Avoid quadratic behavior when multiple chunks fail to
have a line break, and the carry-over string gets repeatedly extended.
In the original chunked conversion code, the chunk handling code retained the trailing, non-line-terminated text of the previous chunk, then eagerly concatenated it with the next chunk in order to continue looking for lines. That's moderately effective when lines are shorter than chunks, and neither are too large.
However, a very long line spread across many chunks would perform repeated string concatenation with quadratic time complexity.
This change gives `LineSplitter` the option of using a `StringBuffer` to collect multiple carry-over line parts.
The buffer is needed whenever a chunk does not contain a line break, and needs to be combined with a previous chunk's carry-over. This avoids ever directly concatenating any more than two strings.
The `StringBuffer` is not allocated until it's first needed, so if lines are generally shorter than chunks, the buffer won't be used. Once allocated, the buffer is retained in case a buffer will be needed again, but cleared when its contents are used.
The code optimizes for the simple case of each chunk having a line break.
Fixes#51167
Bug: https://github.com/dart-lang/sdk/issues/51167
Change-Id: I600a011e02aa9f1ad6f88e45764df5b2e8eccfa3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/280100
Reviewed-by: Leaf Petersen <leafp@google.com>
Reviewed-by: Stephen Adams <sra@google.com>
Commit-Queue: Lasse Nielsen <lrn@google.com>
Reviewed-by: Siva Annamalai <asiva@google.com>
Reviewed-by: Aske Simon Christensen <askesc@google.com>
Reviewed-by: Nate Bosch <nbosch@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Before we can reify `JSUndefined` and `JSNull` we need to give users a way to detect these values. Once existing users have migrated to these new helpers, then we can start boxing `JSUndefined` and `JSNull` on Dart2Wasm.
There are a few steps here:
1) Land these helpers, but for now they will just preserve the existing semantics.
2) Deploy JS types to Flutter and `package:test`, i.e. everywhere Dart2Wasm's JS interop is currently being used, and use these helpers instead of `null` checks.
3) Switch the semantics of the helpers to stop conflating on all Web backends, while simultaneously boxing `JSNull` and `JSUndefined` on Dart2Wasm.
CoreLibraryReviewExempt: Refactoring web only libraries + some changes to Wasm's internal libraries.
Change-Id: Idb50b28b3087438751557ffd28505c7b536bf78b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/282481
Reviewed-by: Srujan Gaddam <srujzs@google.com>
Commit-Queue: Joshua Litt <joshualitt@google.com>
External inline instance members can be lowered the same way as
external extension instance members on interop classes. Similarly,
code is refactored so that external extension members can exist
on inline interop classes and are lowered accordingly.
Change-Id: I341bfeef3f1b74b54a63c963553af9230c4a10c9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/280621
Reviewed-by: Joshua Litt <joshualitt@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Commit-Queue: Srujan Gaddam <srujzs@google.com>
Types still need to be sealed, so this library is exposed with a
disclaimer that users should not subtype any types.
CoreLibraryReviewExempt: Backend-specific library for JS and Wasm.
Change-Id: I2ed8b0db6b2de60932a551047c6c9eae4a34ce2f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/281343
Reviewed-by: Joshua Litt <joshualitt@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Reviewed-by: Siva Annamalai <asiva@google.com>
Commit-Queue: Srujan Gaddam <srujzs@google.com>
* The new compiler name "ddc" will be used for all configurations
in an upcoming change.
* Aliases "dartdevc" and "dartdevk" will be removed in the future.
Change-Id: I2fa48e0ec043b1ba7fb70f883b39e40f338b6928
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/280862
Commit-Queue: Nicholas Shahan <nshahan@google.com>
Reviewed-by: Alexander Thomas <athom@google.com>
Amends lowerings on dart2wasm and JS backends to work for external
constructors/factories and static members. Tests members with and
without renaming of members/classes/libraries. Note that this does
not add support for object literal factories yet.
Change-Id: I149bef7249c1a13a31eed9f3510256d407b1d3e3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/280056
Reviewed-by: Joshua Litt <joshualitt@google.com>
Commit-Queue: Srujan Gaddam <srujzs@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Moves JSObject to dart:_js_helper, so that JavaScript objects
can be used with that type in the JS backends. The type then
gets reexported in dart:_js_interop with a typedef.
This is purely for experimentation. This class needs to be sealed
before we can publish this library.
Change-Id: I16093165deaa5bc5d7940eb0cb98da32c36e485a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/278894
Commit-Queue: Srujan Gaddam <srujzs@google.com>
Reviewed-by: Joshua Litt <joshualitt@google.com>
This makes it easier to run tests locally, just specifying the suites
`co19 corelib language lib web` to `test.py`.
It also make it easier to change which tests we run going forward.
Change-Id: I3a4765c18ee105055fdb9a6b59036da11b956e1a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/279973
Commit-Queue: Aske Simon Christensen <askesc@google.com>
Reviewed-by: Alexander Thomas <athom@google.com>
Reviewed-by: Jackson Gardner <jacksongardner@google.com>
dart2wasm does not allow top-level externals to not be annotated
with @JS, even if the library is. trustTypes also is not supported
on dart2wasm.
