FlatBuffers: Memory Efficient Serialization Library

Last update: Jan 01, 2023

Overview

FlatBuffers

FlatBuffers is a cross platform serialization library architected for maximum memory efficiency. It allows you to directly access serialized data without parsing/unpacking it first, while still having great forwards/backwards compatibility.

Go to our landing page to browse our documentation.

Supported operating systems

Windows
MacOS X
Linux
Android
And any others with a recent C++ compiler.

Supported programming languages

C++
C#
C
Dart
Go
Java
JavaScript
Lobster
Lua
PHP
Python
Rust
TypeScript

and more in progress...

Contribution

FlatBuffers Google Group to discuss FlatBuffers with other developers and users.
FlatBuffers Issues Tracker to submit an issue.
stackoverflow.com with flatbuffers tag for any questions regarding FlatBuffers.

To contribute to this project, see CONTRIBUTING.

Licensing

Flatbuffers is licensed under the Apache License, Version 2.0. See LICENSE for the full license text.

Comments

Feature RFC: Flatbuffers support for Optional types.
Note: This top comment is heavily edited. It was kept up with the current state until this issue closed.

Motivation

Flatbuffers should allow users to choose to use optional types. There has been some interest in distinguishing between default values (which are not stored in the binary) and some notion of None which the user controls.

Here are some links to previous interest in this idea:

#333

#3777

https://groups.google.com/forum/#!topic/flatbuffers/1hrNtBI0BQI

https://github.com/google/flatbuffers/issues/5875#issuecomment-619737916

Currently, a user can control a field's presence in the binary by specifying "force_defaults" and checking "IsFieldPresent" which is a bit of a hack. This proposal should define proper Flatbuffers optional types, which should be a better way of doing this. Use of this feature is only advisable for new fields, since changing default values is in general backwards-incompatible.

How do we represent this in the schema file?

We will specify it like so

table Monster { mana: int = null; }

This visually implies that optional types are at odds with default values and is "consistent" since the value to the right of the equals sign is what we interpret non-presence to mean.

Change to Schema Grammar:

field_decl = ident : type [ = (scalar | null) ] metadata ;

~We can add a field tag, e.g. "optional" or "no_default", that triggers this behavior. Hopefully no one is using those tags. Maybe we can make it specifiable to flatc, an "--optional-field-keyword-tag" flag, just in case people are using it and can't stop.~

How do we represent this in the binary?

We are going with option (A).

(A) Non-Presence means None

Instead of omitting zero-like values, the generated code must store them. Non-presence for optional fields no longer means "whatever the default is," now it means None. You can interpret it as "the default value is None". This also means we cannot specify both specify a non-null default and mark the field as optional.

Pros:

This seems more intuitive.

It aligns with the "force_defaults" + "IsFieldPresent" hacky manual approximation of this feature.

If Nones are more common than zero-likes then this will have smaller binaries.

Cons:

@aardappel thinks this is harder to implement

"making presence an indicator would require we pass this special field status down to the field construction code to override the current val == default check, which means slowdown, codegen and runtime changes in all languages.. whereas my "least likely to be used default" trick requires no changes"

~(B) Some Sentinel value means None~

In this scenario, zero-like values are still not stored. Instead we choose some "sentinel" value which we interpret to be None (e.g. int can use int_min and float can use some kind of Nan).

Pros:

@aardappel thinks this is easier to implement

"it requires the schema parser to set default values for you, and no changes anywhere else"

If zero-likes are more common than None then this will have smaller binaries

Cons:

Someone might want to use the sentinel value (Hyrum's law).

This can be mitigated by publishing the sentinels and letting users decide whether they need the sentinels.

This probably won't work for fields representing raw bits.

How do we represent this in every language API?

We'll need to change the type signature of all generated code (building/reading/mutating/object/etc) around the optional type to signal its optional-ness. I think we should use the language's local standard for optional types. Suggestions:

Python: Optional[T].

Rust: Option<T>.

C++17 has std::optional<T> but its not obvious what to use for earlier versions. T* would work.

Java: Optional shows up in Java 1.8 and triggers autoboxing, so idk :/

The exact generated-API for a language should be discussed in the PR implementing this feature in that language.

Out of scope

(I'll add links if you make issues for these feature requests)

Syntactic types

Default values for strings and tables

TODO

| task | owner | done |---|---|---| | Change flatc to support schemas with optional types and cause an error if they're used in unsupported languages | @CasperN | #6026 ✅ | Implement optional type API in C++ | @vglavnyy | #6155 ✅ | Implement optional type API in Java | @paulovap | #6212 ✅ | Implement optional type API in Rust | @CasperN | #6034 ✅ | Implement optional type API in Swift | @mustiikhalil | #6038 ✅ | Implement optional type API in lobster | @aardappel | ✅ | Implement optional type API in Kotlin | @paulovap | #6115 ✅ | Implement optional type API in Python | @rw? | Implement optional type API in Go | @rw? | Implement optional type API in C | @mikkelfj | ✅ | Implement optional type API in C# | @dbaileychess | #6217 ✅ | Implement optional type API in Typescript/javacscript | @krojew | #6215 ✅ | Php, Dart, etc ... | ? | Update documentation to advertise this feature | @cneo | #6270 ✅

[edits]

added todo list

added points from the discussion to each section.

added out of scope section

Decision: go with (A) and use = null syntax in schema file (cross out alternatives)

Updated TODO list, finished parser, Rust in progress

Change to schema grammar, link to swift PR, Note at top

Added more languages to the TODO

Lobster support 🦞

Kotlin and C support

Java, C#, TS/JS support and docs, issue closed, no longer editing.
opened by CasperN 136
Fixed array length

This change ports the pull request #3987 by daksenik and idoroshev to the most recent commit and adds support for generation of JSON schema, Java, C# and Python.

opened by svenk177 101
Support for Rust programming language

This pull request include an implementation of the Flatbuffers runtime for the Rust programming language and Rust code generation via the flatc binary.

Code is well documented and currently passes a full suite of tests. I do however still need to add a sample and do more benchmark testing. In the meantime I want to get this on the projects radar to discuss.

Thanks!

opened by josephDunne 76
[Swift] Swift implementation 🎉🎉
Good afternoon,

@mzaks and I hope with this PR we would be able to add an official implementation for swift, it's heavily inspired by the C++ and C# implementations. There are some elements that are still missing such as the code generator and also documentation for the code base, however I found that we can implement those after getting an initial review for the swift code base, and if it lives up to the standards.

The FlatBuffer class uses apples underlaying UnsafeMutableRawPointer which allows is to write directly to the memory, and lefts a lot of heavy weight from our shoulders, since this implementation comes which the following function storeBytes with takes a value and it's Bytes representation and just adds it to the buffer. UnsafeMutableRawPointer the name is a bit misleading since it's actually safe to use if everything writing the bytes is well structured. and since we don't really allow the user to get to the underlying adding and pushing to the buffer and only allowing them to do so through the builder it would be completely safe to use it.

The FlatBuffersBuilder class uses the same underlying logic as C++ and C#, but unlike C# it relies on generics to actually add bytes and elements into the buffer. we took a different approach regarding adding the structs into the buffer, since swift uses the storeBytes to actually store the struct into the buffer, and since FlatBuffers do not allow string in Structs we took that into our advantage.

struct Vec2: Writeable { var _x: Float32 var _y: Float32 var _z: Float32 var _c: Color2 init(x: Float32, y: Float32, z: Float32, color: Color2) { _c = color; _x = x; _y = y; _z = z } static func createVec2(_ bb: FlatBuffersBuilder, v: Vec2) -> Offset<UOffset> { return bb.create(struct: v) } }

the following struct will be able to be directly inserted into the buffer, and we will be implementing a reader struct that will read the Writable struct as shown below. This will have the same concept as the builder Objects in c++. The readers were implemented to follow the C# way of fetching elements from the buffer.

struct Vec2_Read: Readable { private var __p: Struct init(_ fb: FlatBuffer, o: Int32) { __p = Struct(bb: fb, position: o) } var c: Color2 { return Color2(rawValue: __p.readBuffer(of: Int32.self, at: 12)) ?? .red } var x: Float32 { return __p.readBuffer(of: Float32.self, at: 0)} var y: Float32 { return __p.readBuffer(of: Float32.self, at: 4)} var z: Float32 { return __p.readBuffer(of: Float32.self, at: 8)} }

All the test case are passing, and they were created by the flatc code generator for both C++ and C#, and the basic implementation of swift was verified against those two since the code generator isn't implemented yet.

what's missing: 1- Code Generator 2- Documentation 3- Benchmarking

when merging this PR we would be closing the following issues, Closes #5504. and I will be rebasing the commit before merging for sure
opened by mustiikhalil 75
Tracking issue: Rust buffer verification
This is a tracking issue to document design and implementation of a verifier system for Rust Flatbuffers. I'm thinking that we can clone the logic from the C++ codebase.

