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odroe / otp

An implementation of the One-Time Password (OTP) algorithm in Dart.
MIT License
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chore(deps): update dependency dart to v3 #202

Closed renovate[bot] closed 6 months ago

renovate[bot] commented 6 months ago

Mend Renovate

This PR contains the following updates:

Package Update Change
dart (source) major >=2.17.0 <3.0.0 -> <4.0.0

Release Notes

dart-lang/sdk (dart) ### [`v3.3.4`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#334---2024-04-17) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.3.3...3.3.4) This is a patch release that: - Fixes an issue with JS interop in dart2wasm where JS interop methods that used the enclosing library's `@JS` annotation were actually using the invocation's enclosing library's `@JS` annotation. (issue [#​55430]). [#​55430]: https://togithub.com/dart-lang/sdk/issues/55430 ### [`v3.3.3`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#333---2024-03-27) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.3.2...3.3.3) This is a patch release that: - Fixes an issue where dart vm crashed when running on pre-SSE41 older CPUs on Windows (issue [#​55211][]). [#​55211]: https://togithub.com/dart-lang/sdk/issues/55211 ### [`v3.3.2`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#332---2024-03-20) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.3.1...3.3.2) This is a patch release that: - Fixes an issue in the CFE that placed some structural parameter references out of their context in the code restored from dill files, causing crashes in the incremental compiler whenever it restored a typedef from dill such that the typedef contained a generic function type on its right-hand side (issue [#​55158][]). - Fixes an issue in the CFE that prevented redirecting factories from being resolved in initializers of extension types (issue [#​55194][]). - Fixes an issues with VM's implementation of `DateTime.timeZoneName` on Windows, which was checking whether current date is in the summer or standard time rather than checking if the given moment is in the summer or standard time (issue [#​55240][]). [#​55158]: https://togithub.com/dart-lang/sdk/issues/55158 [#​55194]: https://togithub.com/dart-lang/sdk/issues/55194 [#​55240]: https://togithub.com/dart-lang/sdk/issues/55240 ### [`v3.3.1`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#331---2024-03-06) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.3.0...3.3.1) This is a patch release that: - Fixes an issue in dart2js where object literal constructors in interop extension types would fail to compile without an `@JS` annotation on the library (issue [#​55057][]). - Disallows certain types involving extension types from being used as the operand of an `await` expression, unless the extension type itself implements `Future` (issue [#​55095][]). [#​55057]: https://togithub.com/dart-lang/sdk/issues/55057 [#​55095]: https://togithub.com/dart-lang/sdk/issues/55095 ### [`v3.3.0`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#330) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.2.6...3.3.0) ##### Language Dart 3.3 adds [extension types] to the language. To use them, set your package's \[SDK constraint]\[language version] lower bound to 3.3 or greater (`sdk: '^3.3.0'`). ##### Extension types [extension types]: https://togithub.com/dart-lang/language/issues/2727 An *extension type* wraps an existing type with a different, static-only interface. It works in a way which is in many ways similar to a class that contains a single final instance variable holding the wrapped object, but without the space and time overhead of an actual wrapper object. Extension types are introduced by *extension type declarations*. Each such declaration declares a new named type (not just a new name for the same type). It declares a *representation variable* whose type is the *representation type*. The effect of using an extension type is that the *representation* (that is, the value of the representation variable) has the members declared by the extension type rather than the members declared by its "own" type (the representation type). Example: ```dart extension type Meters(int value) { String get label => '${value}m'; Meters operator +(Meters other) => Meters(value + other.value); } void main() { var m = Meters(42); // Has type `Meters`. var m2 = m + m; // OK, type `Meters`. // int i = m; // Compile-time error, wrong type. // m.isEven; // Compile-time error, no such member. assert(identical(m, m.value)); // Succeeds. } ``` The declaration `Meters` is an extension type that has representation type `int`. It introduces an implicit constructor `Meters(int value);` and a getter `int get value`. `m` and `m.value` is the very same object, but `m` has type `Meters` and `m.value` has type `int`. The point is that `m` has the members of `Meters` and `m.value` has the members of `int`. Extension types are entirely static, they do not exist at run time. If `o` is the value of an expression whose static type is an extension type `E` with representation type `R`, then `o` is just a normal object whose run-time type is a subtype of `R`, exactly like the value of an expression of type `R`. Also the run-time value of `E` is `R` (for example, `E == R` is true). In short: At run time, an extension type is erased to the corresponding representation type. A method call on an expression of an extension type is resolved at compile-time, based on the static type of the receiver, similar to how extension method calls work. There is no virtual or dynamic dispatch. This, combined with no memory overhead, means that extension types are zero-cost wrappers around their representation value. While there is thus no performance cost to using extension types, there is a safety cost. Since extension types are erased at compile time, run-time type tests on values that are statically typed as an extension type will check the type of the representation object instead, and if the type check looks like it tests for an extension type, like `is Meters`, it actually checks for the representation type, that is, it works exactly like `is int` at run time. Moreover, as mentioned above, if an extension type is used as a type argument to a generic class or function, the type variable will be bound to the representation type at run time. For example: ```dart void main() { var meters = Meters(3); // At run time, `Meters` is just `int`. print(meters is int); // Prints "true". print([] is List); // Prints "true". // An explicit cast is allowed and succeeds as well: List meterList = [1, 2, 3] as List; print(meterList[1].label); // Prints "2m". } ``` Extension types are useful when you are willing to sacrifice some run-time encapsulation in order to avoid the overhead of wrapping values