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CHANGELOG.md

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Changelog

1.4.0

  • upgrade parking_lot to 0.10 (note that this bumps MSRV with parking_lot feature enabled to 1.36.0).
  • add OnceCell::take.
  • upgrade crossbeam utils (private dependency) to 0.7.

1.3.1

  • remove unnecessary F: fmt::Debug bound from impl fmt::Debug for Lazy<T, F>.

1.3.0

  • Lazy<T> now implements DerefMut.
  • update implementation according to the latest changes in std.

1.2.0

  • add sync::OnceCell::get_unchecked.

1.1.0

  • implement Default for Lazy: it creates an empty Lazy<T> which is initialized with T::default on first access.
  • add OnceCell::get_mut.

1.0.2

  • actually add #![no_std] attribute if std feature is not enabled.

1.0.1

  • fix unsoundness in Lazy<T> if the initializing function panics. Thanks @xfix!
  • implement RefUnwindSafe for Lazy.
  • share more code between std and parking_lot implementations.
  • add F.A.Q section to the docs.

1.0.0

  • remove parking_lot from the list of default features.
  • add std default feature. Without std, only unsync module is supported.
  • implement Eq for OnceCell.
  • fix wrong Sync bound on sync::Lazy.
  • run the whole test suite with miri.

0.2.7

  • New implementation of sync::OnceCell if parking_lot feature is disabled. It now employs a hand-rolled variant of std::sync::Once.
  • sync::OnceCell::get_or_try_init works without parking_lot as well!
  • document the effects of parking_lot feature: same performance but smaller types.

0.2.6

  • Updated Lazy's Deref impl to requires only FnOnce instead of Fn

0.2.5

  • Lazy requires only FnOnce instead of Fn

0.2.4

  • nicer fmt::Debug implementation

0.2.3

  • update parking_lot to 0.9.0
  • fix stacked borrows violation in unsync::OnceCell::get
  • implement Clone for sync::OnceCell<T> where T: Clone

0.2.2

  • add OnceCell::into_inner which consumes a cell and returns an option

0.2.1

  • implement sync::OnceCell::get_or_try_init if parking_lot feature is enabled
  • switch internal unsafe implementation of sync::OnceCell from Once to Mutex
  • sync::OnceCell::get_or_init is twice as fast if cell is already initialized
  • implement std::panic::RefUnwindSafe and std::panic::UnwindSafe for OnceCell
  • better document behavior around panics

0.2.0

  • MSRV is now 1.31.1
  • Lazy::new and OnceCell::new are now const-fns
  • unsync_lazy and sync_lazy macros are removed

0.1.8

  • update crossbeam-utils to 0.6
  • enable bors-ng

0.1.7

  • cells implement PartialEq and From
  • MSRV is down to 1.24.1
  • update parking_lot to 0.7.1

0.1.6

  • unsync::OnceCell<T> is Clone if T is Clone.

0.1.5

  • No changelog until this point :(