The benefit is twofold:

Verifiers let users check if data is valid, thereby providing a security check for unknown data.

If a buffer is verified, we can justify using more unsafe pointer access in Rust, thereby removing bounds checking.

Anyone have thoughts on this? @aardappel
enhancement rust
opened by rw 69
Non smart pointers --gen-object-api version

It is needed to allow the users to assign one struct to another.

I also added implementation for operator= for unions, now you can do: union1 = union2; or union1 = supportedStruct;

It is also needed for the upcoming (in the (near) future) Qt support.

opened by bog-dan-ro 68
[TS/JS] New gen TS code gen
Modernize TS/JS code gen by doing a reworked TS only code gen.

TODO

[x] Split output into modules (files)

[x] Devise a sensible alias/prefix for flatbuffers imports to not collide with user symbols

[x] Track needed imports

[x] Alias imported symbols if same name from different namespaces

[x] Do not generate extra ;

[x] Fix wrong static method generation

[x] Drop flatbuffers namespace completely

[x] var to let or const

[x] Remove ns wrapping/prefixing

[x] Fix object API

[x] Remove obsolete generator options

[x] Fix and verify JavaScriptFlexBuffersTest.js

[x] Remove jsdoc type annotations

Documentation

[ ] Decide what to do about Compiler.md, JavaScriptUsage.md, Tutorial.md and javascript_sample.sh

TODO (undecided)

[ ] Resolve closer relative paths in imports

[ ] Avoid unused imports

[ ] Proper indentation

[ ] Const correctness

[ ] noImplicitAny compliant generated source

c++ javascript typescript codegen documentation json CI
opened by bjornharrtell 66
FlatBuffers 2.0 tracking issue
This issue is to keep track of the FlatBuffers 2.0 release, which is intended to be "soon", but also "when its done".

2.0 you ask? Wasn't the last one 1.12 ? Yes, because:

We're going to attempt to adhere as best we can to "Semantic Versioning" from now on. Past releases were simply 1.0 thru 1.12 with no regard for how many breaking changes were in a release. Generally, every release so far has been breaking for at least 1 language, but we have not expressed that. If we continue our habit of occasionally breaking APIs, the release after this one may thus have to be 3.0 instead of 2.1, but we'll see. Our version architect is @krojew

We actually do seem to have more breaking changes than usual, with especially Rust getting a big overhaul, but also Swift, Python and others. So 2.0 seems appropriate.

What are we waiting for? We are waiting for some of these larger breaking changes to "settle down". This thread will link those issues, once all are merged we'll get the release going.

Also worth mentioning: we are attempting to work towards a structure where FlatBuffers development is more "distributed", with clear individual maintainers for each language, that may at some point may make language package releases and such independently of the main FlatBuffers releases. But this will take time.
opened by aardappel 60
[Python] (scalar) vector reading speedup via numpy
Reading vectors with generated Python code is slow. There have been other efforts to speed this up but they appear to have stagnated.

This PR attempts to make a minimal change that covers a use case I personally hit a lot (copying over large vectors that represent nested flatbuffers). There may be other small changes that could drastically speed up other use cases that are not included here since I am unaware of them :)

What's the change?

This PR adds support for accessing a scalar vector as a numpy array of the corresponding type. This is much faster than copying large vectors element-by-element.

Update the Table class in Python to have a GetVectorAsNumpy method which returns a zero-copy view (in numpy terminology) into a scalar vector cast as the correct type.

Update the python-code-generation code (idl_gen_python.cpp) to generate a method which wraps GetVectorAsNumpy in generated code. This method is named <field name>AsNumpy, which can be compared to the generated name of the method to get the length of a vector, <field name>Length. Attempting to use this method if numpy is not installed will result in an error, but otherwise numpy is optional.

Update appveyor CI to run Python tests.

Update python docs appropriately.

See also

#4090 Byte data from flatbuffer vector into a Python NumPy array

This PR can probably close that issue?

#4144 Reading and Writing Binary blobs is incredibly slow with the default API!

This PR can probably close that issue?

#4152 Python: Add numpy array accessors for vectors [WIP]

The PR here and that PR seem to accomplish similar things, but I haven't read enough details to say whether or not the PR here completely supersedes that one.

#284 Python: Support Cython build

#304 Python: Speedup with cython extension (closed by author due to lack of time)
opened by kbrose 53
Port FlatBuffers to Python.

Implement code generation and runtime library for Python 2 and 3, derived from the Go implementation. Additionally, the test suite verifies:

the exact bytes in the Builder buffer during many scenarios, vtable deduplication, and table construction, via a fuzzer derived from the Go implementation.

opened by rw 50
TypeScript support

Thank you for submitting a PR!

Please make sure you include the names of the affected language(s) in your PR title. This helps us get the correct maintainers to look at your issue.

If you make changes to any of the code generators, be sure to run cd tests && sh generate_code.sh (or equivalent .bat) and include the generated code changes in the PR. This allows us to better see the effect of the PR.

If your PR includes C++ code, please adhere to the Google C++ Style Guide, and don't forget we try to support older compilers (e.g. VS2010, GCC 4.6.3), so only some C++11 support is available.

Include other details as appropriate.

Thanks!

opened by krojew 48
[C#] Object API - Invalid Property Name used in UnPackTo for union field
flatc 22.12.06 generates invalid Code for the following schema:

namespace TestNs; union U_Test { TestValueInt, TestValueDouble } table Test { value : U_Test; } table TestValueInt { value : int; } table TestValueDouble { value : double; }

The code generated with flatc.exe --csharp --gen-onefile --gen-object-api csobjectapi.fbs tries to access a property named Value_ while the name of the property is Value.

public void UnPackTo(TestT _o) { _o.Value = new TestNs.U_TestUnion(); _o.Value.Type = this.ValueType; switch (this.ValueType) { default: break; case TestNs.U_Test.TestValueInt: _o.Value.Value_ = this.Value<TestNs.TestValueInt>().HasValue ? this.Value<TestNs.TestValueInt>().Value.UnPack() : null; break; case TestNs.U_Test.TestValueDouble: _o.Value.Value_ = this.Value<TestNs.TestValueDouble>().HasValue ? this.Value<TestNs.TestValueDouble>().Value.UnPack() : null; break; } }

The code fails to compile: csobjectapi_generated.cs(85,18): error CS1061: 'U_TestUnion' does not contain a definition for 'Value_' and no accessible extension method 'Value_' accepting a first argument of type 'U_TestUnion' could be found (are you missing a using directive or an assembly reference?) csobjectapi_generated.cs(88,18): error CS1061: 'U_TestUnion' does not contain a definition for 'Value_' and no accessible extension method 'Value_' accepting a first argument of type 'U_TestUnion' could be found (are you missing a using directive or an assembly reference?)
opened by stefan301 0
[TS] Add option for typescript import file extension
Add an flag import-ext to flatc to specify import extension for typescript

If the flag is not specified, no extension is used when importing.

If --import-ext js is specified it should work the same as before.

Fixes this issue which I also encountered in my NextJS project: https://github.com/google/flatbuffers/issues/7661

Maybe the default should be .js, but not specify an extension to -import-ext to remove it?
python c++ javascript typescript codegen
opened by ink-su 0

[C++] Incorrect operator==() generated for field of fixed sized array

Given a struct with a fixed sized array of scalar type

struct Somestruct {
    items: [float:3];
    tag: uint8;
}

flatc (with the --gen-compare flag) will generate c++ code that includes something like this:

FLATBUFFERS_MANUALLY_ALIGNED_STRUCT(4) Somestruct FLATBUFFERS_FINAL_CLASS {
private:
  float items_[3];
  uint8_t tag_;
  int8_t padding0__;  int16_t padding1__;
public:
  const flatbuffers::Array<float, 3> *items() const {
    return &flatbuffers::CastToArray(items_);
  }
  inline bool operator==(const Somestruct &lhs, const Somestruct &rhs) {
    return
        (lhs.items() == rhs.items()) &&
        (lhs.tag() == rhs.tag());
  }
}

Since items() returns the pointer of Array, this is only comparing the address but not the dereferenced value.

opened by sunwen18 0

[Swift] Clean up
The following PR includes the following:

Removes Dead code & regenerate code

Formats the swift project

Update Sample files

Update docc documentation

Updates swift docs in the website

It was made after the comments in the following issues #7737 & closes #7738
python c++ grpc codegen swift documentation
opened by mustiikhalil 0

