javalite runtime. * Show warning in case potential file name conflict. * Allow Java reserved keywords to be used in extensions. * Added setAllowUnknownFields() in text format * Add memoization to ExtensionRegistryLite.getEmptyRegistry() * Improve performance of CodedOutputStream.writeUInt32NoTag * Add an optimized mismatch-finding algorithm to UnsafeUtil. * When serializing uint32 varints, check that we have MAX_VARINT32_SIZE bytes left, not just MAX_VARINT_SIZE. * Minor optimization to RopeByteString.PieceIterator JavaScript * Simplify generated toObject code when the default value is used. Python * Changes implementation of Name() for enums that allow aliases in proto2 in Python to be in line with claims in C++ implementation (to return first value). * Added double_format option in text format printer. * Added iter and __contains__ to extension dict * Added allow_unknown_field option in python text format parser * Fixed Timestamp.ToDatetime() loses precision issue * Support unknown field in text format printer. * Float field will be convert to inf if bigger than struct.unpack('f', b'\xff\xff\x7f\x7f')[0] which is about 3.4028234664e+38, convert to -inf if smaller than -3.4028234664e+38 * Allowed casting str->bytes in Message.__setstate__ Ruby * Helper methods to get enum name for Ruby. 2019-01-24 version 3.7.0 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript) C++ * Introduced new MOMI (maybe-outside-memory-interval) parser. * Add an option to json_util to parse enum as case-insensitive. In the future, enum parsing in json_util will become case-sensitive. * Added conformance test for enum aliases * Added support for --cpp_out=speed:... * Added use of C++ override keyword where appropriate * Many other cleanups and fixes. Java * Fix illegal reflective access warning in JDK 9+ * Add BOM Python * Added Python 3.7 compatibility. * Modified ParseFromString to return bytes parsed . * Introduce Proto C API. * FindFileContainingSymbol in descriptor pool is now able to find field and enum values. * reflection.MakeClass() and reflection.ParseMessage() are deprecated. * Added DescriptorPool.FindMethodByName() method i