41 lines
1 KiB
Rust
41 lines
1 KiB
Rust
use std::cmp::Ordering;
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/// Helper struct to associate an item with its priority
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#[derive(Debug, Clone, Copy)]
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pub struct Item<D, P: Ord> {
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data: D,
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priority: P,
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}
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impl<D, P: Ord> Item<D, P> {
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/// Creates a new instance
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fn new(data: D, priority: P) -> Self {
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Self { data, priority }
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}
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/// Retrieve the internal data, it would be nicer to implement this using [`From`] or [`Into`], but I don't see a way to do that using generics
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fn data(self) -> D {
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self.data
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}
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}
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// The relevant Ord implementations are based just on the priority
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impl<D, P: Ord> Ord for Item<D, P> {
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fn cmp(&self, other: &Self) -> Ordering {
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self.priority.cmp(&other.priority)
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}
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}
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impl<D, P: Ord> PartialOrd for Item<D, P> {
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fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
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Some(self.cmp(other))
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}
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}
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impl<D, P: Ord> PartialEq for Item<D, P> {
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fn eq(&self, other: &Self) -> bool {
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self.priority == other.priority
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}
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}
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impl<D, P: Ord> Eq for Item<D, P> {}
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