56 lines
1.4 KiB
Rust
56 lines
1.4 KiB
Rust
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// compile-flags: --crate-type lib
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// check-pass
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//
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// Regression test for issue #84399
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// Tests that we keep the full `ParamEnv` when
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// caching predicates with freshened types in the global cache
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use std::marker::PhantomData;
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pub trait Allocator<R> {
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type Buffer;
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}
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pub struct DefaultAllocator;
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impl <R> Allocator<R> for DefaultAllocator {
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type Buffer = ();
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}
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pub type Owned<R> = <DefaultAllocator as Allocator<R>>::Buffer;
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pub type MatrixMN<R> = Matrix<R, Owned<R>>;
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pub type Matrix4<N> = Matrix<N, ()>;
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pub struct Matrix<R, S> {
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pub data: S,
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_phantoms: PhantomData<R>,
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}
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pub fn set_object_transform(matrix: &Matrix4<()>) {
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matrix.js_buffer_view();
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}
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pub trait Storable {
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type Cell;
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fn slice_to_items(_buffer: &()) -> &[Self::Cell] {
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unimplemented!()
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}
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}
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pub type Cell<T> = <T as Storable>::Cell;
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impl<R> Storable for MatrixMN<R>
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where
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DefaultAllocator: Allocator<R>,
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{
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type Cell = ();
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}
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pub trait JsBufferView {
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fn js_buffer_view(&self) -> usize {
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unimplemented!()
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}
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}
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impl<R> JsBufferView for [MatrixMN<R>]
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where
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DefaultAllocator: Allocator<R>,
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MatrixMN<R>: Storable,
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[Cell<MatrixMN<R>>]: JsBufferView,
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{
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fn js_buffer_view(&self) -> usize {
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<MatrixMN<R> as Storable>::slice_to_items(&()).js_buffer_view()
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}
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}
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impl JsBufferView for [()] {}
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impl<R> JsBufferView for MatrixMN<R> where DefaultAllocator: Allocator<R> {}
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