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32 lines
771 B
Rust
32 lines
771 B
Rust
//@ check-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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// Regression test for <https://github.com/rust-lang/rust/issues/141708>.
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// See description in there; this has to do with fundamental limitations
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// to the old trait solver surrounding higher-ranked aliases with infer
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// vars. This always worked in the new trait solver, but I added a revision
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// just for good measure.
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trait Foo<'a> {
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type Assoc;
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}
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impl Foo<'_> for i32 {
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type Assoc = u32;
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}
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impl Foo<'_> for u32 {
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type Assoc = u32;
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}
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fn foo<'b: 'b, T: for<'a> Foo<'a>, F: for<'a> Fn(<T as Foo<'a>>::Assoc)>(_: F) -> (T, F) {
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todo!()
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}
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fn main() {
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let (x, c): (i32, _) = foo::<'static, _, _>(|_| {});
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}
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