Mark conditional extends as Unmeasurable and use a conditional-opaque wildcard for type erasure#43887
Closed
weswigham wants to merge 1 commit intomicrosoft:mainfrom
Closed
Mark conditional extends as Unmeasurable and use a conditional-opaque wildcard for type erasure#43887weswigham wants to merge 1 commit intomicrosoft:mainfrom
weswigham wants to merge 1 commit intomicrosoft:mainfrom
Conversation
… wildcard for type erasure
typescript-bot
added
the
For Milestone Bug
Member
Author
|
@typescript-bot pack this |
Collaborator
|
Heya @weswigham, I've started to run the parallelized community code test suite on this PR at fda479e. You can monitor the build here. |
Collaborator
|
Heya @weswigham, I've started to run the extended test suite on this PR at fda479e. You can monitor the build here. |
Collaborator
|
Heya @weswigham, I've started to run the perf test suite on this PR at fda479e. You can monitor the build here. Update: The results are in! |
Collaborator
|
Heya @weswigham, I've started to run the parallelized Definitely Typed test suite on this PR at fda479e. You can monitor the build here. |
Collaborator
|
Heya @weswigham, I've started to run the tarball bundle task on this PR at fda479e. You can monitor the build here. |
Collaborator
|
Hey @weswigham, I've packed this into an installable tgz. You can install it for testing by referencing it in your and then running There is also a playground for this build and an npm module you can use via |
Collaborator
|
@weswigham Here they are:Comparison Report - master..43887
System
Hosts
Scenarios
Developer Information: |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Collaborator
|
The user suite test run you requested has finished and failed. I've opened a PR with the baseline diff from master. |
| if (includes & TypeFlags.AnyOrUnknown) { | ||
| return includes & TypeFlags.Any ? includes & TypeFlags.IncludesWildcard ? wildcardType : anyType : unknownType; | ||
| // A wildcard has the _lowest_ type id, as it's first types created, and it's made in priority order | ||
| // - a normal `wildcardType` should take priority over an `opaqueWildcardType` if both somehoe end up |
| includes |= flags & TypeFlags.IncludesMask; | ||
| if (flags & TypeFlags.StructuredOrInstantiable) includes |= TypeFlags.IncludesStructuredOrInstantiable; | ||
| if (type === wildcardType) includes |= TypeFlags.IncludesWildcard; | ||
| if (type === wildcardType || type === opaqueWildcardType) includes |= TypeFlags.IncludesWildcard; |
Collaborator
There was a problem hiding this comment.
Should this also set the IncludesOpaqueWildcard like the statements abit below?
Member
Author
There was a problem hiding this comment.
It probably can. I was originally trying to avoid adding an extra includes flag, which, for unions, was possible by exploiting the sort order of the result set; however intersections are unsorted, so I had to add a flag to handle it there.
Collaborator
|
If I read the build correctly then DT has no issues? Are the diff's for fp-ts in the user tests a result of this change? There are some new errors related to overload resolution which seems to be a touch point for this change. The previous output was a GC dump so I don't have a good sense about whether this change is going to cause any troubles. From the POV of fixing #31251 I think this looks good. I don't understand the full implications of the change to overload resolution but the diff in |
Member
|
Unfortunately, we never finished reviewing this PR. It is pretty old now, so I'm going to close it to reduce the number of open PRs. |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to subscribe to this conversation on GitHub.
Already have an account?
Sign in.
5 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
This PR is essentially #41067 + #31277, with a change added on top so it also fixes #43867.
Fixes #43867 (we always now reliably issue the correct error (which is a new thing), rather than just for variance comparisons, as in
master)Fixes #23352 (we now use a wildcard marker for type erasure that is assignable to
never, which allows overload resolution to process the overloads as we'd like)Fixes #31251 (we now force a structural comparison when comparing type parameters which flow into conditional
extendsclauses (which require identical types))Fixes #44945