## 6.0.2

* [kotlin] Fixes a bug with a missed line break between generated statements in the `fromList` function of the companion object.

## 6.0.1

* [c++] Fixes most non-class arguments and return values in Flutter APIs. The
  types of arguments and return values have changed, so this may require updates
  to existing code.

## 6.0.0

* Creates StructuredGenerator class and implements it on all platforms.

## 5.0.1

* [c++] Fixes undefined behavior in `@async` methods.

## 5.0.0

* Creates new Generator classes for each language.

## 4.2.16

* [swift] Fixes warnings with `Object` parameters.
* [dart] Fixes warnings with `Object` return values.
* [c++] Generation of APIs that use `Object` no longer fails.

## 4.2.15

* Relocates generator classes. (Reverted)

## 4.2.14

* [c++] Fixes reply sending non EncodableValue wrapped lists.

## 4.2.13

* Add documentation comment support for Enum members.

## 4.2.12

* Updates serialization to use lists instead of maps to improve performance.

## 4.2.11

* [swift] Fixes compressed list data types.

## 4.2.10

* Changes generated Java enum field to be final.

## 4.2.9

* [kotlin] Fixes a bug with some methods that return `void`.

## 4.2.8

* Adds the ability to use `runWithOptions` entrypoint to allow external libraries to use the pigeon easier.

## 4.2.7

* [swift] Fixes a bug when calling methods that return `void`.

## 4.2.6

* Fixes bug with parsing documentation comments that start with '/'.

## 4.2.5

* [dart] Fixes enum parameter handling in Dart test API class.

## 4.2.4

* [kotlin] Fixes Kotlin generated sync host api error.

## 4.2.3

* [java] Adds assert `args != null`.
* [java] Changes the args of a single element to `ArrayList` from `Arrays.asList` to `Collections.singletonList`.
* [java] Removes cast for `Object`.

## 4.2.2

* Removes unneeded custom codecs for all languages.

## 4.2.1

* Adds documentation comment support for Kotlin.

## 4.2.0

* Adds experimental support for Kotlin generation.

## 4.1.1

* [java] Adds missing `@NonNull` annotations to some methods.

## 4.1.0

* Adds documentation comment support for all currently supported languages.

## 4.0.3

* [swift] Makes swift output work on macOS.

## 4.0.2

* Fixes lint warnings.

## 4.0.1

* Exposes `SwiftOptions`.

## 4.0.0

* [java] **BREAKING CHANGE**: Changes style for enum values from camelCase to snake_case.
  Generated java enum values will now always be in upper snake_case.

## 3.2.9

* Updates text theme parameters to avoid deprecation issues.

## 3.2.8

* [dart] Deduces the correct import statement for Dart test files made with
  `dartHostTestHandler` instead of relying on relative imports.

## 3.2.7

* Requires `analyzer 4.4.0`, and replaces use of deprecated APIs.

## 3.2.6

* [java] Fixes returning int values from FlutterApi methods that fit in 32 bits.

## 3.2.5

* [c++] Fixes style issues in `FlutterError` and `ErrorOr`. The names and
  visibility of some members have changed, so this may require updates
  to existing code.

## 3.2.4

* [c++] Fixes most non-class arguments and return values in host APIs. The
  types of arguments and return values have changed, so this may require updates
  to existing code.

## 3.2.3

* Adds `unnecessary_import` to linter ignore list in generated dart tests.

## 3.2.2

* Adds `unnecessary_import` to linter ignore list for `package:flutter/foundation.dart`.

## 3.2.1

* Removes `@dart = 2.12` from generated Dart code.

## 3.2.0

* Adds experimental support for Swift generation.

## 3.1.7

* [java] Adds option to add javax.annotation.Generated annotation.

## 3.1.6

* Supports newer versions of `analyzer`.

## 3.1.5

* Fixes potential crash bug when using a nullable nested type that has nonnull
  fields in ObjC.

## 3.1.4

* [c++] Adds support for non-nullable fields, and fixes some issues with
  nullable fields. The types of some getters and setter have changed, so this
  may require updates to existing code.

## 3.1.3

* Adds support for enums in arguments to methods for HostApis.

## 3.1.2

* [c++] Fixes minor style issues in generated code. This includes the naming of
  generated methods and arguments, so will require updates to existing code.

## 3.1.1

* Updates for non-nullable bindings.

## 3.1.0

* [c++] Adds C++ code generator.

## 3.0.4

* [objc] Simplified some code output, including avoiding Xcode warnings about
  using `NSNumber*` directly as boolean value.
* [tests] Moved test script to enable CI.

## 3.0.3

* Adds ability for generators to do AST validation.  This can help generators
  without complete implementations to report gaps in coverage.

## 3.0.2

* Fixes non-nullable classes and enums as fields.
* Fixes nullable collections as return types.

## 3.0.1

* Enables NNBD for the Pigeon tool itself.
* [tests] Updates legacy Dart commands.

