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https://github.com/bevyengine/bevy
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remove ReflectMut
in favor of Mut<dyn Reflect>
(#5630)
# Objective - `ReflectMut` served no purpose that wasn't met by `Mut<dyn Reflect>` which is easier to understand since you have to deal with fewer types - there is another `ReflectMut` type that could be confused with this one ## Solution/Changelog - relax `T: ?Sized` bound in `Mut<T>` - replace all instances of `ReflectMut` with `Mut<dyn Reflect>`
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parent
397b6df023
commit
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2 changed files with 20 additions and 28 deletions
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@ -2,7 +2,6 @@
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use crate::{component::ComponentTicks, ptr::PtrMut, system::Resource};
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#[cfg(feature = "bevy_reflect")]
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use bevy_reflect::Reflect;
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use std::ops::{Deref, DerefMut};
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/// The (arbitrarily chosen) minimum number of world tick increments between `check_tick` scans.
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@ -230,7 +229,7 @@ impl<'a, T: 'static> From<NonSendMut<'a, T>> for Mut<'a, T> {
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}
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/// Unique mutable borrow of an entity's component
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pub struct Mut<'a, T> {
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pub struct Mut<'a, T: ?Sized> {
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pub(crate) value: &'a mut T,
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pub(crate) ticks: Ticks<'a>,
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}
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@ -239,18 +238,6 @@ change_detection_impl!(Mut<'a, T>, T,);
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impl_into_inner!(Mut<'a, T>, T,);
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impl_debug!(Mut<'a, T>,);
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/// Unique mutable borrow of a reflected component or resource
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#[cfg(feature = "bevy_reflect")]
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pub struct ReflectMut<'a> {
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pub(crate) value: &'a mut dyn Reflect,
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pub(crate) ticks: Ticks<'a>,
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}
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#[cfg(feature = "bevy_reflect")]
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change_detection_impl!(ReflectMut<'a>, dyn Reflect,);
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#[cfg(feature = "bevy_reflect")]
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impl_into_inner!(ReflectMut<'a>, dyn Reflect,);
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/// Unique mutable borrow of resources or an entity's component.
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///
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/// Similar to [`Mut`], but not generic over the component type, instead
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@ -1,7 +1,7 @@
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//! Types that enable reflection support.
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pub use crate::change_detection::ReflectMut;
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use crate::{
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change_detection::Mut,
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component::Component,
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entity::{Entity, EntityMap, MapEntities, MapEntitiesError},
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system::Resource,
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@ -23,7 +23,7 @@ pub struct ReflectComponent {
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apply_or_insert: fn(&mut World, Entity, &dyn Reflect),
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remove: fn(&mut World, Entity),
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reflect: fn(&World, Entity) -> Option<&dyn Reflect>,
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reflect_mut: unsafe fn(&World, Entity) -> Option<ReflectMut>,
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reflect_mut: unsafe fn(&World, Entity) -> Option<Mut<dyn Reflect>>,
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copy: fn(&World, &mut World, Entity, Entity),
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}
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@ -70,7 +70,11 @@ impl ReflectComponent {
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}
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/// Gets the value of this [`Component`] type from the entity as a mutable reflected reference.
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pub fn reflect_mut<'a>(&self, world: &'a mut World, entity: Entity) -> Option<ReflectMut<'a>> {
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pub fn reflect_mut<'a>(
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&self,
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world: &'a mut World,
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entity: Entity,
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) -> Option<Mut<'a, dyn Reflect>> {
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// SAFETY: unique world access
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unsafe { (self.reflect_mut)(world, entity) }
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}
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@ -85,7 +89,7 @@ impl ReflectComponent {
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&self,
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world: &'a World,
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entity: Entity,
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) -> Option<ReflectMut<'a>> {
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) -> Option<Mut<'a, dyn Reflect>> {
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(self.reflect_mut)(world, entity)
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}
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@ -155,7 +159,7 @@ impl<C: Component + Reflect + FromWorld> FromType<C> for ReflectComponent {
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world
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.get_entity(entity)?
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.get_unchecked_mut::<C>(world.last_change_tick(), world.read_change_tick())
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.map(|c| ReflectMut {
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.map(|c| Mut {
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value: c.value as &mut dyn Reflect,
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ticks: c.ticks,
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})
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@ -176,7 +180,7 @@ pub struct ReflectResource {
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apply_or_insert: fn(&mut World, &dyn Reflect),
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remove: fn(&mut World),
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reflect: fn(&World) -> Option<&dyn Reflect>,
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reflect_unchecked_mut: unsafe fn(&World) -> Option<ReflectMut>,
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reflect_unchecked_mut: unsafe fn(&World) -> Option<Mut<dyn Reflect>>,
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copy: fn(&World, &mut World),
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}
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@ -211,7 +215,7 @@ impl ReflectResource {
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}
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/// Gets the value of this [`Resource`] type from the world as a mutable reflected reference.
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pub fn reflect_mut<'a>(&self, world: &'a mut World) -> Option<ReflectMut<'a>> {
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pub fn reflect_mut<'a>(&self, world: &'a mut World) -> Option<Mut<'a, dyn Reflect>> {
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// SAFETY: unique world access
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unsafe { (self.reflect_unchecked_mut)(world) }
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}
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@ -222,7 +226,10 @@ impl ReflectResource {
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/// * Only call this method in an exclusive system to avoid sharing across threads (or use a
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/// scheduler that enforces safe memory access).
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/// * Don't call this method more than once in the same scope for a given [`Resource`].
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pub unsafe fn reflect_unchecked_mut<'a>(&self, world: &'a World) -> Option<ReflectMut<'a>> {
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pub unsafe fn reflect_unchecked_mut<'a>(
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&self,
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world: &'a World,
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) -> Option<Mut<'a, dyn Reflect>> {
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// SAFETY: caller promises to uphold uniqueness guarantees
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(self.reflect_unchecked_mut)(world)
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}
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@ -266,12 +273,10 @@ impl<C: Resource + Reflect + FromWorld> FromType<C> for ReflectResource {
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// SAFETY: all usages of `reflect_unchecked_mut` guarantee that there is either a single mutable
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// reference or multiple immutable ones alive at any given point
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unsafe {
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world
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.get_resource_unchecked_mut::<C>()
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.map(|res| ReflectMut {
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value: res.value as &mut dyn Reflect,
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ticks: res.ticks,
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})
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world.get_resource_unchecked_mut::<C>().map(|res| Mut {
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value: res.value as &mut dyn Reflect,
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ticks: res.ticks,
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})
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}
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},
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copy: |source_world, destination_world| {
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