ambee/giterated

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Amber - ⁨1⁩ year ago

parent: tbd commit: ⁨e432306⁩

⁨giterated-abi/src/vtable/mod.rs⁩ - ⁨854⁩ bytes

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1	use std::{marker::PhantomData, mem::transmute, ops::Deref};
2
3	mod object;
4	pub mod operation;
5	mod setting;
6	mod value;
7
8	pub use object::*;
9	pub use setting::*;
10	pub use value::*;
11
12	pub trait ObjectABI {
13	type VTable;
14	}
15
16	#[repr(transparent)]
17	pub struct VTable<T: ObjectABI> {
18	_marker: PhantomData<T>,
19	}
20
21	impl<T: ObjectABI> VTable<T> {
22	/// Creates a new `VTable<T>` reference to a static vtable in memory.
23	///
24	/// Might be unsafe? It seems like it should be safe...
25	pub const fn new<V>(vtable: &'static V) -> &'static Self {
26	// We're going to transmute the reference to the typed vtable to us
27	// which will probably be fine
28	unsafe { transmute(vtable) }
29	}
30	}
31
32	impl<T: ObjectABI> Deref for VTable<T> {
33	type Target = T::VTable;
34
35	fn deref(&self) -> &Self::Target {
36	unsafe { transmute(self) }
37	}
38	}
39