## 3.0.0

* **BREAKING CHANGE**: Removes the `--dart_null_safety` flag. Generated Dart
  now always uses nullability annotations, and thus requires Dart 2.12 or later.

## 2.0.4

* Fixes bug where Dart `FlutterApi`s would assert that a nullable argument was nonnull.

## 2.0.3

* Makes the generated Java Builder class final.

## 2.0.2

* Fixes Java crash for nullable nested type.

## 2.0.1

* Adds support for TaskQueues for serial background execution.

## 2.0.0

* Implements nullable parameters.
* **BREAKING CHANGE** - Nonnull parameters to async methods on HostApis for ObjC
  now have the proper nullability hints.

## 1.0.19

* Implements nullable return types.

## 1.0.18

* [front-end] Fix error caused by parsing `copyrightHeaders` passed to options in `@ConfigurePigeon`.

## 1.0.17

* [dart_test] Adds missing linter ignores.
* [objc] Factors out helper function for reading from NSDictionary's.
* [objc] Renames static variables to match Google style.

## 1.0.16

* Updates behavior of run\_tests.dart with no arguments.
* [debugging] Adds `ast_out` to help with debugging the compiler front-end.
* [front-end, dart] Adds support for non-null fields in data classes in the
  front-end parser and the Dart generator (unsupported languages ignore the
  designation currently).
* [front-end, dart, objc, java] Adds support for non-null fields in data
  classes.

## 1.0.15

* [java] Fix too little information when having an exception

## 1.0.14

* [tests] Port several generator tests to run in Dart over bash

## 1.0.13

* [style] Fixes new style rules for Dart analyzer.

## 1.0.12

* [java] Fixes enum support for null values.

## 1.0.11

* [ci] Starts transition to a Dart test runner, adds windows support.
* [front-end] Starts issuing an error if enums are used in type arguments.
* [front-end] Passes through all enums, referenced or not so they can be used as
  a work around for direct enum support.

## 1.0.10

* [front-end] Made sure that explicit use of Object actually creates the codec
  that can represent custom classes.

## 1.0.9

* [dart] Fixed cast exception that can happen with primitive data types with
  type arguments in FlutterApi's.

## 1.0.8

* [front-end] Started accepting explicit Object references in type arguments.
* [codecs] Fixed nuisance where duplicate entries could show up in custom codecs.

## 1.0.7

* [front-end] Fixed bug where nested classes' type arguments aren't included in
  the output (generated class and codec).

## 1.0.6

* Updated example README for set up steps.

## 1.0.5

* [java] Fixed bug when using Integer arguments to methods declared with 'int'
  arguments.

## 1.0.4

* [front-end] Fixed bug where codecs weren't generating support for types that
  only show up in type arguments.

## 1.0.3

* [objc] Updated assert message for incomplete implementations of protocols.

## 1.0.2

* [java] Made it so `@async` handlers in `@HostApi()` can report errors
  explicitly.

## 1.0.1

* [front-end] Fixed bug where classes only referenced as type arguments for
  generics weren't being generated.

## 1.0.0

* Started allowing primitive data types as arguments and return types.
* Generics support.
* Support for functions with more than one argument.
* [command-line] Added `one_language` flag for allowing Pigeon to only generate
  code for one platform.
* [command-line] Added the optional sdkPath parameter for specifying Dart SDK
  path.
* [dart] Fixed copyright headers for Dart test output.
* [front-end] Added more errors for incorrect usage of Pigeon (previously they
  were just ignored).
* [generators] Moved Pigeon to using a custom codec which allows collection
  types to contain custom classes.
* [java] Fixed NPE in Java generated code for nested types.
* [objc] **BREAKING CHANGE:** logic for generating Objective-C selectors has
  changed. `void add(Input value)` will now translate to
  `-(void)addValue:(Input*)value`, methods with no arguments will translate to
  `...WithError:` or `...WithCompletion:`.
* [objc] Added `@ObjCSelector` for specifying custom objc selectors.

## 0.3.0

* Updated the front-end parser to use dart
  [`analyzer`](https://pub.dev/packages/analyzer) instead of `dart:mirrors`.
  `dart:mirrors` doesn't support null-safe code so there were a class of
  features we couldn't implement without this migration.
* **BREAKING CHANGE** - the `configurePigeon` function has been migrated to a
  `@ConfigurePigeon` annotation.  See `./pigeons/message.dart` for an example.
  The annotation can be attached to anything in the file to take effect.
* **BREAKING CHANGE** - Now Pigeon files must be in one file per invocation of
  Pigeon.  For example, the classes your APIs use must be in the same file as
  your APIs.  If your Pigeon file imports another source file, it won't actually
  import it.

## 0.2.4

* bugfix in front-end parser for recursively referenced datatypes.

## 0.2.3

* bugfix in iOS async handlers of functions with no arguments.

