| commit | c72a10f5c5697f2b9a88306a3cbbb99cb7b1cc39 | [log] [tgz] |
|---|---|---|
| author | Paul Berry <paulberry@google.com> | Thu Feb 09 14:47:48 2023 +0000 |
| committer | Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> | Thu Feb 09 14:47:48 2023 +0000 |
| tree | a5bfab2edc4fe33bfa837903583aaf04d93070d3 | |
| parent | d55ffbc419aac2149950e3058d23e9497f147c73 [diff] |
Flow analysis: fix reachability for cast patterns. If a cast pattern fails to match, it throws an exception, so the "match failure" code path should be unreachable. To fix this, I added an optional argument `updateUnmatched` to `patternRequiredType` to allow the type analyzer to tell flow analysis whether a required type is enforced via a match failure or an exception. I also renamed `patternRequiredType` to `promoteForPattern`; this is in anticipation of an upcoming CL which will use this method to promote to a type which isn't necessarily the same as the required type. I also discovered a few testing gaps while double-checking that every call to `promoteForPattern` makes the proper choice about what to pass for `updateMatched`; I've added test cases to cover these gaps. Bug: https://github.com/dart-lang/sdk/issues/50419 Change-Id: Id6f63138d01b481e7c9442469ce45e2aaa507a5a Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/281740 Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: Paul Berry <paulberry@google.com>
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