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This commit is contained in:
Chris Fallin 2022-11-10 00:50:09 -08:00
parent e53d801107
commit 26244fbfbd
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1 changed files with 2 additions and 0 deletions
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src/entity.rs
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@ -148,12 +148,14 @@ pub struct PerEntity<Idx: EntityRef, T: Clone + Debug + Default>(Vec<T>, Phantom
impl<Idx: EntityRef, T: Clone + Debug + Default> Index<Idx> for PerEntity<Idx, T> {
type Output = T;
fn index(&self, idx: Idx) -> &T {
debug_assert!(idx.is_valid());
self.0.get(idx.index()).unwrap_or(&self.2)
}
}
impl<Idx: EntityRef, T: Clone + Debug + Default> IndexMut<Idx> for PerEntity<Idx, T> {
fn index_mut(&mut self, idx: Idx) -> &mut T {
debug_assert!(idx.is_valid());
if idx.index() >= self.0.len() {
self.0.resize(idx.index() + 1, T::default());
}