Releases(v22.12.06)

v22.12.06(Dec 7, 2022)
What's Changed

Rurel by @CasperN in https://github.com/google/flatbuffers/pull/7663

build.yml Update dependencies by @dbaileychess in https://github.com/google/flatbuffers/pull/7674

build.yml: MacOs Build Inplace by @dbaileychess in https://github.com/google/flatbuffers/pull/7677

Fix java import wild card by @enum-class in https://github.com/google/flatbuffers/pull/7672

Use FinshedBytes() in go-echo example instead of manually encoding offset by @le-michael in https://github.com/google/flatbuffers/pull/7660

chore: emit more reasonable error message when using incomplete type … by @sssooonnnggg in https://github.com/google/flatbuffers/pull/7678

Fix PHP byte validation and reenable builds by @lsl in https://github.com/google/flatbuffers/pull/7670

tests/reflection_test.h: add missing <stdint.h> include by @trofi in https://github.com/google/flatbuffers/pull/7680

Remove --gen-name-strings flag from cmake command for generating union_vector_generated.h by @le-michael in https://github.com/google/flatbuffers/pull/7684

Fix confrom failure for nullptr dereference. by @dbaileychess in https://github.com/google/flatbuffers/pull/7688

Add LICENSE.txt to python by @rishabhdeepsingh in https://github.com/google/flatbuffers/pull/7692

Refactor src/idl_gen_cpp.cpp by @rishabhdeepsingh in https://github.com/google/flatbuffers/pull/7693

Upgrade rules_go for Bazel 7.0 support by @jkuszmaul in https://github.com/google/flatbuffers/pull/7691

Fix "Download Doxygen" URL by @mickelsonmichael in https://github.com/google/flatbuffers/pull/7699

[C++] Update to address comparator failure in big endian by @sunwen18 in https://github.com/google/flatbuffers/pull/7681

fix: byte_width_ = 1U << static_cast(packed_type & 3) implicit-int-conversion fix. by @runhwguo in https://github.com/google/flatbuffers/pull/7697

FlatBuffers Version 22.12.06 by @dbaileychess in https://github.com/google/flatbuffers/pull/7702

New Contributors

@lsl made their first contribution in https://github.com/google/flatbuffers/pull/7670

@mickelsonmichael made their first contribution in https://github.com/google/flatbuffers/pull/7699

@runhwguo made their first contribution in https://github.com/google/flatbuffers/pull/7697

Full Changelog: https://github.com/google/flatbuffers/compare/v22.11.23...v22.12.06
Source code(tar.gz)
Source code(zip)
Linux.flatc.binary.clang++-12.zip(1.41 MB)
Linux.flatc.binary.g++-10.zip(1.35 MB)
Mac.flatc.binary.zip(2.29 MB)
MacIntel.flatc.binary.zip(1.18 MB)
multiple.intoto.jsonl(14.74 KB)
Windows.flatc.binary.zip(1.23 MB)
v22.11.23(Nov 23, 2022)
We had transitory CI breakage in the v22.11.22 release that was marking that build as broken. This release is the same as that one with a new version.

What's Changed

FlatBuffers Version 22.11.23 by @dbaileychess in https://github.com/google/flatbuffers/pull/7662

Full Changelog: https://github.com/google/flatbuffers/compare/v22.11.22...v22.11.23
Source code(tar.gz)
Source code(zip)
Linux.flatc.binary.clang++-12.zip(1.32 MB)
Linux.flatc.binary.g++-10.zip(1.35 MB)
Mac.flatc.binary.zip(2.29 MB)
MacIntel.flatc.binary.zip(1.18 MB)
multiple.intoto.jsonl(14.74 KB)
Windows.flatc.binary.zip(1.23 MB)
v22.11.22(Nov 22, 2022)
What's Changed

[TS] Add support for fixed length arrays on Typescript (#5864) (#7021) by @bulentv in https://github.com/google/flatbuffers/pull/7581

Update dart golden files by @le-michael in https://github.com/google/flatbuffers/pull/7606

Add check for presence of realpath to CMakeLists.txt to support more platforms by @AlexRamallo in https://github.com/google/flatbuffers/pull/7603

Add CreateSharedString to python builder by @le-michael in https://github.com/google/flatbuffers/pull/7608

python: object generation prefix and suffix by @inaryart in https://github.com/google/flatbuffers/pull/7565

Added option to not requires an EoF token when parsing JSON by @alexames in https://github.com/google/flatbuffers/pull/7620

Bump Rust version to 22.10.26 before publication by @CasperN in https://github.com/google/flatbuffers/pull/7622

Add missing #include for std::min/std::max uses, … by @rouault in https://github.com/google/flatbuffers/pull/7624

Fix current official name of macOS by @valeriyvan in https://github.com/google/flatbuffers/pull/7627

Fix: arduino platform build by @shuai132 in https://github.com/google/flatbuffers/pull/7625

Fix missing spaces in flatc help text by @musicinmybrain in https://github.com/google/flatbuffers/pull/7612

Fix help output for --gen-includes by @musicinmybrain in https://github.com/google/flatbuffers/pull/7611

Add support for parsing proto map fields by @le-michael in https://github.com/google/flatbuffers/pull/7613

[TS/Rust/Go/Dart] Fix handling of +/-inf defaults in codegen by @jkuszmaul in https://github.com/google/flatbuffers/pull/7588

Uses swift build command directly in the CI by @mustiikhalil in https://github.com/google/flatbuffers/pull/7635

Temporary fix for SLSA generators by @laurentsimon in https://github.com/google/flatbuffers/pull/7636

[CMake]: only warn when the working directory in a git worktree by @heitbaum in https://github.com/google/flatbuffers/pull/7562

Add comparison operator to python objects under --gen-compare option by @Alex-Ratcliffe in https://github.com/google/flatbuffers/pull/7610

[C++] Minireflect: Add option to indent when converting table to string by @shamilatesoglu in https://github.com/google/flatbuffers/pull/7602

Fixes #7345 to add the option to minify enums by @rishabhdeepsingh in https://github.com/google/flatbuffers/pull/7566

[swift] fix broken swift test build (#7633) by @mr-swifter in https://github.com/google/flatbuffers/pull/7634

Fix import problem in dart generated files. (fixes #7609). by @enum-class in https://github.com/google/flatbuffers/pull/7621

[Go] Fix GenNativeUnionUnPack for imported union type. by @Gh0u1L5 in https://github.com/google/flatbuffers/pull/7579

Put documentation to bfbs if it is not empty by @tira-misu in https://github.com/google/flatbuffers/pull/7649

Fix schema to binary test failure by @enum-class in https://github.com/google/flatbuffers/pull/7650

Add support for using array of scalar as key field in Cpp by @sunwen18 in https://github.com/google/flatbuffers/pull/7623

[C#] Fix collision of member if union name is "Value" by @tira-misu in https://github.com/google/flatbuffers/pull/7648

Fixed the BytesConsumed function, which was pointing slightly ahead. by @alexames in https://github.com/google/flatbuffers/pull/7657

updated method generation to be independent of renaming code by @TJKoury in https://github.com/google/flatbuffers/pull/7642

Fix go generator undefined Package name, also throwing exception by @enum-class in https://github.com/google/flatbuffers/pull/7632

Add key lookup support for tables in Go by @le-michael in https://github.com/google/flatbuffers/pull/7644

Add --go-module-name flag to support generating Go module compatible code by @le-michael in https://github.com/google/flatbuffers/pull/7651

New Contributors

@bulentv made their first contribution in https://github.com/google/flatbuffers/pull/7581

@le-michael made their first contribution in https://github.com/google/flatbuffers/pull/7606

@AlexRamallo made their first contribution in https://github.com/google/flatbuffers/pull/7603

@inaryart made their first contribution in https://github.com/google/flatbuffers/pull/7565

@valeriyvan made their first contribution in https://github.com/google/flatbuffers/pull/7627

@shuai132 made their first contribution in https://github.com/google/flatbuffers/pull/7625

@musicinmybrain made their first contribution in https://github.com/google/flatbuffers/pull/7612

@heitbaum made their first contribution in https://github.com/google/flatbuffers/pull/7562

@Alex-Ratcliffe made their first contribution in https://github.com/google/flatbuffers/pull/7610

@shamilatesoglu made their first contribution in https://github.com/google/flatbuffers/pull/7602

@rishabhdeepsingh made their first contribution in https://github.com/google/flatbuffers/pull/7566

@enum-class made their first contribution in https://github.com/google/flatbuffers/pull/7621

@Gh0u1L5 made their first contribution in https://github.com/google/flatbuffers/pull/7579

@sunwen18 made their first contribution in https://github.com/google/flatbuffers/pull/7623

@TJKoury made their first contribution in https://github.com/google/flatbuffers/pull/7642

