Remove Type's hash_value function #32399
Merged
Conversation
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
Defining `hash_value` for `Type` makes it easy to forget that the underlying pointer is being hashed directly without canonicalization. Instead, define it only for `CanType`, and make `Type` users spell `getPointer` explicitly.
It was incorrectly hashing the type as a pointer but canonicalizing for equality. Change equality to compare pointers.
Contributor
Author
|
@swift-ci please test |
CodaFi
approved these changes
Jun 16, 2020
Contributor
|
⛵ |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 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Outdated suggestions cannot be applied.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.
Defining
hash_valueforTypemakes it easy to forget that the underlying pointer is being hashed directly without canonicalization. Instead, define it only forCanType, and makeTypeusers spellgetPointerexplicitly.In addition, fix
TypeWitnessAndDecl's equality to match its hashing implementation.