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Flatbuffers Change Log

All major or breaking changes will be documented in this file, as well as any new features that should be highlighted. Minor fixes or improvements are not necessarily listed.

22.10.25 (Oct 25 2002)

  • Added Nim language support with generator and runtime libraries (#7534).

22.9.29 (Sept 29 2022)

  • Rust soundness fixes to avoid the crate from bing labelled unsafe (#7518).

22.9.24 (Sept 24 2022)

  • 20 Major releases in a row? Nope, we switched to a new versioning scheme that is based on date.

  • Python supports fixed size arrays now (#7529).

  • Behavior change in how C++ object API uses UnPackTo. The original intent of this was to reduce allocations by reusing an existing object to pack data into. At some point, this logic started to merge the states of the two objects instead of clearing the state of the packee. This change goes back to the original intention, the packed object is cleared when getting data packed into it (#7527).

  • Fixed a bug in C++ alignment that was using sizeof() instead of the intended AlignOf() for structs (#7520).

  • C# has an official Nuget package now (#7496).

2.0.8 (Aug 29 2022)

  • Fix for --keep-prefix the was generating the wrong include statements for C++ (#7469). The bug was introduced in 2.0.7.

  • Added the Verifier::Options option struct to allow specifying runtime configuration settings for the verifier (#7489). This allows to skip verifying nested flatbuffers, a on-by-default change that was introduced in 2.0.7. This deprecates the existing Verifier constructor, which may be removed in a future version.

  • Refactor of tests/test.cpp that lead to ~10% speedup in compilation of the entire project (#7487).

2.0.7 (Aug 22 2022)

  • This is the first version with an explicit change log, so all the previous features will not be listed.

  • Verifier now checks that buffers are at least the minimum size required to be a flatbuffers (12 bytes). This includes nested flatbuffers, which previously could be declared valid at size 0.

  • Annotated binaries. Given a flatbuffer binary and a schema (or binary schema) one can generate an annotated flatbuffer (.afb) to describe each byte in the binary with schema metadata and value.

  • First binary schema generator (Lua) to generate Lua code via a .bfbs file. This is mostly an implementation detail of flatc internals, but will be slowly applied to the other language generators.