Full Changelog: https://github.com/google/flatbuffers/compare/v22.10.26...v22.11.22
Source code(tar.gz)
Source code(zip)
Linux.flatc.binary.clang++-12.zip(1.32 MB)
Linux.flatc.binary.g++-10.zip(1.35 MB)
Mac.flatc.binary.zip(2.29 MB)
MacIntel.flatc.binary.zip(1.18 MB)
multiple.intoto.jsonl(14.75 KB)
Windows.flatc.binary.zip(1.23 MB)
v22.10.26(Oct 26, 2022)
Fix for python #7576

What's Changed

Create release.yml by @dbaileychess in https://github.com/google/flatbuffers/pull/7605

[Python] Fixed the issue with nested unions relying on InitFromBuf. by @joshua-smith8 in https://github.com/google/flatbuffers/pull/7576

FlatBuffers Version 22.10.26 by @dbaileychess in https://github.com/google/flatbuffers/pull/7607

Full Changelog: https://github.com/google/flatbuffers/compare/v22.10.25...v22.10.26
Source code(tar.gz)
Source code(zip)
Linux.flatc.binary.clang++-12.zip(1.30 MB)
Linux.flatc.binary.g++-10.zip(1.33 MB)
Mac.flatc.binary.zip(2.26 MB)
MacIntel.flatc.binary.zip(1.16 MB)
Windows.flatc.binary.zip(1.21 MB)
v22.10.25(Oct 26, 2022)
Change Log

What's Changed

Add support for metadata attributes for enum values (#7567) by @piotrdz in https://github.com/google/flatbuffers/pull/7568

Update documentation to mention enum value attributes by @piotrdz in https://github.com/google/flatbuffers/pull/7570

Turn on clippy for Rust and fix lints for non-generated code by @CasperN in https://github.com/google/flatbuffers/pull/7575

Fix #7580 by documenting union schema evolution rules by @CasperN in https://github.com/google/flatbuffers/pull/7585

#ifndef FLATBUFFERS_NO_FILE_TEST guard some test definitions by @battre in https://github.com/google/flatbuffers/pull/7571

Update Rust version by @CasperN in https://github.com/google/flatbuffers/pull/7574

Rust fix compilation for no_std targets #2 by @danlapid in https://github.com/google/flatbuffers/pull/7553

Fix LongEnum definitions by @battre in https://github.com/google/flatbuffers/pull/7596

Make type conversions explicit. by @battre in https://github.com/google/flatbuffers/pull/7595

[Nim] Bfbs Nim Generator by @danlapid in https://github.com/google/flatbuffers/pull/7534

[vector] Allow to iterate with mutables by @ArnaudD-FR in https://github.com/google/flatbuffers/pull/7586

FlatBuffers Version 22.10.25 by @dbaileychess in https://github.com/google/flatbuffers/pull/7604

New Contributors

@battre made their first contribution in https://github.com/google/flatbuffers/pull/7571

@danlapid made their first contribution in https://github.com/google/flatbuffers/pull/7553

@ArnaudD-FR made their first contribution in https://github.com/google/flatbuffers/pull/7586

Full Changelog: https://github.com/google/flatbuffers/compare/v22.9.29...v22.10.25
Source code(tar.gz)
Source code(zip)
Linux.flatc.binary.clang++-12.zip(1.30 MB)
Linux.flatc.binary.g++-10.zip(1.33 MB)
Mac.flatc.binary.zip(2.26 MB)
MacIntel.flatc.binary.zip(1.16 MB)
Windows.flatc.binary.zip(1.21 MB)
v22.9.29(Sep 30, 2022)
Changelog

What's Changed

Moves swift package to root of repository so it can be used directly … by @mustiikhalil in https://github.com/google/flatbuffers/pull/7548

Rust soundness fixes by @tustvold in https://github.com/google/flatbuffers/pull/7518

[TS] Make strict compliant and improve typings by @bjornharrtell in https://github.com/google/flatbuffers/pull/7549

FlatBuffers Version 22.9.29 by @dbaileychess in https://github.com/google/flatbuffers/pull/7557

New Contributors

@tustvold made their first contribution in https://github.com/google/flatbuffers/pull/7518

Full Changelog: https://github.com/google/flatbuffers/compare/v22.9.24...v22.9.29
Source code(tar.gz)
Source code(zip)
Linux.flatc.binary.clang++-12.zip(1.27 MB)
Linux.flatc.binary.g++-10.zip(1.30 MB)
Mac.flatc.binary.zip(2.20 MB)
MacIntel.flatc.binary.zip(1.13 MB)
Windows.flatc.binary.zip(1.18 MB)
v22.9.24(Sep 27, 2022)
Change Log

What's Changed

Disable Android Build by @dbaileychess in https://github.com/google/flatbuffers/pull/7494

update android multidex setting by @dbaileychess in https://github.com/google/flatbuffers/pull/7495

Updates cocoapods version by @mustiikhalil in https://github.com/google/flatbuffers/pull/7497

[ISSUE-6268] returns NaN insteadof nan by @3axap4eHko in https://github.com/google/flatbuffers/pull/7498

[C#] Prepares for official Nuget release by @dbaileychess in https://github.com/google/flatbuffers/pull/7496

[CMake]: fix breaking find_package change (#7499) by @clanghans in https://github.com/google/flatbuffers/pull/7502

Fixes issue with cocoapods failing to be published because of docc by @mustiikhalil in https://github.com/google/flatbuffers/pull/7505

[Android] Remove maven dependency of flatbuffers and use source folder by @paulovap in https://github.com/google/flatbuffers/pull/7503

[Java][FlexBuffers] throwing exception for untyped fixed vectors by @paulovap in https://github.com/google/flatbuffers/pull/7507

Moves all of the swift test code into tests/swift by @mustiikhalil in https://github.com/google/flatbuffers/pull/7509

Install BuildFlatBuffers.cmake by @dbaileychess in https://github.com/google/flatbuffers/pull/7519

[Java][Flexbuffers] Add API to add nullables into the buffer. by @paulovap in https://github.com/google/flatbuffers/pull/7521

remove travis config by @dbaileychess in https://github.com/google/flatbuffers/pull/7522

prevent force_align attribute on enums by @dbaileychess in https://github.com/google/flatbuffers/pull/7523

enabled cpp17 tests in CI by @dbaileychess in https://github.com/google/flatbuffers/pull/7524

Replace bash JavaTest.sh with mvn test by @nick-someone in https://github.com/google/flatbuffers/pull/7500

Bump junit from 4.13 to 4.13.1 in /java by @dependabot in https://github.com/google/flatbuffers/pull/7526

[TS/JS] Move TS tests to dedicated folder and deps upgrade by @bjornharrtell in https://github.com/google/flatbuffers/pull/7508

UnPackTo disable merge by default by @dbaileychess in https://github.com/google/flatbuffers/pull/7527

Fix conform by @hs3366677 in https://github.com/google/flatbuffers/pull/7532

[C++] Rare bad buffer content alignment if sizeof(T) != alignof(T) by @Naios in https://github.com/google/flatbuffers/pull/7520

Upgrade grpc to 1.49.0 and make sure it builds by @meteorcloudy in https://github.com/google/flatbuffers/pull/7538

[Python] Python fixed size array by @joshua-smith8 in https://github.com/google/flatbuffers/pull/7529

Emit internal enums when swift_implementation_only by @pauley-unsaturated in https://github.com/google/flatbuffers/pull/7545

FlatBuffers Version 22.9.24 by @dbaileychess in https://github.com/google/flatbuffers/pull/7547

New Contributors

@3axap4eHko made their first contribution in https://github.com/google/flatbuffers/pull/7498

@nick-someone made their first contribution in https://github.com/google/flatbuffers/pull/7500

@hs3366677 made their first contribution in https://github.com/google/flatbuffers/pull/7532

@Naios made their first contribution in https://github.com/google/flatbuffers/pull/7520

@meteorcloudy made their first contribution in https://github.com/google/flatbuffers/pull/7538

@joshua-smith8 made their first contribution in https://github.com/google/flatbuffers/pull/7529

@pauley-unsaturated made their first contribution in https://github.com/google/flatbuffers/pull/7545

Full Changelog: https://github.com/google/flatbuffers/compare/v2.0.8...v22.9.24
Source code(tar.gz)
Source code(zip)
attestation.intoto.jsonl(14.69 KB)
Linux.flatc.binary.clang++-12.zip(1.27 MB)
Linux.flatc.binary.g++-10.zip(1.30 MB)
Mac.flatc.binary.zip(2.20 MB)
MacIntel.flatc.binary.zip(1.13 MB)
Windows.flatc.binary.zip(1.18 MB)
v2.0.8(Aug 30, 2022)
Bug fixing release for issues that arose in 2.0.7.