in instances of wrapper classes, but still want to provide a different interface than the wrapped object. An example of that is interop, where you may have data that are not Dart objects to begin with (for example, raw JavaScript objects when using JavaScript interop), and you may have large collections of objects where it's not efficient to allocate an extra object for each element. ##### Other changes - **Breaking Change** [#​54056][]: The rules for private field promotion have been changed so that an abstract getter is considered promotable if there are no conflicting declarations. There are no conflicting declarations if there are no non-final fields, external fields, concrete getters, or `noSuchMethod` forwarding getters with the same name in the same library. This makes the implementation more consistent and allows type promotion in a few rare scenarios where it wasn't previously allowed. It is unlikely, but this change could cause a breakage by changing an inferred type in a way that breaks later code. For example: ```dart class A { int? get _field; } class B extends A { final int? _field; B(this._field); } test(A a) { if (a._field != null) { var x = a._field; // Previously had type `int?`; now has type `int` ... x = null; // Previously allowed; now causes a compile-time error. } } ``` Affected code can be fixed by adding an explicit type annotation. For example, in the above snippet, `var x` can be changed to `int? x`. It's also possible that some continuous integration configurations might fail if they have been configured to treat warnings as errors, because the expanded type promotion could lead to one of the following warnings: - `unnecessary_non_null_assertion` - `unnecessary_cast` - `invalid_null_aware_operator` These warnings can be addressed in the usual way, by removing the unnecessary operation in the first two cases, or changing `?.` to `.` in the third case. To learn more about other rules surrounding type promotion, check out the guide on [Fixing type promotion failures][]. [#​54056]: https://togithub.com/dart-lang/sdk/issues/54056 [Fixing type promotion failures]: https://dart.dev/tools/non-promotion-reasons ##### Libraries ##### `dart:core` - `String.fromCharCodes` now allow `start` and `end` to be after the end of the `Iterable` argument, just like `skip` and `take` does on an `Iterable`. ##### `dart:ffi` - In addition to functions, `@Native` can now be used on fields. - Allow taking the address of native functions and fields via `Native.addressOf`. - The `elementAt` pointer arithmetic extension methods on core `Pointer` types are now deprecated. Migrate to the new `-` and `+` operators instead. - The experimental and deprecated `@FfiNative` annotation has been removed. Usages should be updated to use the `@Native` annotation. ##### `dart:js_interop` - **Breaking Change in the representation of JS types** [#​52687][]: JS types like `JSAny` were previously represented using a custom erasure of `@staticInterop` types that were compiler-specific. They are now represented as extension types where their representation types are compiler-specific. This means that user-defined `@staticInterop` types that implemented `JSAny` or `JSObject` can no longer do so and need to use `JSObject.fromInteropObject`. Going forward, it's recommended to use extension types to define interop APIs. Those extension types can still implement JS types. - **JSArray and JSPromise generics**: `JSArray` and `JSPromise` are now generic types whose type parameter is a subtype of `JSAny?`. Conversions to and from these types are changed to account for the type parameters of the Dart or JS type, respectively. - **Breaking Change in names of extensions**: Some `dart:js_interop` extension members are moved to different extensions on the same type or a supertype to better organize the API surface. See `JSAnyUtilityExtension` and `JSAnyOperatorExtension` for the new extensions. This shouldn't make a difference unless the extension names were explicitly used. - Add `importModule` to allow users to dynamically import modules using the JS `import()` expression. [#​52687]: https://togithub.com/dart-lang/sdk/issues/52687 ##### `dart:js_interop_unsafe` - Add `has` helper to make `hasProperty` calls more concise. ##### `dart:typed_data` - **BREAKING CHANGE** ([https://github.com/dart-lang/sdk/issues/53218](https://togithub.com/dart-lang/sdk/issues/53218)) The unmodifiable view classes for typed data are deprecated. Instead of using the constructors for these classes to create an unmodifiable view, e.g. ```dart Uint8List data = ... final readOnlyView = UnmodifiableUint8ListView(data); ``` use the new `asUnmodifiableView()` methods: ```dart Uint8List data = ... final readOnlyView = data.asUnmodifiableView(); ``` The reason for this change is to allow more flexibility in the implementation of typed data so the native and web platforms can use different strategies for ensuring typed data has good performance. The deprecated types will be removed in a future Dart version. ##### `dart:nativewrappers` - **Breaking Change** [#​51896][]: The NativeWrapperClasses are marked `base` so that none of their subtypes can be implemented. Implementing subtypes can lead to crashes when passing such native wrapper to a native call, as it will try to unwrap a native field that doesn't exist. [#​51896]: https://togithub.com/dart-lang/sdk/issues/51896 ##### Tools ##### Dart command line - The `dart create` command now uses v3 of `package:lints`, including multiple new recommended lints by default. To learn more about the updated collection of lints, check out the `package:lints` [3.0.0 changelog entry][lints-3-0]. [lints-3-0]: https://pub.dev/packages/lints/changelog#300 ##### DevTools - Updated DevTools to version 2.31.1 from 2.28.1. To learn more, check out the release notes for versions [2.29.0][devtools-2-29-0], [2.30.0][devtools-2-30-0], and [2.31.0][devtools-2-31-0]. [devtools-2-29-0]: https://docs.flutter.dev/tools/devtools/release-notes/release-notes-2.29.0 [devtools-2-30-0]: https://docs.flutter.dev/tools/devtools/release-notes/release-notes-2.30.0 [devtools-2-31-0]: https://docs.flutter.dev/tools/devtools/release-notes/release-notes-2.31.0 ##### Wasm compiler (dart2wasm) - **Breaking Change** [#​54004][]: `dart:js_util`, `package:js`, and `dart:js` are now disallowed from being imported when compiling with `dart2wasm`. Prefer using `dart:js_interop` and `dart:js_interop_unsafe`. [#​54004]: https://togithub.com/dart-lang/sdk/issues/54004 ##### Development JavaScript compiler (DDC) - Type arguments of `package:js` interop types are now printed as `any` instead of being omitted. This is simply a change to the textual representation of package js types that have type arguments. These type arguments are still completely ignored by the type system at runtime. - Removed "implements <...