[mypyc] (Re-)Support iterating over an Union of dicts #14713
Merged
Conversation
This file contains 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
An optimization to make iterating over dict.keys(), dict.values() and dict.items() faster caused mypyc to crash while compiling a Union of dictionaries. This commit fixes the optimization helpers to properly handle unions. irbuild.Builder.get_dict_base_type() now returns list[Instance] with the union items. In the common case we don't have a union, a single-element list is returned. And get_dict_key_type() and get_dict_value_type() will now build a simplified RUnion as needed.
hauntsaninja
approved these changes
Feb 16, 2023
JukkaL
approved these changes
Feb 16, 2023
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
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Outdated suggestions cannot be applied.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.
An optimization to make iterating over dict.keys(), dict.values() and dict.items() faster caused mypyc to crash while compiling a Union of dictionaries. This commit fixes the optimization helpers to properly handle unions.
irbuild.Builder.get_dict_base_type() now returns list[Instance] with the union items. In the common case we don't have a union, a single-element list is returned. And get_dict_key_type() and get_dict_value_type() will now build a simplified RUnion as needed.
Fixes mypyc/mypyc#965 and probably #14694.