Change Log

What's Changed

Use schema include name for keep-prefix by @dbaileychess in https://github.com/google/flatbuffers/pull/7469

[Java] Shallow unused return value in Pack method by @dbaileychess in https://github.com/google/flatbuffers/pull/7470

Moved compiler warnings around by @dbaileychess in https://github.com/google/flatbuffers/pull/7471

CMake project version detection made more robust by @axelsommerfeldt in https://github.com/google/flatbuffers/pull/7473

Disable RTTI and rework use in idl_gen_ts.cpp by @dbaileychess in https://github.com/google/flatbuffers/pull/7474

Use type traits for specialization by @dbaileychess in https://github.com/google/flatbuffers/pull/7475

[C++] Fixed crash when copying table with empty shared strings by @sssooonnnggg in https://github.com/google/flatbuffers/pull/7477

Version number in file package.json updated to 2.0.7 by @axelsommerfeldt in https://github.com/google/flatbuffers/pull/7476

Include head in stl_emulation.h by @dbaileychess in https://github.com/google/flatbuffers/pull/7480

Fix typos by @dbaileychess in https://github.com/google/flatbuffers/pull/7483

Refactor test.cpp by @dbaileychess in https://github.com/google/flatbuffers/pull/7487

[C++] support native_inline attribute for vector of tables by @sssooonnnggg in https://github.com/google/flatbuffers/pull/7479

C++: Add option to skip verifying nested flatbuffers by @CasperN in https://github.com/google/flatbuffers/pull/7489

[TS/JS] Add rollup and config to generate iife flatbuffers bundle by @bjornharrtell in https://github.com/google/flatbuffers/pull/7449

Namer applied to Typescript generator by @CasperN in https://github.com/google/flatbuffers/pull/7488

Verifier Refinements by @dbaileychess in https://github.com/google/flatbuffers/pull/7490

FlatBuffers Version 2.0.8 by @dbaileychess in https://github.com/google/flatbuffers/pull/7492

New Contributors

@axelsommerfeldt made their first contribution in https://github.com/google/flatbuffers/pull/7473

Full Changelog: https://github.com/google/flatbuffers/compare/v2.0.7...v2.0.8
Source code(tar.gz)
Source code(zip)
attestation.intoto.jsonl(14.67 KB)
Linux.flatc.binary.clang++-12.zip(1.26 MB)
Linux.flatc.binary.g++-10.zip(1.29 MB)
Mac.flatc.binary.zip(2.19 MB)
MacIntel.flatc.binary.zip(1.13 MB)
Windows.flatc.binary.zip(1.18 MB)
v2.0.7(Aug 23, 2022)
This is a minor release with lots of changes :)

I would like to get in the habit of releasing more often (at least for the flatc and C++ libraries) and the first step is to reduce the amount of diffs between releases (especially patch/revision only updates).

See a high level change log notes in our new CHANGELOG.md document, with the following list auto generated by github release workflow:

What's Changed

explicitly use windows-2019 to unblock ci by @dbaileychess in https://github.com/google/flatbuffers/pull/7105

Go optional scalars by @chriscraws in https://github.com/google/flatbuffers/pull/7104

Fix minor typo in WhitePaper.md by @meersuri in https://github.com/google/flatbuffers/pull/7108

[TS] Fix generation of reserved words in object api (#7106) by @tira-misu in https://github.com/google/flatbuffers/pull/7115

Add deps attribute to flatbuffer_cc_library by @jkuszmaul in https://github.com/google/flatbuffers/pull/7107

add the missing checkNullConditionnal code in the "GenObjApi" function by @anov21 in https://github.com/google/flatbuffers/pull/7114

remove auto generate code from cmakelists by @dbaileychess in https://github.com/google/flatbuffers/pull/7119

Trigger fuzzing CI only on relevant changes by @dbaileychess in https://github.com/google/flatbuffers/pull/7120

update proto tests with alaised enum by @dbaileychess in https://github.com/google/flatbuffers/pull/7121

Use target_compile_features to target C++11 by @dbaileychess in https://github.com/google/flatbuffers/pull/7122

Use ConvertCase instead of Make{Upper,Lower,Snake} implementations by @dbaileychess in https://github.com/google/flatbuffers/pull/7127

Replaced ToDasherCase with ConvertCase by @dbaileychess in https://github.com/google/flatbuffers/pull/7131

[Rust] Add length checks to arrays and vectors. by @CasperN in https://github.com/google/flatbuffers/pull/7130

Prevent name clash by @dbaileychess in https://github.com/google/flatbuffers/pull/7133

Fix 64-bit numeric enum values in typescript by @jkuszmaul in https://github.com/google/flatbuffers/pull/7135

[TS] Escape keywords in typescript object names by @jkuszmaul in https://github.com/google/flatbuffers/pull/7137

Implement a config based name manager and use it in Rust codegen by @CasperN in https://github.com/google/flatbuffers/pull/7144

Fix missing 'break' by @CasperN in https://github.com/google/flatbuffers/pull/7151

Apply Namer to Python code gen by @CasperN in https://github.com/google/flatbuffers/pull/7146

Apply Namer to Go code gen by @CasperN in https://github.com/google/flatbuffers/pull/7150

[TS] Add single-file ts codegen & bazel rule for typescript by @jkuszmaul in https://github.com/google/flatbuffers/pull/7161

Use DESCRIPTION only if CMake version >= 3.9 by @Paulchen-Panther in https://github.com/google/flatbuffers/pull/7166

Nameroverloads by @CasperN in https://github.com/google/flatbuffers/pull/7164

Namersw by @CasperN in https://github.com/google/flatbuffers/pull/7167

Make inclusion of header opt-out via macro by @davschne in https://github.com/google/flatbuffers/pull/7168

[Lua] Apply Namer to Lua by @dbaileychess in https://github.com/google/flatbuffers/pull/7171

Annotated Flatbuffer Binary by @dbaileychess in https://github.com/google/flatbuffers/pull/7174

Typo in flatc options (warning-as-errors instead of warnings-as-errors) by @stefan301 in https://github.com/google/flatbuffers/pull/7180

Move flatbuffer_ts_library to typescript.bzl by @jkuszmaul in https://github.com/google/flatbuffers/pull/7183

Adds no-includes flags to the swift code generator by @mustiikhalil in https://github.com/google/flatbuffers/pull/7182

Correctly parse lists of enums in Dart generated code by @insertjokehere in https://github.com/google/flatbuffers/pull/7157

VerifySizePrefixed (reflection::Schema) and GetAnySizePrefixedRoot added by @stefan301 in https://github.com/google/flatbuffers/pull/7181

[TS] Fix generation of struct members in object api by @tira-misu in https://github.com/google/flatbuffers/pull/7148

Handle root offset and root table vtable invalidation by @dbaileychess in https://github.com/google/flatbuffers/pull/7177

Fuzzed binary annotator by @dbaileychess in https://github.com/google/flatbuffers/pull/7188

Namerdart by @CasperN in https://github.com/google/flatbuffers/pull/7187

Annotated Binary Structured Comments by @dbaileychess in https://github.com/google/flatbuffers/pull/7192

[swift] Add bazel configuration for Swift by @keith in https://github.com/google/flatbuffers/pull/7195

[C#] Fix collision of field name and type name by @tira-misu in https://github.com/google/flatbuffers/pull/7149

Apply Namer to Java. by @CasperN in https://github.com/google/flatbuffers/pull/7194

Apply Namer prefix/suffix to other generators by @CasperN in https://github.com/google/flatbuffers/pull/7197

fixed padding in struct for annotated binary by @dbaileychess in https://github.com/google/flatbuffers/pull/7199

[C++] Static assert on Flatbuffers Version by @dbaileychess in https://github.com/google/flatbuffers/pull/7203

maximize parallel builds in CI by @dbaileychess in https://github.com/google/flatbuffers/pull/7206

Add overloads for C# ByteBuffer/FlatBufferBuilder to allow adding vector blocks from ArraySegments or IntPtr by @Jamie-Jameson in https://github.com/google/flatbuffers/pull/7193

Fix for [C++] flatc generates invalid Code in the default constructor for structs, when --cpp-field-case-style is used #7209 by @stefan301 in https://github.com/google/flatbuffers/pull/7211

[C++] generate sorted #include directives by @stefan301 in https://github.com/google/flatbuffers/pull/7213

code gen flexbuffer verifier by @dbaileychess in https://github.com/google/flatbuffers/pull/7207

[C++] stl_emulation span::count_ is not const anymore (#7226) by @avaliente-bc in https://github.com/google/flatbuffers/pull/7227

Started to migrate to target_compile_options by @dbaileychess in https://github.com/google/flatbuffers/pull/7222

Adds implementation flag for swift by @mustiikhalil in https://github.com/google/flatbuffers/pull/7202