>" text from the Chrome custom formatter display for Dart classes. This information provides little value and keeping it imposes an unnecessary maintenance cost. ##### Production JavaScript compiler (dart2js) - **Breaking Change** [#​54201][]: The `Invocation` that is passed to `noSuchMethod` will no longer have a minified `memberName`, even when dart2js is invoked with `--minify`. See [#​54201][] for more details. [#​54201]: https://togithub.com/dart-lang/sdk/issues/54201 ##### Analyzer - You can now suppress diagnostics in `pubspec.yaml` files by adding an `# ignore: ` comment. - Invalid `dart doc` comment directives are now reported. - The [`flutter_style_todos`][flutter_style_todos] lint now has a quick fix. [`flutter_style_todos`]: https://dart.dev/lints/flutter_style_todos ##### Linter - Removed the `iterable_contains_unrelated_type` and `list_remove_unrelated_type` lints. Consider migrating to the expanded [`collection_methods_unrelated_type`][collection_methods_unrelated_type] lint. - Removed various lints that are no longer necessary with sound null safety: - `always_require_non_null_named_parameters` - `avoid_returning_null`, - `avoid_returning_null_for_future` [`collection_methods_unrelated_type`]: https://dart.dev/lints/collection_methods_unrelated_type ### [`v3.2.6`](https://togithub.com/dart-lang/sdk/compare/3.2.5...3.2.6) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.2.5...3.2.6) ### [`v3.2.5`](https://togithub.com/dart-lang/sdk/compare/3.2.4...3.2.5) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.2.4...3.2.5) ### [`v3.2.4`](https://togithub.com/dart-lang/sdk/compare/3.2.3...3.2.4) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.2.3...3.2.4) ### [`v3.2.3`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#323---2023-12-06) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.2.2...3.2.3) This is a patch release that: - Disallows final fields to be used in a constant context during analysis (issue [#​54232][]). - Upgrades Dart DevTools to version 2.28.4 (issue [#​54213][]). - Fixes new AOT snapshots in the SDK failing with SIGILL in ARM environments that don't support the integer division instructions or x86-64 environments that don't support SSE4.1 (issue [#​54215][]). [#​54232]: https://togithub.com/dart-lang/sdk/issues/54232 [#​54213]: https://togithub.com/dart-lang/sdk/issues/54213 [#​54215]: https://togithub.com/dart-lang/sdk/issues/54215 ### [`v3.2.2`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#322---2023-11-29) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.2.1...3.2.2) This is a patch release that: - Adjusts the nullablity computations in the implementation of the upper bound algorithm in the compiler frontend (issue [#​53999][]). - Fixes missing closure code completion entries for function parameters for LSP-based editors like VS Code (issue [#​54112][]). [#​53999]: https://togithub.com/dart-lang/sdk/issues/53999 [#​54112]: https://togithub.com/dart-lang/sdk/issues/54112 ### [`v3.2.1`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#321---2023-11-22) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.2.0...3.2.1) This is a patch release that: - Fixes the left/mobile sidebar being empty on non-class pages in documentation generated with `dart doc` (issue [#​54073][]). - Fixes a JSON array parsing bug that causes a segmentation fault when `flutter test` is invoked with the `--coverage` flag (SDK issue [#​54059][], Flutter issue [#​124145][]). - Upgrades Dart DevTools to version 2.28.3 (issue [#​54085][]). [#​54073]: https://togithub.com/dart-lang/sdk/issues/54073 [#​54059]: https://togithub.com/dart-lang/sdk/issues/54059 [#​124145]: https://togithub.com/flutter/flutter/issues/124145 [#​54085]: https://togithub.com/dart-lang/sdk/issues/54085 ### [`v3.2.0`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#320---2023-11-15) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.1.5...3.2.0) ##### Language Dart 3.2 adds the following features. To use them, set your package's [SDK constraint][language version] lower bound to 3.2 or greater (`sdk: '^3.2.0'`). [language version]: https://dart.dev/guides/language/evolution - **Private field promotion**: In most circumstances, the types of private final fields can now be promoted by null checks and `is` tests. For example: ```dart class Example { final int? _privateField; Example(this._privateField); f() { if (_privateField != null) { // _privateField has now been promoted; you can use it without // null checking it. int i = _privateField; // OK } } } // Private field promotions also work from outside of the class: f(Example x) { if (x._privateField != null) { int i = x._privateField; // OK } } ``` To ensure soundness, a field is not eligible for field promotion in the following circumstances: - If it's not final (because a non-final field could be changed in between the test and the usage, invalidating the promotion). - If it's overridden elsewhere in the library by a concrete getter or a non-final field (because an access to an overridden field might resolve at runtime to the overriding getter or field). - If it's not private (because a non-private field might be overridden elsewhere in the program). - If it has the same name as a concrete getter or a non-final field in some other unrelated class in the library (because a class elsewhere in the program might extend one of the classes and implement the other, creating an override relationship between them). - If there is a concrete class `C` in the library whose interface contains a getter with the same name, but `C` does not have an implementation of that getter (such unimplemented getters aren't safe for field promotion, because they are implicitly forwarded to `noSuchMethod`, which might not return the same value each time it's called). - **Breaking Change** [#​53167][]: Use a more precise split point for refutable patterns. Previously, in an if-case statement, if flow analysis could prove that the scrutinee expression was guaranteed to throw an exception, it would sometimes fail to propagate type promotions implied by the pattern to the (dead) code that follows. This change makes the type promotion behavior of if-case statements consistent regardless of whether the scrutinee expression throws an exception. No live code is affected by this change, but there is a small chance that the change in types will cause a compile-time error to appear in some dead code in the user's project, where no compile-time error appeared previously. [#​53167]: https://togithub.com/dart-lang/sdk/issues/53167 ##### Libraries ##### `dart:async` - Added `broadcast` parameter to `Stream.empty` constructor. ##### `dart:cli` - **Breaking change** [#​52121][]: - `waitFor` is disabled by default and slated for removal in 3.4. Attempting to call this function will now throw