Ömer Sinan Ağacan
b180aa3c55
Currently when `switch` expression is nullable (so the values are boxed)
we currently use `ref.eq` to compare the values.
This doesn't work as expected when one of the values is a constant and
the other one is a runtime-allocated value. Example:
void test(bool? x) {
switch (x) {
case false:
print('no');
case true:
print('yes');
case null:
print('maybe');
}
}
bool runtimeTrue = int.parse('1') == 1;
void main() {
test(runtimeTrue);
}
Here the return value of `runtimeTrue` is boxed in the call site of
`test`. In the body of `test` we use globals for constants `true` and
`false`, which are never equal to runtime-allocated values.
We now use `identical` in these cases, which handles `bool`, `String`,
and `num` values as expected and compares the rest using `ref.eq`.
New passing test: co19/LanguageFeatures/Patterns/exhaustiveness_A01_t10
Fixes #52075
Change-Id: Ibbeda7525fd40cfec5ee477493d0d96ac6e139b2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/295941
Commit-Queue: Ömer Ağacan <omersa@google.com>
Reviewed-by: Aske Simon Christensen <askesc@google.com>
Package validation
The packages in pkg/ are automatically validated on the LUCI CI bots. The
validation is largely done by the tools/package_deps package; it can be tested
locally via:
dart tools/package_deps/bin/package_deps.dart
Packages which are published
There are several packages developed in pkg/ which are published to pub.
Validation of these packages is particularly important because the pub tools are
not used for these packages during development; we get our dependency versions
from the DEPS file. Its very easy for the dependencies specified in a package's
pubspec file to get out of date wrt the packages and versions actually used.
In order to better ensure we're publishing correct packages, we validate some properties of the pubspec files on our CI system. These validations include:
- that the dependencies listed in the pubspec are used in the package
- that all the packages used by the source are listed in the pubspec
- that we don't use relative path deps to pkg/ or third_party/ packages
Packages which are not published
For packages in pkg/ which we do not intend to be published, we put the following comment in the pubspec.yaml file:
# This package is not intended for consumption on pub.dev. DO NOT publish.
publish_to: none
These pubspecs are still validated by the package validation tool. The contents are more informational as the pubspecs for these packages are not consumed by the pub tool or ecosystem.
We validate:
- that the dependencies listed in the pubspec are used in the package
- that all the packages used by the source are listed in the pubspec
- that a reference to a pkg/ package is done via a relative path dependency