31 lines
516 B
Rust
31 lines
516 B
Rust
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// Test that specializing on the well-formed predicates of the trait and
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// self-type of an impl is allowed.
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// check-pass
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#![feature(min_specialization)]
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struct OrdOnly<T: Ord>(T);
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trait SpecTrait<U> {
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fn f();
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}
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impl<T, U> SpecTrait<U> for T {
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default fn f() {}
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}
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impl<T: Ord> SpecTrait<()> for OrdOnly<T> {
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fn f() {}
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}
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impl<T: Ord> SpecTrait<OrdOnly<T>> for () {
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fn f() {}
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}
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impl<T: Ord, U: Ord, V: Ord> SpecTrait<(OrdOnly<T>, OrdOnly<U>)> for &[OrdOnly<V>] {
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fn f() {}
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}
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fn main() {}
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