an exception. Users that still depend on `waitFor` can enable it by passing `--enable_deprecated_wait_for` flag to the VM. [#​52121]: https://togithub.com/dart-lang/sdk/issues/52121 ##### `dart:convert` - **Breaking change** [#​52801][]: - Changed return types of `utf8.encode()` and `Utf8Codec.encode()` from `List` to `Uint8List`. [#​52801]: https://togithub.com/dart-lang/sdk/issues/52801 ##### `dart:developer` - Deprecated the `Service.getIsolateID` method. - Added `getIsolateId` method to `Service`. - Added `getObjectId` method to `Service`. ##### `dart:ffi` - Added the `NativeCallable.isolateLocal` constructor. This creates `NativeCallable`s with the same functionality as `Pointer.fromFunction`, except that `NativeCallable` accepts closures. - Added the `NativeCallable.keepIsolateAlive` method, which determines whether the `NativeCallable` keeps the isolate that created it alive. - All `NativeCallable` constructors can now accept closures. Previously `NativeCallable`s had the same restrictions as `Pointer.fromFunction`, and could only create callbacks for static functions. - **Breaking change** [#​53311][]: `NativeCallable.nativeFunction` now throws an error if is called after the `NativeCallable` has already been `close`d. Calls to `close` after the first are now ignored. [#​53311]: https://togithub.com/dart-lang/sdk/issues/53311 ##### `dart:io` - **Breaking change** [#​53005][]: The headers returned by `HttpClientResponse.headers` and `HttpRequest.headers` no longer include trailing whitespace in their values. - **Breaking change** [#​53227][]: Folded headers values returned by `HttpClientResponse.headers` and `HttpRequest.headers` now have a space inserted at the fold point. [#​53005]: https://dartbug.com/53005 [#​53227]: https://dartbug.com/53227 ##### `dart:isolate` - Added `Isolate.packageConfigSync` and `Isolate.resolvePackageUriSync` APIs. ##### `dart:js_interop` - **Breaking Change on JSNumber.toDart and Object.toJS**: `JSNumber.toDart` is removed in favor of `toDartDouble` and `toDartInt` to make the type explicit. `Object.toJS` is also removed in favor of `Object.toJSBox`. Previously, this function would allow Dart objects to flow into JS unwrapped on the JS backends. Now, there's an explicit wrapper that is added and unwrapped via `JSBoxedDartObject.toDart`. Similarly, `JSExportedDartObject` is renamed to `JSBoxedDartObject` and the extensions `ObjectToJSExportedDartObject` and `JSExportedDartObjectToObject` are renamed to `ObjectToJSBoxedDartObject` and `JSBoxedDartObjectToObject` in order to avoid confusion with `@JSExport`. - **Type parameters in external APIs**: Type parameters must now be bound to a static interop type or one of the `dart:js_interop` types like `JSNumber` when used in an external API. This only affects `dart:js_interop` classes and not `package:js` or other forms of JS interop. - **Subtyping `dart:js_interop` types**: `@staticInterop` types can subtype only `JSObject` and `JSAny` from the set of JS types in `dart:js_interop`. Subtyping other types from `dart:js_interop` would result in confusing type errors before, so this makes it a static error. - **Global context of `dart:js_interop` and `@staticInterop` APIs**: Static interop APIs will now use the same global context as non-static interop instead of `globalThis` to avoid a greater migration. Static interop APIs, either through `dart:js_interop` or the `@staticInterop` annotation, have used JavaScript's `globalThis` as the global context. This is relevant to things like external top-level members or external constructors, as this is the root context we expect those members to reside in. Historically, this was not the case in dart2js and DDC. We used either `self` or DDC's `global` in non-static interop APIs with `package:js`. So, static interop APIs will now use one of those global contexts. Functionally, this should matter in only a very small number of cases, like when using older browser versions. `dart:js_interop`'s `globalJSObject` is also renamed to `globalContext` and returns the global context used in the lowerings. - **Breaking Change on Types of `dart:js_interop` External APIs**: External JS interop APIs when using `dart:js_interop` are restricted to a set of allowed types. Namely, this includes the primitive types like `String`, JS types from `dart:js_interop`, and other static interop types (either through `@staticInterop` or extension types). - **Breaking Change on `dart:js_interop` `isNull` and `isUndefined`**: `null` and `undefined` can only be discerned in the JS backends. dart2wasm conflates the two values and treats them both as Dart null. Therefore, these two helper methods should not be used on dart2wasm and will throw to avoid potentially erroneous code. - **Breaking Change on `dart:js_interop` `typeofEquals` and `instanceof`**: Both APIs now return a `bool` instead of a `JSBoolean`. `typeofEquals` also now takes in a `String` instead of a `JSString`. - **Breaking Change on `dart:js_interop` `JSAny` and `JSObject`**: These types can only be implemented, and no longer extended, by user `@staticInterop` types. - **Breaking Change on `dart:js_interop` `JSArray.withLength`**: This API now takes in an `int` instead of `JSNumber`. ##### Tools ##### Development JavaScript compiler (DDC) - Applications compiled by DDC will no longer add members to the native JavaScript Object prototype. - **Breaking change for JS interop with Symbols and BigInts**: JavaScript `Symbol`s and `BigInt`s are now associated with their own interceptor and should not be used with `package:js` classes. These types were being intercepted with the assumption that they are a subtype of JavaScript's `Object`, but this is incorrect. This lead to erroneous behavior when using these types as Dart `Object`s. See [#​53106][] for more details. Use `dart:js_interop`'s `JSSymbol` and `JSBigInt` with extension types to interop with these types. ##### Production JavaScript compiler (dart2js) - **Breaking change for JS interop with Symbols and BigInts**: JavaScript `Symbol`s and `BigInt`s are now associated with their own interceptor and should not be used with `package:js` classes. These types were being intercepted with the assumption that they are a subtype of JavaScript's `Object`, but this is incorrect. This lead to erroneous behavior when using these types as Dart `Object`s. See [#​53106][] for more details. Use `dart:js_interop`'s `JSSymbol` and `JSBigInt` with extension types to interop with these types. [#​53106]: https://togithub.com/dart-lang/sdk/issues/53106 ##### Dart command line - The `dart create` command has a new `cli` template to quickly create Dart command-line applications with basic argument parsing capabilities. To learn more about using the template, run `dart help create`. ##### Dart format - Always split enum declarations containing