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use crate::component::Component;
use crate::entity_id::EntityId;
use crate::sparse_set::SparseSet;
use crate::view::ViewMut;
pub trait Delete {
fn delete(&mut self, entity: EntityId) -> bool;
}
impl Delete for () {
#[inline]
fn delete(&mut self, _: EntityId) -> bool {
false
}
}
impl<T: Component> Delete for ViewMut<'_, T> {
#[inline]
fn delete(&mut self, entity: EntityId) -> bool {
let current = self.current;
SparseSet::delete(&mut *self, entity, current)
}
}
impl<T: Component> Delete for &mut ViewMut<'_, T> {
#[inline]
fn delete(&mut self, entity: EntityId) -> bool {
let current = self.current;
SparseSet::delete(*self, entity, current)
}
}
macro_rules! impl_delete_component {
($(($storage: ident, $index: tt))+) => {
impl<$($storage: Delete),+> Delete for ($($storage,)+) {
#[inline]
fn delete(&mut self, entity: EntityId) -> bool {
$(
self.$index.delete(entity)
)||+
}
}
}
}
macro_rules! delete_component {
($(($storage: ident, $index: tt))+; ($storage1: ident, $index1: tt) $(($queue_type: ident, $queue_index: tt))*) => {
impl_delete_component![$(($storage, $index))*];
delete_component![$(($storage, $index))* ($storage1, $index1); $(($queue_type, $queue_index))*];
};
($(($storage: ident, $index: tt))+;) => {
impl_delete_component![$(($storage, $index))*];
}
}
delete_component![(ViewA, 0); (ViewB, 1) (ViewC, 2) (ViewD, 3) (ViewE, 4) (ViewF, 5) (ViewG, 6) (ViewH, 7) (ViewI, 8) (ViewJ, 9)];