32 lines
782 B
Rust
32 lines
782 B
Rust
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//@ revisions: current next
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//@[next] compile-flags: -Znext-solver
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//@ ignore-compare-mode-next-solver (explicit revisions)
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//@[current] check-pass
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// Regression test for trait-system-refactor-initiative#205. Avoid
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// constraining other impl arguments when applying blanket impls.
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// FIXME(-Znext-solver): This currently incompletely constrains the
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// argument of `opaque: Trait<?x>` using the blanket impl of trait.
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// Ideally we don't do that.
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trait Trait<T> {}
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impl<T> Trait<u64> for T {}
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impl Trait<u32> for u64 {}
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fn impls_trait<T: Trait<U>, U>(_: U) -> T {
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todo!()
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}
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fn foo() -> impl Sized {
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let x = Default::default();
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if false {
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return impls_trait::<_, _>(x);
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}
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let _: u32 = x;
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//[next]~^ ERROR mismatched types
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1u64
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}
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fn main() {}
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