src/test/ui/implied-bounds/issue-101951.rs

   1 // Taken directly from that issue.
   2 //
   3 // This test detected that we didn't correctly resolve
   4 // inference variables when computing implied bounds.
   5 //
   6 // check-pass
   7 pub trait BuilderFn<'a> {
   8     type Output;
   9 }
  10
  11 impl<'a, F, Out> BuilderFn<'a> for F
  12 where
  13     F: FnOnce(&'a mut ()) -> Out,
  14 {
  15     type Output = Out;
  16 }
  17
  18 pub trait ConstructionFirm {
  19     type Builder: for<'a> BuilderFn<'a>;
  20 }
  21
  22 pub trait Campus<T>
  23 where
  24     T: ConstructionFirm,
  25 {
  26     fn add_building(
  27         &mut self,
  28         building: &mut <<T as ConstructionFirm>::Builder as BuilderFn<'_>>::Output,
  29     );
  30 }
  31
  32 struct ArchitectsInc {}
  33
  34 impl ConstructionFirm for ArchitectsInc {
  35     type Builder = fn(&mut ()) -> PrettyCondo<'_>;
  36 }
  37
  38 struct PrettyCondo<'a> {
  39     _marker: &'a mut (),
  40 }
  41
  42 struct CondoEstate {}
  43
  44 impl Campus<ArchitectsInc> for CondoEstate {
  45     fn add_building(&mut self, _building: &mut PrettyCondo<'_>) {
  46         todo!()
  47     }
  48 }
  49
  50 fn main() {}