Adds a way to verify/exposes Entities ids by @mustiikhalil in https://github.com/google/flatbuffers/pull/7221

Create cpp-linter.yml by @dbaileychess in https://github.com/google/flatbuffers/pull/7208

disable cpp-linter by @dbaileychess in https://github.com/google/flatbuffers/pull/7229

Remove call toascii by @dbaileychess in https://github.com/google/flatbuffers/pull/7234

[Kotlin] Update gradle to 7.4.1 and simplify config files. by @paulovap in https://github.com/google/flatbuffers/pull/7231

[Swift] Fixes a bug for create function by @mustiikhalil in https://github.com/google/flatbuffers/pull/7228

Allow CreateVectorOfStrings() to work with any string-type. by @hzeller in https://github.com/google/flatbuffers/pull/7238

[Java] Fix key lookup returning null clashing with default value by @paulovap in https://github.com/google/flatbuffers/pull/7236

[Kotlin] Fix key lookup returning null clashing with default value by @paulovap in https://github.com/google/flatbuffers/pull/7237

set workflows permissions to read-only by @dbaileychess in https://github.com/google/flatbuffers/pull/7239

Expand test to make sure {}-initializers are properly understood by template by @hzeller in https://github.com/google/flatbuffers/pull/7242

Make Java namespaces keep case by default by @CasperN in https://github.com/google/flatbuffers/pull/7243

Add parameter back to EndVector by @dbaileychess in https://github.com/google/flatbuffers/pull/7246

Java namer typo by @dbaileychess in https://github.com/google/flatbuffers/pull/7249

[optimization] Keep the underlying storage capacity when clearing the FlatBufferBuilder by @hassila in https://github.com/google/flatbuffers/pull/7250

Turn off Go modules temporary by @mustiikhalil in https://github.com/google/flatbuffers/pull/7251

Add test for nested buffer verifier by @dbaileychess in https://github.com/google/flatbuffers/pull/7252

Swift update performance benchmark infrastructure by @hassila in https://github.com/google/flatbuffers/pull/7255

Specialize CreateVector with std::initializer_list by @dbaileychess in https://github.com/google/flatbuffers/pull/7254

Handle +/-inf in protos by @dbaileychess in https://github.com/google/flatbuffers/pull/7256

[performance] [swift] Add systematic inlining by @hassila in https://github.com/google/flatbuffers/pull/7253

Added Swift to supported languages by @hassila in https://github.com/google/flatbuffers/pull/7257

fix include order by @dbaileychess in https://github.com/google/flatbuffers/pull/7266

Rust: fix a name conflict when building with "no_std" feature by @fjarri in https://github.com/google/flatbuffers/pull/7268

[swift] Make swift module public by @keith in https://github.com/google/flatbuffers/pull/7274

Make flatc generate Rust files not requiring std by @fjarri in https://github.com/google/flatbuffers/pull/7273

Namerkot by @CasperN in https://github.com/google/flatbuffers/pull/7245

Remove span ConstIterator/cbegin()/cend(). by @pkasting in https://github.com/google/flatbuffers/pull/7295

[swift] add 'has' property to check optional array presence in mes… by @mr-swifter in https://github.com/google/flatbuffers/pull/7280

Update Rust docs page by @bsilver8192 in https://github.com/google/flatbuffers/pull/7296

Add size check to fix out of bounds read risk by @bjornharrtell in https://github.com/google/flatbuffers/pull/7304

Add explicit return types to lobster generated code by @bartwe in https://github.com/google/flatbuffers/pull/7312

Use keep case for Rust union discriminant type. by @CasperN in https://github.com/google/flatbuffers/pull/7321

[Swift] Wasm support by @mustiikhalil in https://github.com/google/flatbuffers/pull/7328

Started implementation for private flags in rust by @mustiikhalil in https://github.com/google/flatbuffers/pull/7269

Implement optional scalars for Python by @calebzulawski in https://github.com/google/flatbuffers/pull/7318

Move reflection_ts_fbs into a separate directory by @liuliu in https://github.com/google/flatbuffers/pull/7342

Implement optional scalars for JSON by @calebzulawski in https://github.com/google/flatbuffers/pull/7322

[Go] Replace deprecated package io/ioutil by @cia-rana in https://github.com/google/flatbuffers/pull/7281

[TS] fix ts import path issue by @sssooonnnggg in https://github.com/google/flatbuffers/pull/7298

[Kotlin] Remove download benchmark files dependency by @paulovap in https://github.com/google/flatbuffers/pull/7314

[golang] Create missing namespace directory structure (#7324) by @tsturm in https://github.com/google/flatbuffers/pull/7325

[TS] Don't generate self-imports with --ts-flat-file by @jkuszmaul in https://github.com/google/flatbuffers/pull/7340

Revert "Move reflection_ts_fbs into a separate directory" by @dbaileychess in https://github.com/google/flatbuffers/pull/7349

Revert "Implement optional scalars for JSON" by @dbaileychess in https://github.com/google/flatbuffers/pull/7351

Only include direct included files by @dbaileychess in https://github.com/google/flatbuffers/pull/7348

Reenable optional json by @calebzulawski in https://github.com/google/flatbuffers/pull/7352

Bump Newtonsoft.Json from 12.0.3 to 13.0.1 in /tests/FlatBuffers.Test by @dependabot in https://github.com/google/flatbuffers/pull/7363

[Dart] Implement putBool to fix errors when serializing structs with bools by @insertjokehere in https://github.com/google/flatbuffers/pull/7359

Fix references to LICENSE file by @Hixie in https://github.com/google/flatbuffers/pull/7377

Updated Newtonsoft.Json to 13.0.1 by @dbaileychess in https://github.com/google/flatbuffers/pull/7393

cpp_generator: comment out unused parameter to avoid warnings by @yshalabi in https://github.com/google/flatbuffers/pull/7381

fix(#7360): grpc used deprecated functions by @godcong in https://github.com/google/flatbuffers/pull/7361

keep-prefix keeps relative pathing by @dbaileychess in https://github.com/google/flatbuffers/pull/7394

Compilation issue msys2 by @chronoxor in https://github.com/google/flatbuffers/pull/7403

Add missing const by @atkurtul in https://github.com/google/flatbuffers/pull/7401

[TS] fix incorrect reverse order when writting array of structs by @sssooonnnggg in https://github.com/google/flatbuffers/pull/7271

[TS/Bazel] Minor improvements to typescript.bzl by @jkuszmaul in https://github.com/google/flatbuffers/pull/7300

Fix Clang-Cl compile on Windows by @06393993 in https://github.com/google/flatbuffers/pull/7308

grpc/compiler: Respect filename suffix and extension during code generation by @amaneureka in https://github.com/google/flatbuffers/pull/7343

Fix error msg format when generate GRPC failed by @SF-Zhou in https://github.com/google/flatbuffers/pull/7350

(#7323) Rename CMake files according to project name by @clanghans in https://github.com/google/flatbuffers/pull/7378

Revert "grpc/compiler: Respect filename suffix and extension during code generation" by @dbaileychess in https://github.com/google/flatbuffers/pull/7406

Revert "Compilation issue msys2" by @dbaileychess in https://github.com/google/flatbuffers/pull/7407

Compilation issue msys2 #7399 by @chronoxor in https://github.com/google/flatbuffers/pull/7409

[TS] Use TextEncoder and TextDecoder by @bjornharrtell in https://github.com/google/flatbuffers/pull/7400

Add FLATBUFFERS_STRICT_MODE by @dbaileychess in https://github.com/google/flatbuffers/pull/7408

Add tests for flatc by @dbaileychess in https://github.com/google/flatbuffers/pull/7405

Rebased: grpc/compiler: Respect filename suffix and extension during code generation by @amaneureka in https://github.com/google/flatbuffers/pull/7414

Moved TypeScriptTests to python script by @dbaileychess in https://github.com/google/flatbuffers/pull/7411

[golang] Add support for text parsing with json struct tags by @aburdulescu in https://github.com/google/flatbuffers/pull/7353

Remove stringop-overflow from error by @dbaileychess in https://github.com/google/flatbuffers/pull/7422

[golang] Perform keyword escaping after case conversion by @aburdulescu in https://github.com/google/flatbuffers/pull/7421

[C++] Vector of Tables equality by @dbaileychess in https://github.com/google/flatbuffers/pull/7415

[C++] avoid zero-as-null-pointer warning by @sssooonnnggg in https://github.com/google/flatbuffers/pull/7423

Issue#6959 :Updated Automatically generated rust files. by @YashasviChaurasia in https://github.com/google/flatbuffers/pull/7425

[C++] Make template parameter in stl_emulation.h more explicit to avoid conflicts with cpprestsdk U macro by @marcelkrueger in https://github.com/google/flatbuffers/pull/7424