a line comment. - Fix regression in splitting type annotations with library prefixes. - Support `--enable-experiment` command-line option to enable language experiments. ##### DevTools - Incorporated the [2.26.1][devtools-2-26-1], [2.27.0][devtools-2-27-0], and [2.28.1][devtools-2-28-1] releases of DevTools. [devtools-2-26-1]: https://docs.flutter.dev/tools/devtools/release-notes/release-notes-2.26.1 [devtools-2-27-0]: https://docs.flutter.dev/tools/devtools/release-notes/release-notes-2.27.0 [devtools-2-28-1]: https://docs.flutter.dev/tools/devtools/release-notes/release-notes-2.28.1 ##### Linter - Added the experimental [`annotate_redeclares`][annotate_redeclares] lint. - Marked the [`use_build_context_synchronously`][use_build_context_synchronously] lint as stable. [`annotate_redeclares`]: https://dart.dev/lints/annotate_redeclares [`use_build_context_synchronously`]: https://dart.dev/lints/use_build_context_synchronously ##### Pub - New option `dart pub upgrade --tighten` which will update dependencies' lower bounds in `pubspec.yaml` to match the current version. - The commands `dart pub get`/`add`/`upgrade` will now show if a dependency changed between direct, dev and transitive dependency. - The command `dart pub upgrade` no longer shows unchanged dependencies. ### [`v3.1.5`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#315---2023-10-25) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.1.4...3.1.5) This is a patch release that: - Fixes an issue affecting Dart compiled to JavaScript running in Node.js 21. A change in Node.js 21 affected the Dart Web compiler runtime. This patch release accommodates for those changes (issue [#​53810](https://togithub.com/dart-lang/sdk/issues/53810)). [#​53810]: https://togithub.com/dart-lang/sdk/issues/53810 ### [`v3.1.4`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#314---2023-10-18) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.1.3...3.1.4) This is a patch release that: - Fixes an issue in the Dart VM, users are not being able to see value of variables while debugging code (issue \[[#​53747](https://togithub.com/dart-lang/sdk/issues/53747)]). [#​53654]: https://togithub.com/dart-lang/sdk/issues/53747 ### [`v3.1.3`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#313---2023-09-27) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.1.2...3.1.3) This is a patch release that: - Fixes a bug in dart2js which would cause the compiler to crash when using `@staticInterop` `@anonymous` factory constructors with type parameters (see issue [#​53579] for more details). - The standalone Dart VM now exports symbols only for the Dart_\* embedding API functions, avoiding conflicts with other DSOs loaded into the same process, such as shared libraries loaded through `dart:ffi`, that may have different versions of the same symbols (issue \[[#​53503](https://togithub.com/dart-lang/sdk/issues/53503)]). - Fixes an issue with super slow access to variables while debugging. The fix avoids searching static functions in the imported libraries as references to members are fully resolved by the front-end. (issue [#​53541]) [#​53579]: https://togithub.com/dart-lang/sdk/issues/53579 [#​53267]: https://togithub.com/dart-lang/sdk/issues/53503 [#​53541]: https://togithub.com/dart-lang/sdk/issues/53541 ### [`v3.1.2`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#312---2023-09-13) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.1.1...3.1.2) This is a patch release that: - Fixes a bug in dart2js which crashed the compiler when a typed record pattern was used outside the scope of a function body, such as in a field initializer. For example `final x = { for (var (int a,) in someList) a: a };` (issue [#​53449]) - Fixes an expedient issue of users seeing an unhandled exception pause in the debugger, please [https://github.com/dart-lang/sdk/issues/53450](https://togithub.com/dart-lang/sdk/issues/53450)es/53450 for more details. The fix uses try/catch in lookupAddresses instead of Future error so that we don't see an unhandled exception pause in the debugger (issue [#​53450]) [#​53449]: https://togithub.com/dart-lang/sdk/issues/53449 [#​53450]: https://togithub.com/dart-lang/sdk/issues/53450 ### [`v3.1.1`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#311---2023-09-07) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.1.0...3.1.1) This is a patch release that: - Fixes a bug in the parser which prevented a record pattern from containing a nested record pattern, where the nested record pattern uses record destructuring shorthand syntax, for example `final ((:a, :b), c) = record;` (issue [#​53352]). [#​53352]: https://togithub.com/dart-lang/sdk/issues/53352 ### [`v3.1.0`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#310---2023-08-16) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.0.7...3.1.0) ##### Libraries ##### `dart:async` - **Breaking change** [#​52334][]: - Added the `interface` modifier to purely abstract classes: `MultiStreamController`, `StreamConsumer`, `StreamIterator` and `StreamTransformer`. As a result, these types can only be implemented, not extended or mixed in. [#​52334]: https://togithub.com/dart-lang/sdk/issues/52334 ##### `dart:core` - `Uri.base` on native platforms now respects `IOOverrides` overriding current directory ([#​39796][]). [#​39796]: https://togithub.com/dart-lang/sdk/issues/39796 ##### `dart:ffi` - Added the `NativeCallable` class, which can be used to create callbacks that allow native code to call into Dart code from any thread. See `NativeCallable.listener`. In future releases, `NativeCallable` will be updated with more functionality, and will become the recommended way of creating native callbacks for all use cases, replacing `Pointer.fromFunction`. ##### `dart:io` - **Breaking change** [#​51486][]: - Added `sameSite` to the `Cookie` class. - Added class `SameSite`. - **Breaking change** [#​52027][]: `FileSystemEvent` is [`sealed`](https://dart.dev/language/class-modifiers#sealed). This means that `FileSystemEvent` cannot be extended or implemented. - Added a deprecation warning when `Platform` is instantiated. - Added `Platform.lineTerminator` which exposes the character or characters that the operating system uses to separate lines of text, e.g., `"\r\n"` on Windows. [#​51486]: https://togithub.com/dart-lang/sdk/issues/51486 [#​52027]: https://togithub.com/dart-lang/sdk/issues/52027 ##### `dart:js_interop` - **Object literal constructors**: `ObjectLiteral` is removed from `dart:js_interop`. It's no longer needed in order to declare an object literal constructor with inline classes. As long as an external constructor has at least one named parameter, it'll be treated as an object literal constructor. If you want to create an object literal with no named members, use `{}.jsify()`. ##### Other libraries ##### `package:js` - **Breaking