generational-arena

Released 2023-05-22.

Released 2020-05-18.

• Add a Default implementation for Arena
• Add the insert_with and try_insert_with methods to Arena. These methods allow creating a value while inserting it, and the function to create the value is given the its id in the arena. For example, this allows a struct that is in an arena to have a member field that is its id within the arena.

Released 2020-01-03.

• Fixed a bug in Arena::retain where not every element was always considered for retention. See https://github.com/fitzgen/generational-arena/pull/28 for details.

Released 2019-11-11.

• Added Arena::get_unknown_gen[_mut] methods for the rare cases where you need to get the item and Index at a given offset within the arena.

Yanked because of bad cargo publish.

Released 2019-11-04.

• The retain method now gives mutable references to the arena's items, rather than shared references. This matches Vec::retain.
• Upgraded to 2018 edition.

Released 2019-09-25.

• Add methods for converting Index into and from its raw parts.

Released 2019-03-12.

• Add a retain method analogous to Vec::retain.

Released 2019-01-22.

• Bad indexing into an arena will now panic with a message explaining what happened instead of the generic unwrap panic message.

Released 2018-11-28.

• Added support for serde serialization and deserialization. Enable the "serde" feature to access it.
• Added clear method to empty an arena.
• Added a drain method to iterate over items and remove them from the arena at the same time.
• Implemented ExactSizeIterator, DoubleEndedIterator, and FusedIterator for our various iterators. This also gave a nice speed up to iteration.
• Added the get2_mut method to get two distinct items out of the arena mutably at the same time.