## 0.2.2

* Added support for enums.

## 0.2.1

* Java: Fixed issue where multiple async HostApis can generate multiple Result interfaces.
* Dart: Made it so you can specify the BinaryMessenger of the generated APIs.

## 0.2.0

* **BREAKING CHANGE** - Pigeon files must be null-safe now.  That means the
  fields inside of the classes must be declared nullable (
  [non-null fields](https://github.com/flutter/flutter/issues/59118) aren't yet
  supported).  Migration example:

```dart
// Version 0.1.x
class Foo {
  int bar;
  String baz;
}

// Version 0.2.x
class Foo {
  int? bar;
  String? baz;
}
```

* **BREAKING CHANGE** - The default output from Pigeon is now null-safe.  If you
  want non-null-safe code you must provide the `--no-dart_null_safety` flag.
* The Pigeon source code is now null-safe.
* Fixed niladic non-value returning async functions in the Java generator.
* Made `runCommandLine` return an the status code.

## 0.1.24

* Moved logic from bin/ to lib/ to help customers wrap up the behavior.
* Added some more linter ignores for Dart.

## 0.1.23

* More Java linter and linter fixes.

## 0.1.22

* Java code generator enhancements:
  * Added linter tests to CI.
  * Fixed some linter issues in the Java code.

## 0.1.21

* Fixed decode method on generated Flutter classes that use null-safety and have
  null values.

## 0.1.20

* Implemented `@async` HostApi's for iOS.
* Fixed async FlutterApi methods with void return.

## 0.1.19

* Fixed a bug introduced in 0.1.17 where methods without arguments were
  no longer being called.

## 0.1.18

* Null safe requires Dart 2.12.

## 0.1.17

* Split out test code generation for Dart into a separate file via the
  --dart_test_out flag.

## 0.1.16

* Fixed running in certain environments where NNBD is enabled by default.

## 0.1.15

* Added support for running in versions of Dart that support NNBD.

## 0.1.14

* [Windows] Fixed executing from drives other than C:.

## 0.1.13

* Fixed execution on Windows with certain setups where Dart didn't allow
  backslashes in `import` statements.

## 0.1.12

* Fixed assert failure with creating a PlatformException as a result of an
  exception in Java handlers.

## 0.1.11

* Added flag to generate null safety annotated Dart code `--dart_null_safety`.
* Made it so Dart API setup methods can take null.

## 0.1.10+1

* Updated the examples page.

## 0.1.10

* Fixed bug that prevented running `pigeon` on Windows (introduced in `0.1.8`).

## 0.1.9

* Fixed bug where executing pigeon without arguments would crash (introduced in 0.1.8).

## 0.1.8

* Started spawning pigeon_lib in an isolate instead of a subprocess.  The
  subprocess could have lead to errors if the dart version on $PATH didn't match
  the one that comes with flutter.

## 0.1.7

* Fixed Dart compilation for later versions that support null safety, opting out
  of it for now.
* Fixed nested types in the Java runtime.

## 0.1.6

* Fixed unused variable linter warning in Dart code under certain conditions.

## 0.1.5

* Made array datatypes correctly get imported and exported avoiding the need to
  add extra imports to generated code.

## 0.1.4

* Fixed nullability for NSError's in generated objc code.
* Fixed nullability of nested objects in the Dart generator.
* Added test to make sure the pigeon version is correct in generated code headers.

## 0.1.3

* Added error message if supported datatypes are used as arguments or return
  types directly, without an enclosing class.
* Added support for List and Map datatypes in Java and Objective-C targets.

## 0.1.2+1

* Updated the Readme.md.

## 0.1.2

* Removed static analysis warnings from generated Java code.

## 0.1.1

* Fixed issue where nested types didn't work if they weren't present in the Api.

## 0.1.0

* Added pigeon.dart.
* Fixed some Obj-C linter problems.
* Added the ability to generate a mock handler in Dart.

## 0.1.0-experimental.11

* Fixed setting an api to null in Java.

## 0.1.0-experimental.10

* Added support for void argument functions.
* Added nullability annotations to generated objc code.

## 0.1.0-experimental.9

* Added e2e tests for iOS.

## 0.1.0-experimental.8

* Renamed `setupPigeon` to `configurePigeon`.

## 0.1.0-experimental.7

* Suppressed or got rid of warnings in generated Dart code.

## 0.1.0-experimental.6

* Added support for void return types.

## 0.1.0-experimental.5

* Fixed runtime exception in Android with values of ints less than 2^32.
* Incremented codegen version warning.

## 0.1.0-experimental.4

* Fixed primitive types for Android Java.

## 0.1.0-experimental.3

* Added support for for Android Java.

## 0.1.0-experimental.2

* Added Host->Flutter calls for Objective-C

## 0.1.0-experimental.1

* Fixed warning in the README.md

## 0.1.0-experimental.0

* Initial release.