Dart 1.9.1 Release Notes

Language changes

• Support for async, await, sync *, async* yield, yield*, await for – learn more here

• enum is fully enabled – read about it on the language tour under Enumerated Types

Tool changes

• Improved formatter

• Much more comprehensive

• Generates much more readable code

• Read about the formatter on our site

• Analysis Server integration into IntelliJ plugin and Dart Editor

• Improved code analysis

• Runs out of process in IDEs, so interaction remains smooth, even for large projects

• More and better hints, including unused variables and unused private members

Core library changes

Highlights

• New model for shared server sockets – no need for Socket reference, implemented on all platforms

• New, much faster regexp engine

• Isolate APIs now works across VM and dart2js

Details

For more information on any of these changes, see the corresponding documentation on the Dart API site.

• dart:async

• Future.wait added a new named argument: cleanUp

• new class: SynchronousStreamController

• dart:collection

• SplayTreeSet added a new constructor: from(Iterable)

• dart:convert

• Utf8Encoder.convert and Utf8Decoder.convert added optional start and end arguments

• dart:core

• RangeError added new static helper functions: checkNotNegative, checkValidIndex, checkValidRange, checkValueInInterval

• int added modPow function

• String added replaceFirstMapped and replaceRange

• dart:io

• New classes: FileLock and ProcessStartMode

• File added lock, lockSync, unlock, and unlockSync.

• HttpServer static methods bind and bindSecure added named arguments v6Only and shared.

• Process.start added mode (ProcessStartMode) argument.

• Process added static method killPid.

• ServerSocket.bind, RawServerSocket.bind, SecureServerSocket.bind and RawSecureServerSocket.bind methods added new argument shared.

• SocketReference methods and classes have been marked as deprecated.

• Socket and RawSocket static method connect added sourceAddress argument.

• Stdout added nonBlocking instance property

• dart:isolate

• Isolate added static getter current

• Isolate APIs now works on the VM, including addOnExitListener, removeOnExitListener, setErrorsFatal, addOnErrorListener, removeOnErrorListener

• spawnFunction now allows passing top-level and static functions as in the message argument.