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# Objective The pointer types introduced in #3001 are useful not just in `bevy_ecs`, but also in crates like `bevy_reflect` (#4475) or even outside of bevy. ## Solution Extract `Ptr<'a>`, `PtrMut<'a>`, `OwnedPtr<'a>`, `ThinSlicePtr<'a, T>` and `UnsafeCellDeref` from `bevy_ecs::ptr` into `bevy_ptr`. **Note:** `bevy_ecs` still reexports the `bevy_ptr` as `bevy_ecs::ptr` so that crates like `bevy_transform` can use the `Bundle` derive without needing to depend on `bevy_ptr` themselves.
8 lines
479 B
Markdown
8 lines
479 B
Markdown
# `bevy_ptr`
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The `bevy_ptr` crate provides low-level abstractions for working with pointers in a more safe way than using rust's raw pointers.
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Rust has lifetimed and typed references (`&'a T`), unlifetimed and typed references (`*const T`), but no lifetimed but untyped references.
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`bevy_ptr` adds them, called `Ptr<'a>`, `PtrMut<'a>` and `OwningPtr<'a>`.
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These types are lifetime-checked so can never lead to problems like use-after-frees and must always point to valid data.
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