[C++] Set StructDef::has_key property when deserializing from binary … by @sssooonnnggg in https://github.com/google/flatbuffers/pull/7428

Remove auto including locale functions by @dbaileychess in https://github.com/google/flatbuffers/pull/7430

Update gitingore to reflect name change by @dbaileychess in https://github.com/google/flatbuffers/pull/7431

Update TypeScriptTest.py to work better cross platform by @dbaileychess in https://github.com/google/flatbuffers/pull/7436

Add flatc python tests to CI by @dbaileychess in https://github.com/google/flatbuffers/pull/7437

Fix FlexBuffers JS/TS bug by @mzaks in https://github.com/google/flatbuffers/pull/7434

Add checks to verifier by @dbaileychess in https://github.com/google/flatbuffers/pull/7438

[TypeScript] Fix namespaceless schema generation by @dbaileychess in https://github.com/google/flatbuffers/pull/7432

make_span overloads for pointer to vector (#7374) by @stefan301 in https://github.com/google/flatbuffers/pull/7435

Define minimum buffer size by @dbaileychess in https://github.com/google/flatbuffers/pull/7440

[C#] Rework how sorted vectors are looked up by @dbaileychess in https://github.com/google/flatbuffers/pull/7441

Stop using __has_trivial_copy on recent clang versions. by @MirkoBonadei in https://github.com/google/flatbuffers/pull/7443

[Kotlin] Make sure namespace path exist for code generation by @paulovap in https://github.com/google/flatbuffers/pull/7357

Partial support for --ts-flat-files and --gen-all by @dbaileychess in https://github.com/google/flatbuffers/pull/7446

Add some extra warnings, tested on GCC 9.4.0 by @paulharris in https://github.com/google/flatbuffers/pull/7212

Wrap types in namespace for --ts-flat-files and --gen-all by @dbaileychess in https://github.com/google/flatbuffers/pull/7451

[WIP] speedup by @paulovap in https://github.com/google/flatbuffers/pull/7452

Generate SLSA signatures for Released zip files by @laurentsimon in https://github.com/google/flatbuffers/pull/7450

Change to GetTypeName by @dbaileychess in https://github.com/google/flatbuffers/pull/7453

Group anonymous namespaces by @paulharris in https://github.com/google/flatbuffers/pull/7455

Remove old GRPC bash script and convert to python3 by @dbaileychess in https://github.com/google/flatbuffers/pull/7454

[C++] Disabling unpackto optimization by @dbaileychess in https://github.com/google/flatbuffers/pull/7459

update grpc version by @Wyverald in https://github.com/google/flatbuffers/pull/7457

Reworked keep prefix by @dbaileychess in https://github.com/google/flatbuffers/pull/7456

New Contributors

@chriscraws made their first contribution in https://github.com/google/flatbuffers/pull/7104

@meersuri made their first contribution in https://github.com/google/flatbuffers/pull/7108

@anov21 made their first contribution in https://github.com/google/flatbuffers/pull/7114

@Paulchen-Panther made their first contribution in https://github.com/google/flatbuffers/pull/7166

@davschne made their first contribution in https://github.com/google/flatbuffers/pull/7168

@insertjokehere made their first contribution in https://github.com/google/flatbuffers/pull/7157

@keith made their first contribution in https://github.com/google/flatbuffers/pull/7195

@Jamie-Jameson made their first contribution in https://github.com/google/flatbuffers/pull/7193

@avaliente-bc made their first contribution in https://github.com/google/flatbuffers/pull/7227

@hzeller made their first contribution in https://github.com/google/flatbuffers/pull/7238

@hassila made their first contribution in https://github.com/google/flatbuffers/pull/7250

@fjarri made their first contribution in https://github.com/google/flatbuffers/pull/7268

@mr-swifter made their first contribution in https://github.com/google/flatbuffers/pull/7280

@bsilver8192 made their first contribution in https://github.com/google/flatbuffers/pull/7296

@bartwe made their first contribution in https://github.com/google/flatbuffers/pull/7312

@calebzulawski made their first contribution in https://github.com/google/flatbuffers/pull/7318

@cia-rana made their first contribution in https://github.com/google/flatbuffers/pull/7281

@sssooonnnggg made their first contribution in https://github.com/google/flatbuffers/pull/7298

@Hixie made their first contribution in https://github.com/google/flatbuffers/pull/7377

@yshalabi made their first contribution in https://github.com/google/flatbuffers/pull/7381

@atkurtul made their first contribution in https://github.com/google/flatbuffers/pull/7401

@06393993 made their first contribution in https://github.com/google/flatbuffers/pull/7308

@amaneureka made their first contribution in https://github.com/google/flatbuffers/pull/7343

@SF-Zhou made their first contribution in https://github.com/google/flatbuffers/pull/7350

@clanghans made their first contribution in https://github.com/google/flatbuffers/pull/7378

@aburdulescu made their first contribution in https://github.com/google/flatbuffers/pull/7353

@YashasviChaurasia made their first contribution in https://github.com/google/flatbuffers/pull/7425

@marcelkrueger made their first contribution in https://github.com/google/flatbuffers/pull/7424

@MirkoBonadei made their first contribution in https://github.com/google/flatbuffers/pull/7443

@laurentsimon made their first contribution in https://github.com/google/flatbuffers/pull/7450

@Wyverald made their first contribution in https://github.com/google/flatbuffers/pull/7457

Full Changelog: https://github.com/google/flatbuffers/compare/v2.0.6...v2.0.7
Source code(tar.gz)
Source code(zip)
Linux.flatc.binary.clang++-12.zip(1.27 MB)
Linux.flatc.binary.g++-10.zip(1.30 MB)
Mac.flatc.binary.zip(2.22 MB)
MacIntel.flatc.binary.zip(1.15 MB)
Windows.flatc.binary.zip(1.18 MB)
v2.0.0(May 10, 2021)
A summary of what is in this release since 1.12.0:

Support for optional scalars in most languages.

Rust Verifier, Object API and FlexBuffers support, and many API improvements.

Overhaul of TypeScript support.

gRPC for many languages brought up to date.

C++ compile time field reflection.

JS FlexBuffers support.

Kotlin FlexBuffers and platform support.

Swift Object API and many Swift performance improvements.

Lua supports LuaJIT and many more fixes.

Python FlexBuffers support.

Many other fixes and smaller improvements, 371 commits since 1.12.0

Note, "2.0" doesn't signify any kind of major overhaul of FlatBuffers, it is merely trying to be more semver compatible, and this release does have breaking changes for some languages much like all releases before it.
Source code(tar.gz)
Source code(zip)
Linux.flatc.binary.clang++-9.zip(1.04 MB)
Mac.flatc.binary.zip(968.25 KB)
Windows.flatc.binary.zip(1006.77 KB)
v1.12.0(Mar 12, 2020)
A summary of what is in this release since 1.11.0:

An official Swift port! (including gRPC support).

A Kotlin port!

Object API and native JSON support for C#.

Object API and gRPC support for Python.

Object API for Go.

FlexBuffers for Java.

Many other fixes and smaller improvements, 247 commits since 1.11.0

Source code(tar.gz)
Source code(zip)
flatc_windows.zip(902.07 KB)
v1.11.0(Apr 24, 2019)
A summary of what is in this release since 1.10.0:

More accurate C++ float handling, NaN handling, limit checking.

Java optimization: faster object accessors, faster UTF8 conversion.

A lot of Rust port improvements.

Vector of union JSON parsing.

Parser can now work from binary schemas.

Python: numpy vector support.

Packaging: Snap & RPM support.

Many improvements to our CI, added Bazel CI, dockerized language tests.

Many other fixes and smaller improvements, 169 commits since 1.10.0

Source code(tar.gz)
Source code(zip)
flatc_windows_exe.zip(596.76 KB)
v1.10.0(Oct 3, 2018)
A summary of what is in this release since 1.9.0:

Rust support!

Dart support!

Lua support!

Lobster support!

C++: Improved / more correct verifier, compare operator in generated code, new/improved move operators for many data types, string_view support.

Java & C# support vectors of unions.

Many other fixes and smaller improvements, 145 commits since 1.9.0

Source code(tar.gz)
Source code(zip)
flatc_windows_exe.zip(539.51 KB)
v1.9.0(Apr 5, 2018)
A summary of what is in this release since 1.8.0:

Further optimized C++ memory usage for FlatBufferBuilder: from 3 to 1 dynamic allocations (!)

GRPC support in Java & Maven.

Build files for Bazel and Conan.

Prefixed size support for Java/C#/Python.

Typescript docs.

Many other fixes and improvements, 80 commits since 1.8.0

Source code(tar.gz)
Source code(zip)
flatc_windows_exe.zip(421.96 KB)
v1.8.0(Nov 20, 2017)
A summary of what is in this release since 1.7.0:

Vtable trimming in all language implementations: can reduce binary size 10-20%!

