Files
sdk/pkg/front_end
Martin Kustermann ddcd028cde [vm] Avoid expensive runtime function type checks in Future implementation
The `_FutureListener.callback` field is used for multiple purposes
(possibly to save memory by avoiding additional fields) so it cannot
have a specific function type.

This causes the `Function?` typed `_FutureListener.callback` field to be
casted to proper function types such as `T Function(S)`.
=> Those runtime type checks are very expensive.

To avoid introducing more fields we use an `unsafeCast<T>()` for those
casts, since the implementation guarantees they are going to suceed.

Issue https://github.com/dart-lang/sdk/issues/48225

TEST=ci

Change-Id: I6f0cc87600462c8ca5baceeb511ce8a06c61237e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/230240
Reviewed-by: Nicholas Shahan <nshahan@google.com>
Reviewed-by: Lasse Nielsen <lrn@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
2022-02-04 14:19:22 +00:00
..
2022-02-04 12:32:59 +00:00
2022-02-02 12:20:46 +00:00

Front end for Dart

This package provides a low-level API for use by compiler back ends that wish to implement the Dart language. It is intended for eventual use by dev_compiler, dart2js, and the Dart VM. In addition, it will share implementation details with the analyzer package--this will be accomplished by having the analyzer package import (and re-export) parts of this package's private implementation.

End-users should use the dart analyze command-line tool to analyze their Dart code.

Integrators that want to write tools that analyze Dart code should use the analyzer package.

Note: A previous version of this package was published on pub.dev. It has now been marked DISCONTINUED as it is not intended for direct consumption, as per the notes above.