change to `@staticInterop` and `external` extension members**: `external` `@staticInterop` members and `external` extension members can no longer be used as tear-offs. Declare a closure or a non-`external` method that calls these members, and use that instead. - **Breaking change to `@staticInterop` and `external` extension members**: `external` `@staticInterop` members and `external` extension members will generate slightly different JS code for methods that have optional parameters. Whereas before, the JS code passed in the default value for missing optionals, it will now pass in only the provided members. This aligns with how JS parameters work, where omitted parameters are actually omitted. For example, calling `external void foo([int a, int b])` as `foo(0)` will now result in `foo(0)`, and not `foo(0, null)`. ##### Tools ##### DevTools - Incorporated the [2.24.0][devtools-2-24-0] and [2.25.0][devtools-2-25-0] releases of DevTools. [devtools-2-24-0]: https://docs.flutter.dev/tools/devtools/release-notes/release-notes-2.24.0 [devtools-2-25-0]: https://docs.flutter.dev/tools/devtools/release-notes/release-notes-2.25.0 ##### Linter - Added new static analysis lints you can [enable][enable-lints] in your package's `analysis_options.yaml` file: - [`no_self_assignments`](https://dart.dev/lints/no_self_assignments) - [`no_wildcard_variable_uses`](https://dart.dev/lints/no_wildcard_variable_uses) [enable-lints]: https://dart.dev/tools/analysis#enabling-linter-rules ### [`v3.0.7`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#307---2023-07-26) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.0.6...3.0.7) This is a patch release that: - Fixes a bug in dart2js which would cause certain uses of records to lead to bad codegen causing a `TypeError` or `NoSuchMethodError` to be thrown at runtime (issue [#​53001]). [#​53001]: https://togithub.com/dart-lang/sdk/issues/53001 ### [`v3.0.6`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#306---2023-07-12) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.0.5...3.0.6) This is a patch release that: - Fixes a flow in flow analysis that causes it to sometimes ignore destructuring assignments (issue [#​52767]). - Fixes an infinite loop in some web development compiles that include `is` or `as` expressions involving record types with named fields (issue [#​52869]). - Fixes a memory leak in Dart analyzer's file-watching (issue [#​52791]). - Fixes a memory leak of file system watcher related data structures (issue [#​52793]). [#​52767]: https://togithub.com/dart-lang/sdk/issues/52767 [#​52869]: https://togithub.com/dart-lang/sdk/issues/52869 [#​52791]: https://togithub.com/dart-lang/sdk/issues/52791 [#​52793]: https://togithub.com/dart-lang/sdk/issues/52793 ### [`v3.0.5`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#305---2023-06-14) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.0.4...3.0.5) This is a patch release that: - Fixes a bad cast in the frontend which can manifest as a crash in the dart2js `ListFactorySpecializer` during Flutter web builds (issue [#​52403]). [#​52403]: https://togithub.com/dart-lang/sdk/issues/52403 ### [`v3.0.4`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#304---2023-06-07) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.0.3...3.0.4) This is a patch release that: - `dart format` now handles formatting nullable record types with no fields (dart_style issue [#​1224]). - Fixes error when using records when targeting the web in development mode (issue [#​52480]). [#​1224]: https://togithub.com/dart-lang/dart_style/issues/1224 [#​52480]: https://togithub.com/dart-lang/sdk/issues/52480 ### [`v3.0.3`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#303---2023-02-07) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.0.2...3.0.3) This is a patch release that: - Fixes an AOT compiler crash when generating an implicit getter returning an unboxed record (issue [#​52449]). - Fixes a situation in which variables appearing in multiple branches of an or-pattern might be erroneously reported as being mismatched (issue [#​52373]). - Adds missing `interface` modifiers on the purely abstract classes `MultiStreamController`, `StreamConsumer`, `StreamIterator` and `StreamTransformer` (issue [#​52334]). - Fixes an error during debugging when `InternetAddress.tryParse` is used (issue [#​52423]). - Fixes a VM issue causing crashes on hot reload (issue [#​126884]). - Improves linter support (issue [#​4195]). - Fixes an issue in variable patterns preventing users from expressing a pattern match using a variable or wildcard pattern with a nullable record type (issue [#​52439]). - Updates warnings and provide instructions for updating the Dart pub cache on Windows (issue [#​52386]). [#​52373]: https://togithub.com/dart-lang/sdk/issues/52373 [#​52334]: https://togithub.com/dart-lang/sdk/issues/52334 [#​52423]: https://togithub.com/dart-lang/sdk/issues/52423 [#​126884]: https://togithub.com/flutter/flutter/issues/126884 [#​4195]: https://togithub.com/dart-lang/linter/issues/4195 [#​52439]: https://togithub.com/dart-lang/sdk/issues/52439 [#​52449]: https://togithub.com/dart-lang/sdk/issues/52449 [#​52386]: https://togithub.com/dart-lang/sdk/issues/52386 ### [`v3.0.2`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#302---2023-05-24) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.0.1...3.0.2) This is a patch release that: - Fixes a dart2js crash when using a switch case expression on a record where the fields don't match the cases (issue [#​52438]). - Add class modifier chips on class and mixin pages generated with `dart doc` (issue [#​3392]). - Fixes a situation causing the parser to fail resulting in an infinite loop leading to higher memory usage (issue [#​52352]). - Add clear errors when mixing inheritance in pre and post Dart 3 libraries (issue: [#​52078]). [#​52438]: https://togithub.com/dart-lang/sdk/issues/52438 [#​3392]: https://togithub.com/dart-lang/dartdoc/issues/3392 [#​52352]: https://togithub.com/dart-lang/sdk/issues/52352 [#​52078]: https://togithub.com/dart-lang/sdk/issues/52078 ### [`v3.0.1`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#301---2023-05-17) [Compare Source](https://togithub.com/dart-lang/sdk/compare/3.0.0...3.0.1) This is a patch release that: - Fixes a compiler crash involving redirecting factories and FFI (issue [#​124369]). - Fixes a dart2js crash when using a combination of local functions, generics, and records (issue [#​51899]). - Fixes incorrect error using a `void` in a switch case expression (issue [#​52191]). - Fixes a false error when using in switch case expressions when the switch refers to a private getter (issue [#​52041]). - Prevent the use of `when` and `as` as variable names in patterns (issue [#​52260]). - Fixes an inconsistency in type promotion between the analyzer and VM (issue [#​52241]). - Improve performance on functions with many parameters (issue [#​1212]). [#​124369]: https://togithub.com/flutter/flutter/issues/124369 [#​51899]: https://togithub.com/dart-lang/sdk/issues/51899 [#​52191]: https://togithub.com/dart-lang/sdk/issues/52191 [#​52041]: https://togithub.com/dart-lang/sdk/issues/52041 [#​52260]: https://togithub.com/dart-lang/sdk/issues/52260 [#​52241]: https://togithub.com/dart-lang/sdk/issues/52241 [#​1212]: https://togithub.com/dart-lang/dart_style/issues/1212 ### [`v3.0.0`](https://togithub.com/dart-lang/sdk/blob/HEAD/CHANGELOG.md#300---2023-05-10) [Compare Source](https://togithub.com/dart-lang/sdk/compare/2.19.6...3.0.0) ##### Language Dart 3.0 adds the following features. To use them, set your package's [SDK constraint][language version] lower bound to 3.0 or greater (`sdk: '^3.0.0'`). [language version]: https://dart.dev/guides/language/evolution - **[Records]**: Records are anonymous immutable data structures that let you aggregate multiple values together, similar to [tuples][] in other languages. With records, you can return multiple values from a function, create composite map keys, or use them any other place where you want to bundle a couple of objects together. For example, using a record to return two values: ```dart (double x, double y) geoLocation(String name) { if (name == 'Nairobi') { return (-1.2921, 36.8219); } else { ... } } ``` - **[Pattern matching]**: Expressions build values out of smaller pieces. Conversely, patterns are an expressive tool for decomposing values back into their constituent parts. Patterns can call getters on an object, access elements from a list, pull fields out of a record, etc. For example, we can destructure the record from the previous example like so: ```dart var (lat, long) = geoLocation('Nairobi'); print('Nairobi is at $lat, $long.'); ``` Patterns can also be used in [switch cases]. There, you can destructure values and also test them to see if they have a certain type or value: ```dart switch (object) { case [int a]: print('A list with a single integer element $a'); case ('name', _): print('A two-element record whose first field is "name".'); default: print('Some other object.'); } ``` Also, as you can see, non-empty switch cases no longer need `break;` statements. **Breaking change**: Dart 3.0 interprets [switch cases] as patterns instead of constant expressions. Most constant expressions found in switch cases are valid patterns with the same meaning (named constants, literals, etc.). You may need to tweak a few constant expressions to make them valid. This only affects libraries that have upgraded to language version 3.0. - **[Switch expressions]**: Switch expressions allow you to use patterns and multi-way branching in contexts where a statement isn't allowed: ```dart return TextButton( onPressed: _goPrevious, child: Text(switch (page) { 0 => 'Exit story', 1 => 'First page', _ when page == _lastPage => 'Start over', _ => 'Previous page', }), ); ``` - **[If-case statements and elements]**: A new if construct that matches a value against a pattern and executes the then or else branch depending on whether the pattern matches: ```dart if (json case ['user', var name]) { print('Got user message for user $name.'); } ``` There is also a corresponding [if-case element] that can be used in collection literals. - **[Sealed classes]**: When you mark a type `sealed`, the compiler ensures that switches on values of that type [exhaustively cover] every subtype. This enables you to program in an [algebraic datatype][] style with the compile-time safety you expect: ```dart sealed class Amigo {} class Lucky extends Amigo {} class Dusty extends Amigo {} class Ned extends Amigo {} String lastName(Amigo amigo) => switch (amigo) { Lucky _ => 'Day', Ned _ => 'Nederlander', }; ``` In this last example, the compiler reports an error that the switch doesn't cover the subclass `Dusty`. - **[Class modifiers]**: New modifiers `final`, `interface`, `base`, and `mixin` on `class` and `mixin` declarations let you control how the type can be used. By default, Dart is flexible in that a single class declaration can be used as an interface, a superclass, or even a mixin. This flexibility can make it harder to evolve an API over time without breaking users. We mostly keep the current flexible defaults, but these new modifiers give you finer-grained control over how the type can be used. **Breaking change:** Class declarations from libraries that have been upgraded to Dart 3.0 can no longer be used as mixins by default. If you want the class to be usable as both a class and a mixin, mark it [`mixin class`][mixin class]. If you want it to be used only as a mixin, make it a `mixin` declaration. If you haven't upgraded a class to Dart 3.0, you can still use it as a mixin. - **Breaking change** [#​50902][]: Dart reports a compile-time error if a `continue` statement targets a [label] that is not a loop (`for`, `do` and `while` statements) or a `switch` member. Fix this by changing the `continue` to target a valid labeled statement. - **Breaking change** [language/#​2357][]: Starting in language version 3.0, Dart reports a compile-time error if a colon (`:`) is used as the separator before the default value of an optional named parameter. Fix this by changing the colon (`:`) to an equal sign (`=`). [records]: https://dart.dev/language/records [tuples]: https://en.wikipedia.org/wiki/Tuple [pattern matching]: https://dart.dev/language/patterns [switch cases]: https://dart.dev/language/branches#switch [switch expressions]: https://dart.dev/language/branches#switch-expressions [if-case statements and elements]: https://dart.dev/language/branches#if-case [if-case element]: https://dart.dev/language/collections#control-flow-operators [sealed classes]: https://dart.dev/language/class-modifiers#sealed [exhaustively cover]: https://dart.dev/language/branches#exhaustiveness-checking [algebraic datatype]: https://en.wikipedia.org/wiki/Algebraic_data_type [class modifiers]: https://dart.dev/language/class-modifiers [mixin class]: https://dart.dev/language/mixins#class-mixin-or-mixin-class [#​50902]: https://togithub.com/dart-lang/sdk/issues/50902 [label]: https://dart.dev/language/branches#switch [language/#​2357]: https://togithub.com/dart-lang/language/issues/2357 ##### Libraries ##### General changes - **Breaking Change**: Non-`mixin` classes in the platform libraries can no longer be mixed in, unless they are explicitly marked as `mixin class`. The following existing classes have been made mixin classes: - `Iterable` - `IterableMixin` (now alias for `Iterable`) - `IterableBase` (now alias for `Iterable`) - `ListMixin` - `SetMixin` - `MapMixin` - `LinkedListEntry` - `StringConversionSink` ##### `dart:core` - Added `bool.parse` and `bool.tryParse` static methods. - Added `DateTime.timestamp()` constructor to get current time as UTC. - The type of `RegExpMatch.pattern` is now `RegExp`, not just `Pattern`. - **Breaking change** [#​49529][]: - Removed the deprecated `List` constructor, as it wasn't null safe. Use list literals (e.g. `[]` for an empty list or `[]` for an empty typed list) or [`List.filled`][List.filled]. - Removed the deprecated `onError` argument on [`int.parse`][int.parse], [`double.parse`][double.parse], and [`num.parse`][num.parse]. Use the [`tryParse`][tryParse] method instead. - Removed the deprecated [`proxy`][proxy] and [`Provisional`][Provisional] annotations. The original `proxy` annotation has no effect in Dart 2, and the `Provisional` type and [`provisional`][provisional] constant were only used internally during the Dart 2.0 development process. - Removed the deprecated [`Deprecated.expires`][Deprecated.expires] getter. Use [`Deprecated.message`][Deprecated.message] instead. - Removed the deprecated [`CastError`][CastError] error. Use [`TypeError`][TypeError] instead. - Removed the deprecated [`FallThroughError`][FallThroughError] error. The kind of fall-through previously throwing this error was made a compile-time error in Dart 2.0. - Removed the deprecated [`NullThrownError`][NullThrownError] error. This error is never thrown from null safe code. - Removed the deprecated [`AbstractClassInstantiationError`][AbstractClassInstantiationError] error. It was made a compile-time error to call the constructor of an abstract class in Dart 2.0. - Removed the deprecated [`CyclicInitializationError`][CyclicInitializationError]. Cyclic dependencies are no longer detected at runtime in null safe code. Such code will fail in other ways instead, possibly with a StackOverflowError. - Removed the deprecated [`NoSuchMethodError`][NoSuchMethodError] default constructor. Use the [`NoSuchMethodError.withInvocation`][NoSuchMethodError.withInvocation] named constructor instead. - Removed the deprecated [`BidirectionalIterator`][BidirectionalIterator] class. Existing bidirectional iterators can still work, they just don't have a shared supertype locking them to a specific name for moving backwards. - **Breaking change when migrating code to Dart 3.0**: Some changes to platform libraries only affect code when that code is migrated to language version 3.0. - The `Function` type can no longer be implemented, extended or mixed in. Since Dart 2.0 writing `implements Function` has been allowed for backwards compatibility, but it has not had any effect. In Dart 3.0, the `Function` type is `final` and cannot be subtyped, preventing code from mistakenly assuming it works. - The following declarations can only be implemented, not extended: - `Comparable` - `Exception` - `Iterator` - `Pattern` - `Match` - `RegExp` - `RegExpMatch` - `StackTrace` - `StringSink` None of these declarations contained any implementation to inherit, and are marked as `interface` to signify that they are only intended as interfaces. - The following declarations can no longer be implemented or extended: - `MapEntry` - `OutOfMemoryError` - `StackOverflowError` - `Expando` - `WeakReference` - `Finalizer` The `MapEntry` value class is restricted to enable later optimizations. The remaining classes are tightly coupled to the platform and not intended to be subclassed or implemented. [#​49529]: https://togithub.com/dart-lang/sdk/issues/49529 [`List.filled`]: https://api.dart.dev/stable/2.18.6/dart-core/List/List.filled.html [`int.parse`]: https://api.dart.dev/stable/2.18.4/dart-core/int/parse.html [`double.parse`]: https://api.dart.dev/stable/2.18.4/dart-core/double/parse.html [`num.parse`]: https://api.dart.dev/stable/2.18.4/dart-core/num/parse.html [`tryParse`]: https://api.dart.dev/stable/2.18.4/dart-core/num/tryParse.html [`Deprecated.expires`]: https://api.dart.dev/stable/2.18.4/dart-core/Deprecated/expires.html [`Deprecated.message`]: https://api.dart.dev/stable/2.18.4/dart-core/Deprecated/message.html [`AbstractClassInstantiationError`]: https://api.dart.dev/stable/2.17.4/dart-core/AbstractClassInstantiationError-class.html [`CastError`]: https://api.dart.dev/stable/2.17.4/dart-core/CastError-class.html [`FallThroughError`]: https://api.dart.dev/stable/2.17.4/dart-core/FallThroughError-class.html [`NoSuchMethodError`]: https://api.dart.dev/stable/2.18.4/dart-core/NoSuchMethodError/NoSuchMethodError.html [`NoSuchMethodError.withInvocation`]: https://api.dart.dev/stable/2.18.4/dart-core/NoSuchMethodError/NoSuchMethodError.withInvocation.html [`CyclicInitializationError`]: https://api.dart.dev/dev/2.19.0-430.0.dev/dart-core/CyclicInitializationError-class.html [`Provisional`]: https://api.dart.dev/stable/2.18.4/dart-core/Provisional-class.html [`provisional`]: https://api.dart.dev/stable/2.18.4/dart-core/provisional-constant.html [`proxy`]: https://api.dart.dev/stable/2.18.4/dart-core/proxy-constant.html [`CastError`]: https://api.dart.dev/stable/2.18.3/dart-core/CastError-class.html [`TypeError`]: https://api.dart.dev/stable/2.18.3/dart-core/TypeError-class.html [`FallThroughError`]: https://api.dart.dev/dev/2.19.0-374.0.dev/dart-core/FallThroughError-class.html [`NullThrownError`]: https://api.dart.dev/dev/2.19.0-430.0.dev/dart-core/NullThrownError-class.html [`AbstractClassInstantiationError`]: https://api.dart.dev/stable/2.18.3/dart-core/AbstractClassInstantiationError-class.html [`CyclicInitializationError`]: https://api.dart.dev/dev/2.19.0-430.0.dev/dart-core/CyclicInitializationError-class.html [`BidirectionalIterator`]: https://api.dart.dev/dev/2.19.0-430.0.dev/dart-core/BidirectionalIterator-class.html ##### `dart:async` - Added extension member `wait` on iterables and 2-9 tuples of futures. - **Breaking change** [#​49529][]: - Removed the deprecated [`DeferredLibrary`][DeferredLibrary] class. Use the [`deferred as`][deferred as] import syntax instead. [#​49529]: https://togithub.com/dart-lang/sdk/issues/49529 [`DeferredLibrary`]: https://api.dart.dev/stable/2.18.4/dart-async/DeferredLibrary-class.html [`deferred as`]: https://dart.dev/language/libraries#deferred-loading ##### `dart:collection` - Added extension members `nonNulls`, `firstOrNull`, `lastOrNull`, `singleOrNull`, `elementAtOrNull` and `indexed` on `Iterable`s. Also exported from `dart:core`. - Deprecated the `HasNextIterator` class ([#​50883][]). - **Breaking change when migrating code to Dart 3.0**: Some changes to platform libraries only affect code when it is migrated to language version 3.0. - The following interface can no longer be extended, only implemented: - `Queue` - The following implementation classes can no longer be implemented: - `LinkedList` - `LinkedListEntry` - The following implementation classes can no longer be implemented or extended: - `HasNextIterator` (Also deprecated.) -

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