Mini-reflection tables (in C++) for debug-print, etc.

Improved .proto conversion.

Vectors of unions now also supported in JS/TS/PHP/C.

Improved namespace handling.

Boolean types in FlexBuffers.

Python Numpy vector support.

Nested FlatBuffer JSON parsing.

C++98 (stlport) support for core FlatBuffers and FlexBuffers.

JSON Schema output support.

Many other fixes and improvements, 90 commits since 1.7.0

Source code(tar.gz)
Source code(zip)
flatc_windows_exe.zip(391.39 KB)
v1.7.1(Jun 20, 2017)
This is a bug fix release.

Calling CreateVector in C++ on a vector of Offset types with an explicit template parameter (of that Offset type) of could cause the wrong specialization to be selected in 1.7.0. This should affect very few people, but safer to use 1.7.1 just in-case. flatc from 1.7.0 is compatible with 1.7.1.

Source code(tar.gz)
Source code(zip)
v1.7.0(Jun 17, 2017)
A summary of what is in this release since 1.6.0:

Typescript support!

Improved GRPC API with proper zero-copy path. BREAKS API

Fixed many issues with ReleaseBufferPointer functionality BREAKS API

FlexBuffers: nested in FlatBuffer accessors, (nested) parsing from JSON, JSON output.

Vectors of unions and unions of structs/strings (C++ only so far).

Several speed optimizations for larger data types in C++ FlatBufferBuilder.

Schema registry functionality.

Improvements to the object API.

Improved docs: C# API, vector of structs.

Many other fixes and improvements, 116 commits since 1.6.0

Source code(tar.gz)
Source code(zip)
flatc_windows_exe.zip(374.72 KB)
v1.6.0(Feb 15, 2017)
A summary of what is in this release since 1.5.0:

First ever version of FlexBuffers!

npm package support.

Vectors of unions now supported (C++ only so far).

Improvements to the object API.

Some speed optimizations.

Many other fixes and improvements, 48 commits since 1.5.0

Source code(tar.gz)
Source code(zip)
flatc_windows_exe.zip(248.64 KB)
v1.5.0(Jan 3, 2017)
A summary of what is in this release since 1.4.0:

GRPC support for Go.

C# accessors now based on structs (generates less garbage).

Improved object API (e.g. choice of pointer types, external references).

Flatc can test for conformity against older schema.

In-place binary search lookups for C# and Java.

Documentation improvements.

Many other fixes and improvements, 133 commits since 1.4.0

Source code(tar.gz)
Source code(zip)
flatc_windows_exe.zip(239.70 KB)
v1.4.0(Aug 16, 2016)
A summary of what is in this release since 1.3.0:

Support for GRPC!

C++ now has an object API: read & write to generated C++ objects.

Mutation support in Go & JS.

Many improvements in name space handling and general code generation.

Libfuzzer based tests.

Documentation for C in the main project.

Many other fixes and improvements, 300 commits since 1.3

Source code(tar.gz)
Source code(zip)
flatc_windows_exe.zip(206.77 KB)
v1.3.0(Feb 3, 2016)
A summary of what is in this release since 1.2.0:

Support for PHP!

Much improved documentation: a tutorial shared by all languages.

API improvements for Python, C#, and others.

C++ code can now be built with GCC as low as 4.4, and doesn't rely on exceptions anymore.

JSON parser can now skip unknown fields.

Benchmark code available in benchmark branch.

Many other fixes and improvements, 140+ commits since 1.2

Source code(tar.gz)
Source code(zip)
flatc_windows_exe.zip(179.12 KB)
v1.2.0(Oct 28, 2015)
A summary of what is in this release since 1.1.0:

Support for JavaScript and Python!

A much improved C# and Go API and implementation.

Simple mutable FlatBuffers functionality (C++/Java/C#).

New reflection functionality: binary schemas, and more dynamic read/mutate (C++, relflection.h).

Much improved .proto parsing.

Many other fixes and improvements, 200+ commits since 1.1

Source code(tar.gz)
Source code(zip)
flatc_windows_exe.zip(158.76 KB)
v1.1.0(Apr 1, 2015)
A summary of what is in this release since 1.0.0:

An extensive overhaul to the Java API.

Out-of-the-box support for C# and Go.

An optional verifier to make FlatBuffers practical in untrusted scenarios.

.proto parsing for easier migration from Protocol Buffers.

Optional manual assignment of field IDs.

Dictionary functionality through binary search on a key field.

Bug fixes and other improvements thanks to 200+ commits from 28 contributors.

Source code(tar.gz)
Source code(zip)
flatc_windows_exe.zip(107.33 KB)
v1.0.3(Oct 22, 2014)
This is an interim release before 1.1.0, with important bug fixes and a few new features:

C# is now supported.

flatc is able to convert .proto files to FlatBuffer schemas for easier migration from Protocol Buffers.

Java FlatBuffers functionality is now more friendly, with better generated code for tables and vectors in particular.

Support for required fields.

C++ enums are now strongly typed.

Option to generate dependent includes in C++ ... and many smaller fixes.

Source code(tar.gz)
Source code(zip)
flatc_windows_exe.zip(91.12 KB)
v1.0.2(Sep 3, 2014)
This is an interim release before 1.1.0, with important bug fixes and a few new features:

Schemas can now include other schemas directly.

Schemas can refer to types from unrelated namespaces.

JSON parsing & writing supports unicode escape codes (\u).

Enum value prefixing in C++ is now an option.

Source code(tar.gz)
Source code(zip)
flatc_windows_exe.zip(79.31 KB)
v1.0.1(Aug 18, 2014)
This is an interim release before 1.1.0, with important bug fixes and a few new features:

Initial support for the Go programming language.

Verification functionality allows safe access of buffers from untrusted sources.

File identification allows convenient magic-number sanity checks when a FlatBuffer is used as a file format.

Ability to manually assign field id's in the schema.

Improved enum parsing functionality in JSON.

bit_flags for enums.

Nested FlatBuffer support.

Vector iterators.

Source code(tar.gz)
Source code(zip)
v1.0.0(Jun 17, 2014)

This is the initial release. See http://google.github.io/flatbuffers/ for more.
Source code(tar.gz)
Source code(zip)

FlatBuffers: Memory Efficient Serialization Library

Related tags

Overview

FlatBuffers

Supported operating systems

Supported programming languages

Contribution

Licensing

Comments

Motivation

How do we represent this in the schema file?

Change to Schema Grammar:

How do we represent this in the binary?

(A) Non-Presence means None

~(B) Some Sentinel value means None~

How do we represent this in every language API?

Out of scope

TODO

TODO

Documentation

TODO (undecided)

What's the change?

See also

Releases(v22.12.06)

v22.12.06(Dec 7, 2022)

What's Changed

New Contributors

v22.11.23(Nov 23, 2022)

What's Changed

v22.11.22(Nov 22, 2022)

What's Changed

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v22.10.26(Oct 26, 2022)

What's Changed

v22.10.25(Oct 26, 2022)

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v22.9.29(Sep 30, 2022)

What's Changed

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v22.9.24(Sep 27, 2022)

What's Changed

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v2.0.8(Aug 30, 2022)

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v2.0.7(Aug 23, 2022)

What's Changed

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v2.0.0(May 10, 2021)

v1.12.0(Mar 12, 2020)

v1.11.0(Apr 24, 2019)

v1.10.0(Oct 3, 2018)

v1.9.0(Apr 5, 2018)

v1.8.0(Nov 20, 2017)

v1.7.1(Jun 20, 2017)

v1.7.0(Jun 17, 2017)

v1.6.0(Feb 15, 2017)

v1.5.0(Jan 3, 2017)

v1.4.0(Aug 16, 2016)

v1.3.0(Feb 3, 2016)

v1.2.0(Oct 28, 2015)

v1.1.0(Apr 1, 2015)

v1.0.3(Oct 22, 2014)

v1.0.2(Sep 3, 2014)

v1.0.1(Aug 18, 2014)

v1.0.0(Jun 17, 2014)

Owner

Google

Protocol Buffers - Google's data interchange format

A lightweight library for converting complex objects to and from simple Python datatypes.

🦉 Modern high-performance serialization utilities for Python (JSON, MessagePack, Pickle)

Python bindings for the simdjson project.

Fast, correct Python JSON library supporting dataclasses, datetimes, and numpy

Extended pickling support for Python objects

serialize all of python

simplejson is a simple, fast, extensible JSON encoder/decoder for Python

Python wrapper around rapidjson

Corset is a web-based data selection portal that helps you getting relevant data from massive amounts of parallel data.

MessagePack serializer implementation for Python msgpack.org[Python]