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[Merged by Bors] - Add entity ID to expect() message #2943

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[Merged by Bors] - Add entity ID to expect() message #2943

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796628b
Add entity ID to expect() message
djeedai Oct 9, 2021
40b202e
Remove allocation on non-failure case
djeedai Oct 9, 2021
e5827a6
Fix typo
djeedai Oct 9, 2021
be5e08a
Use {:?} instead of custom format
djeedai Oct 10, 2021
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8 changes: 6 additions & 2 deletions crates/bevy_ecs/src/world/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -186,7 +186,9 @@ impl World {
/// ```
#[inline]
pub fn entity(&self, entity: Entity) -> EntityRef {
self.get_entity(entity).expect("Entity does not exist")
// Lazily evaluate panic!() via unwrap_or_else() to avoid allocation unless failure
self.get_entity(entity)
.unwrap_or_else(|| panic!("Entity {:?} does not exist", entity))
}

/// Retrieves an [EntityMut] that exposes read and write operations for the given `entity`.
Expand All @@ -211,7 +213,9 @@ impl World {
/// ```
#[inline]
pub fn entity_mut(&mut self, entity: Entity) -> EntityMut {
self.get_entity_mut(entity).expect("Entity does not exist")
// Lazily evaluate panic!() via unwrap_or_else() to avoid allocation unless failure
self.get_entity_mut(entity)
.unwrap_or_else(|| panic!("Entity {:?} does not exist", entity))
}

/// Retrieves an [EntityRef] that exposes read-only operations for the given `entity`.
Expand Down