mirror of https://github.com/rust-lang/rust
34 lines
938 B
Rust
34 lines
938 B
Rust
// A regression test for pyella-0.1.5 which broke when
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// enabling the new solver in coherence.
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//
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// `Tensor: TensorValue` is knowable while `Tensor: TensorOp<?t2>`
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// may be implemented downstream. We previously didn't check the
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// super trait bound in coherence, causing these impls to overlap.
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//
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// However, we did fail to normalize `<Tensor as TensorValue::Unmasked`
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// which caused the old solver to emit a `Tensor: TensorValue` goal in
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// `fn normalize_to_error` which then failed, causing this test to pass.
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//@ revisions: current next
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//@ ignore-compare-mode-next-solver (explicit revisions)
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//@[next] compile-flags: -Znext-solver
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//@ check-pass
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pub trait TensorValue {
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type Unmasked;
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}
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trait TensorCompare<T> {}
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pub trait TensorOp<T>: TensorValue {}
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pub struct Tensor;
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impl<T2> TensorCompare<T2> for Tensor {}
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impl<T1, T2> TensorCompare<T2> for T1
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where
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T1: TensorOp<T2>,
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T1::Unmasked: Sized,
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{}
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fn main() {}
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