Change-Id: I8c1d146dcf5d9f97559e854be690bb98726513b1
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/279757
Commit-Queue: Srujan Gaddam <srujzs@google.com>
Reviewed-by: Joshua Litt <joshualitt@google.com>
Adds dart:_js_interop for use in the web backends. This library
only exports dart:_js_annotations' @JS for now. In the future,
we'll add more to this library and mark it public. Also refactors
some tests to use dart:_js_interop.
Change-Id: I7b60c950a39038a586756b7c9c10c6e31f1ab4cb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/278694
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Reviewed-by: Joshua Litt <joshualitt@google.com>
Commit-Queue: Srujan Gaddam <srujzs@google.com>
Generative synthetic constructors of @staticInterop classes are already
disallowed, but this adds errors for tear-offs of such members as well.
This also disallows tear-offs of @anonymous @staticInterop factory
tear-offs. This aligns with what we want to do with object literal
constructors going forward, as tear-offs will implicitly have different
semantics than direct invocations. To avoid that inconsistency, we
disallow tear-offs here.
Change-Id: Ifc9e4a9251743613ee1ea2eca6e42e36c3b20461
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/278645
Reviewed-by: Riley Porter <rileyporter@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Since we lower @staticInterop members differently, CFE expectations are
updated. A previous patchset updated tests to account for changes in
top-level external members, but those changes are now non-breaking.
This CL still keeps some of those fixes to tests since they are more
sound and correct:
- Debugger tests to allowInterop a function that wasn't caught before,
as DDC only adds checks for arguments whose static type is a Function,
whereas js_util does a runtime is check to determine if the argument is
a Function
- Interop tests that typed top-level externals unsoundly
- Interop tests that used tear-offs of top-level external methods
instead of getters
Change-Id: I46a5a1316db1dba38691efece075f9c34ac4b4e0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/277660
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Lowers external factories on non-anonymous classes to a callConstructor
invocation and lowers external anonymous factory invocations to a jsify
call taking in only the arguments that were passed. In a future CL,
tear-offs of external anonymous factories will be disallowed.
Change-Id: I288230f24435fac8a15079f54bddce1c2c1a6521
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/277049
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Lowers top-level external package:js members to their respective
js_util transformation, taking into account any namespacing in the
member's name. We only do this transformation for code that uses the
@JS annotation from dart:_js_annotations and isn't from dart:ui. This
is to avoid a breaking change for Dart 3. As such, we allow
dart:_js_annotations to be used in some test paths. In the future, we
will export the dart:_js_annotations @JS annotation through
dart:js_interop instead.
Change-Id: I3b92a3a8cd1340c50913b9df6fdc743e2790259e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/277048
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Lowers external static class members (fields, getters, setters, methods)
on a @staticInterop class to their respective js_util transformations.
Tests are added for a non-namespaced and a namespaced library.
Change-Id: Ife0b53c05310e924ebfbcf2059f6048ae8447c2f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/277047
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Setting the `stream` parameter on `developer.postEvent` will now forward those events to a custom stream inside DDS.
The first use of this will be for widget inspection. A navigation event will be posted to a custom stream. Our IDE DAP can listen for the Event and react to it by navigating to the desired location in the code.
TEST=Updated observatory tests. Created new developer test to check assertions. Added DDS tests for new custom stream behaviour. Manually tested the postEvent and StreamListen with multiple clients
https://github.com/flutter/devtools/issues/4533
Change-Id: I870dc634c9a9a7d2ee3a6605319c2a18517ad197
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/274061
Reviewed-by: Ben Konyi <bkonyi@google.com>
Commit-Queue: Dan Chevalier <danchevalier@google.com>
The timeouts are crashing the test infra when trying to deflake
the failures and preventing more results from getting uploaded.
These tests are timing out right now on the canary bot because
support for the new runtime types hasn't been fully landed. They
should be enabled again after all the support has landed and
should have results at parity with the non-canary configurations.
Change-Id: Ia8814c02445acccb906c4b376c82da88480155b9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/274483
Reviewed-by: Mark Zhou <markzipan@google.com>
Commit-Queue: Nicholas Shahan <nshahan@google.com>
- Flip flag to make strong null safety the default
- Remove code that auto detects null safety mode from source files,
it is necessary to specify --no-strong-null-safety to opt out.
- Retains sniffing of AOT/JIT snapshots and kernel files to determine
null safety mode, the opt out has to be done when generating these
file.
TEST=ci
Change-Id: If2c9608eedb7c46d9c3cd85e261ee9640e0d28eb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/261140
Reviewed-by: Alexander Thomas <athom@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Commit-Queue: Siva Annamalai <asiva@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Adds checks that if the derived class does not have a `@staticInterop`
annotation, none of the classes it implements or immediately extends can
have it either. Also cleans up some redundant abstract class tests for
readability.
Change-Id: I2e8528b0fb02d9ce39003d00ee0b3da88ce75d44
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/268109
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Reviewed-by: Riley Porter <rileyporter@google.com>
Commit-Queue: Srujan Gaddam <srujzs@google.com>
Lasse R.H. Nielsen