Specify null safety #2605
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Specify null safety #2605
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Visit the preview URL for this PR (updated for commit 37acce6): https://dart-specification--pr2605-specify-null-safety-50hej3os.web.app (expires Mon, 18 Sep 2023 13:58:21 GMT) 🔥 via Firebase Hosting GitHub Action 🌎 Sign: 6941ecd630c4f067ff3d02708a45ae0f0a42b88a |
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Woohoo! Part of this PR has now been landed: #2052. |
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Jul 21, 2023
…tions' (#2052) Integrate the null-safety aware sections about variables and local variable declarations in the the language specification. Also updates the terminology to talk about 'static X' meaning a member declaration that includes the keyword `static` (or a member whose declaration includes `static`). This means that we avoid having the extremely confusing phrase 'static variable' (meaning a top-level variable or a variable whose declaration includes `static`). The new meaning of 'static variable' is simply a variable whose declaration includes `static`. Eliminated the single occurrence of 'static function' (now using 'static member', which is well defined). Similarly, updates the terminology to avoid the words 'mutable' and 'immutable' (about variables). The reason for this is that the concept of being immutable is confusing now that we have `late final v;`: That declaration induces a setter, but it is semantically immutable (because it may be initialized, but it will never update the initial value to a different value).
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…-time errors have been for a while
…new/const C<T>()` is still an error when `C<T>` is super-bounded
…nal and named parameters, not just parameters that are both
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This is the full PR that integrates the null-safety feature into the language specification. It is not intended to be landed as such: Parts of it are currently being reviewed, and further parts will be reviewed later on, such that all of this gets landed, but avoiding a review which is too large to get done in one fell swoop.
Parts under review (as of Nov 2 2022): #2052, #2023.
This PR has been uploaded at this point in order to make it more convenient to refer to specific locations in the proposed new text. When each of the parts lands it is expected that this PR is rebased, and piece by piece of it will disappear because some of the changes in this PR have already been made by those partial PRs.