mirror of https://github.com/rust-lang/rust
51 lines
922 B
Rust
51 lines
922 B
Rust
// Taken directly from that issue.
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//
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// This test detected that we didn't correctly resolve
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// inference variables when computing implied bounds.
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//
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//@ check-pass
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pub trait BuilderFn<'a> {
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type Output;
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}
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impl<'a, F, Out> BuilderFn<'a> for F
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where
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F: FnOnce(&'a mut ()) -> Out,
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{
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type Output = Out;
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}
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pub trait ConstructionFirm {
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type Builder: for<'a> BuilderFn<'a>;
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}
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pub trait Campus<T>
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where
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T: ConstructionFirm,
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{
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fn add_building(
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&mut self,
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building: &mut <<T as ConstructionFirm>::Builder as BuilderFn<'_>>::Output,
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);
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}
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struct ArchitectsInc {}
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impl ConstructionFirm for ArchitectsInc {
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type Builder = fn(&mut ()) -> PrettyCondo<'_>;
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}
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struct PrettyCondo<'a> {
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_marker: &'a mut (),
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}
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struct CondoEstate {}
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impl Campus<ArchitectsInc> for CondoEstate {
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fn add_building(&mut self, _building: &mut PrettyCondo<'_>) {
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todo!()
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}
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}
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fn main() {}
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