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move BoundedVecDeque to aptos-collections
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| [package] | ||
| name = "aptos-collections" | ||
| description = "Aptos Collections Library" | ||
| version = "0.1.0" | ||
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| # Workspace inherited keys | ||
| authors = { workspace = true } | ||
| edition = { workspace = true } | ||
| homepage = { workspace = true } | ||
| license = { workspace = true } | ||
| publish = { workspace = true } | ||
| repository = { workspace = true } | ||
| rust-version = { workspace = true } | ||
|
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| [dependencies] |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| use std::collections::{vec_deque, VecDeque}; | ||
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| pub struct BoundedVecDeque<T> { | ||
| inner: VecDeque<T>, | ||
| capacity: usize, | ||
| } | ||
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| impl<T> BoundedVecDeque<T> { | ||
| pub fn new(capacity: usize) -> Self { | ||
| assert!(capacity > 0); | ||
| Self { | ||
| inner: VecDeque::with_capacity(capacity), | ||
| capacity, | ||
| } | ||
| } | ||
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| pub fn is_full(&self) -> bool { | ||
| self.inner.len() == self.capacity | ||
| } | ||
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| pub fn push_back(&mut self, item: T) -> Option<T> { | ||
| let oldest = if self.is_full() { | ||
| self.inner.pop_front() | ||
| } else { | ||
| None | ||
| }; | ||
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| self.inner.push_back(item); | ||
| assert!(self.inner.len() <= self.capacity); | ||
| oldest | ||
| } | ||
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| pub fn iter(&self) -> vec_deque::Iter<'_, T> { | ||
| self.inner.iter() | ||
| } | ||
| } | ||
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| #[cfg(test)] | ||
| mod tests { | ||
| use super::BoundedVecDeque; | ||
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| #[test] | ||
| fn test_bounded_vec_deque_capacity() { | ||
| let capacity = 10; | ||
| let mut queue = BoundedVecDeque::new(capacity); | ||
| for i in 0..capacity { | ||
| queue.push_back(i); | ||
| } | ||
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| assert!(queue.is_full()); | ||
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| assert_eq!(queue.push_back(capacity), Some(0)); | ||
| } | ||
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| #[test] | ||
| fn test_bounded_vec_deque_iter() { | ||
| let capacity = 10; | ||
| let mut queue = BoundedVecDeque::new(capacity); | ||
| for i in 0..capacity { | ||
| queue.push_back(i); | ||
| } | ||
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| for (i, item) in queue.iter().enumerate() { | ||
| assert_eq!(i, *item); | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| mod bounded_vec_deque; | ||
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| pub use bounded_vec_deque::BoundedVecDeque; |