| commit | 9c59339882465751408cb157b2a0f1f7068488ce | [log] [tgz] |
|---|---|---|
| author | Chloe Stefantsova <cstefantsova@google.com> | Wed Nov 20 10:20:29 2024 |
| committer | Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> | Wed Nov 20 10:20:29 2024 |
| tree | b5e72313220f25118d6e4d62e4356f01f23f097a | |
| parent | 5b1e226fc658eb6cd2a17eb6c48450fde3297dd2 [diff] |
[cfe] Fix bottomType as Never in closures of type schemas In pre-NNBD Dart the greatest and lowest closures of a type schema were using `Null` as the bottom type and `dynamic` as the top type. In NNBD code, the top type should be `Object?', and the bottom type should be `Never`. Since pre-NNBD code is being deprecated, the code that allows to choose between the two pairs of extreme types should be removed, and `Object?` and `Never` should be used as the only options. For historical reasons, replacing `Object?` with `dynamic` in the algorithms for the greatest and the lowest closures leads to breakages in the existing NNBD code. However, the bottom type is assumed to be `Never` everywhere. This CL removes the ability to parametrise over the bottom type, choosing `Never` as the only option. The discrepancy between `Object?` and `dynamic` will be addressed later. Change-Id: Ia58ccaca37761c5de8e005f11e79b23d02a0e416 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/395963 Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: Chloe Stefantsova <cstefantsova@google.com>
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