Skip to content

/ immutables

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Make empty mapping a singleton #20

Open
hukkinj1 opened this issue Mar 11, 2020 · 0 comments
Open

Make empty mapping a singleton #20

hukkinj1 opened this issue Mar 11, 2020 · 0 comments

Comments

@hukkinj1
Copy link
Contributor

@hukkinj1 hukkinj1 commented Mar 11, 2020

We might want to consider making the same optimization for empty mappings that CPython does for the builtin immutable types tuple and frozenset: make the empty mapping a singleton.

For reference, consider:

tuple() is tuple()
# True

frozenset() is frozenset()
# True

import immutables
immutables.Map() is immutables.Map()
# False
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Assignees
No one assigned
Labels
None yet
Projects
None yet
Milestone
No milestone
Linked pull requests

Successfully merging a pull request may close this issue.

None yet
1 participant
@hukkinj1
You can’t perform that action at this time.