| Quellcodebibliothek Statistik Leitseite products/Sources/formale Sprachen/C/Postgres/doc/src/sgml/ (Postgres Database Version 18.4©) Datei vom 11.4.2026 mit Größe 7 kB |
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Quelle behavior.rsSprache: Rust |
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//! Behavior semantics for `ArrayDeque`. //! //! `ArrayDeque` provides two different behaviors, `Saturating` and `Wrapping`, //! determining whether to remove existing element automatically when pushing //! to a full deque. //! //! The behavior is indicated by a marker type parameter of `ArrayDeque`, //! which defaults to `Saturating`. //! //! ## Saturating //! //! Pushing any element when `ArrayDeque` is full will directly return an `Err(CapacityError //! containing the element attempting to push, leaving the `ArrayDeque` unchanged. //! //! ``` //! use arraydeque::{ArrayDeque, Saturating, CapacityError}; //! //! let mut tester: ArrayDeque<_, 2, Saturating> = ArrayDeque::new(); //! //! assert_eq!(tester.push_back(1), Ok(())); //! assert_eq!(tester.push_back(2), Ok(())); //! assert_eq!(tester.push_back(3), Err(CapacityError { element: 3 })); //! ``` //! //! ## Wrapping //! //! Pushing any element when `ArrayDeque` is full will pop an element at //! the other side to spare room. //! //! ``` //! use arraydeque::{ArrayDeque, Wrapping}; //! //! let mut tester: ArrayDeque<_, 2, Wrapping> = ArrayDeque::new(); //! //! assert_eq!(tester.push_back(1), None); //! assert_eq!(tester.push_back(2), None); //! assert_eq!(tester.push_back(3), Some(1)); //! ``` /// Marker trait for indicating behaviors of `ArrayDeque`. pub trait Behavior {} /// Behavior for `ArrayDeque` that specifies saturating write semantics. pub struct Saturating; impl Behavior for Saturating {} /// Behavior for `ArrayDeque` that specifies wrapping write semantics. pub struct Wrapping; impl Behavior for Wrapping {}
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2026-08-25