Seems to be buggy.
running 1 test
thread 'limited_cache::test::test_get_or_insert_default_and_edit_evicts_old_items_to_meet_capacity' panicked at C:\Users\steve\scoop\persist\rustup\.cargo\git\checkouts\caches-rs-f5b438d840965066\ff4eb24\src\lru\adaptive.rs:384:66:
called `Option::unwrap()` on a `None` value
stack backtrace:
0: std::panicking::begin_panic_handler
at /rustc/58eefc33adf769a1abe12ad94b3e6811185b4ce5/library\std\src\panicking.rs:617
1: core::panicking::panic_fmt
at /rustc/58eefc33adf769a1abe12ad94b3e6811185b4ce5/library\core\src\panicking.rs:67
2: core::panicking::panic
at /rustc/58eefc33adf769a1abe12ad94b3e6811185b4ce5/library\core\src\panicking.rs:117
3: enum2$<core::option::Option<alloc::boxed::Box<caches::lru::raw::EntryNode<alloc::string::String,usize>,alloc::alloc::Global> > >::unwrap<alloc::boxed::Box<caches::lru::raw::EntryNode<alloc::string::String,usize>,alloc::alloc::Global> >
at /rustc/58eefc33adf769a1abe12ad94b3e6811185b4ce5\library\core\src\option.rs:935
4: caches::lru::adaptive::impl$4::put<alloc::string::String,usize,ahash::random_state::RandomState,ahash::random_state::RandomState,ahash::random_state::RandomState,ahash::random_state::RandomState>
at C:\Users\steve\scoop\persist\rustup\.cargo\git\checkouts\caches-rs-f5b438d840965066\ff4eb24\src\lru\adaptive.rs:384
5: rustls::limited_cache::LimitedCache<alloc::string::String,usize>::get_or_insert_default_and_edit<alloc::string::String,usize,rustls::limited_cache::test::test_get_or_insert_default_and_edit_evicts_old_items_to_meet_capacity::closure_env$4>
at .\src\limited_cache.rs:38
6: rustls::limited_cache::test::test_get_or_insert_default_and_edit_evicts_old_items_to_meet_capacity
at .\src\limited_cache.rs:180
7: rustls::limited_cache::test::test_get_or_insert_default_and_edit_evicts_old_items_to_meet_capacity::closure$0
at .\src\limited_cache.rs:165
8: core::ops::function::FnOnce::call_once<rustls::limited_cache::test::test_get_or_insert_default_and_edit_evicts_old_items_to_meet_capacity::closure_env$0,tuple$<> >
at /rustc/58eefc33adf769a1abe12ad94b3e6811185b4ce5\library\core\src\ops\function.rs:250
9: core::ops::function::FnOnce::call_once
at /rustc/58eefc33adf769a1abe12ad94b3e6811185b4ce5/library\core\src\ops\function.rs:250
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
test limited_cache::test::test_get_or_insert_default_and_edit_evicts_old_items_to_meet_capacity ... FAILED
failures:
failures:
limited_cache::test::test_get_or_insert_default_and_edit_evicts_old_items_to_meet_capacity
test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 189 filtered out; finished in 0.07s
#[test]
fn test_get_or_insert_default_and_edit_evicts_old_items_to_meet_capacity() {
let mut t = Test::new(3);
t.get_or_insert_default_and_edit("abc".into(), |v| *v += 1);
t.get_or_insert_default_and_edit("def".into(), |v| *v += 2);
// evicts "abc"
t.get_or_insert_default_and_edit("ghi".into(), |v| *v += 3);
assert_eq!(t.get("abc"), None);
// evicts "def"
t.get_or_insert_default_and_edit("jkl".into(), |v| *v += 4);
assert_eq!(t.get("def"), None);
// evicts "ghi"
t.get_or_insert_default_and_edit("abc".into(), |v| *v += 5);
assert_eq!(t.get("ghi"), None);
// evicts "jkl"
t.get_or_insert_default_and_edit("def".into(), |v| *v += 6);
assert_eq!(t.get("abc"), Some(&5));
assert_eq!(t.get("def"), Some(&6));
assert_eq!(t.get("ghi"), None);
assert_eq!(t.get("jkl"), None);
}
pub(crate) struct LimitedCache<K: Clone + Hash + Eq, V> {
map: AdaptiveCache<K, V>,
}
impl<K, V> LimitedCache<K, V>
where
K: Eq + Hash + Clone + core::fmt::Debug,
V: Default,
{
/// Create a new LimitedCache with the given rough capacity.
pub(crate) fn new(capacity_order_of_magnitude: usize) -> Self {
Self {
map: AdaptiveCache::new(capacity_order_of_magnitude - 1).unwrap(),
}
}
pub(crate) fn get_or_insert_default_and_edit(&mut self, k: K, edit: impl FnOnce(&mut V)) {
if self.map.contains(&k) {
edit(self.map.get_mut(&k).unwrap());
} else {
let mut val = V::default();
edit(&mut val);
// TODO: there seems to have a bug on caches-rs where if the key was recently removed
self.map.remove(&k);
self.map.put(k, val);
}
}
pub(crate) fn insert(&mut self, k: K, v: V) {
self.map.put(k, v);
}
pub(crate) fn get<'a, Q: ?Sized>(&'a mut self, k: &'a Q) -> Option<&V>
where
K: Borrow<Q>,
KeyRef<K>: Borrow<Q>,
Q: Hash + Eq,
{
self.map.get(k)
}
pub(crate) fn get_mut<'a, Q: ?Sized>(&'a mut self, k: &'a Q) -> Option<&mut V>
where
K: Borrow<Q>,
KeyRef<K>: Borrow<Q>,
Q: Hash + Eq,
{
self.map.get_mut(k)
}
pub(crate) fn remove<'a, Q: ?Sized>(&'a mut self, k: &'a Q) -> Option<V>
where
K: Borrow<Q>,
KeyRef<K>: Borrow<Q>,
Q: Hash + Eq,
{
self.map.remove(k)
}
}
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