iddqd 0.3.17

Added

• Capacity management methods for all map types:
  • reserve(&mut self, additional: usize) reserves capacity for at least additional more elements.
  • shrink_to_fit(&mut self) shrinks capacity to fit the current length.
  • shrink_to(&mut self, min_capacity: usize) shrinks capacity to at least min_capacity.
  • try_reserve(&mut self, additional: usize) -> Result<(), TryReserveError>: fallible capacity reservation for hash maps (IdHashMap, BiHashMap, TriHashMap).
• New TryReserveError type in the errors module for reporting allocation failures.

Notes

• For IdOrdMap, the reserve and shrink methods only affect item storage. The internal BTreeSet used for item ordering does not support capacity control.
• IdOrdMap does not provide try_reserve, since the underlying BTreeSet does not expose fallible reservation operations.

Fixed

• Fixed an instance of potential unsoundness in retain.

Changed

The Extend implementations now pre-reserve capacity based on the iterator's size_hint.