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remove is global hack
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ouz-a committed Oct 5, 2023
1 parent 9fbd593 commit 712a894
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Showing 2 changed files with 23 additions and 15 deletions.
17 changes: 2 additions & 15 deletions compiler/rustc_middle/src/ty/mod.rs
Original file line number Diff line number Diff line change
Expand Up @@ -1754,28 +1754,15 @@ impl<'tcx> ParamEnv<'tcx> {

/// Creates a suitable environment in which to perform trait
/// queries on the given value. When type-checking, this is simply
/// the pair of the environment plus value. But when reveal is set to
/// All, then if `value` does not reference any type parameters, we will
/// pair it with the empty environment. This improves caching and is generally
/// invisible.
/// the pair of the environment plus value.
///
/// N.B., we preserve the environment when type-checking because it
/// is possible for the user to have wacky where-clauses like
/// `where Box<u32>: Copy`, which are clearly never
/// satisfiable. We generally want to behave as if they were true,
/// although the surrounding function is never reachable.
pub fn and<T: TypeVisitable<TyCtxt<'tcx>>>(self, value: T) -> ParamEnvAnd<'tcx, T> {
match self.reveal() {
Reveal::UserFacing => ParamEnvAnd { param_env: self, value },

Reveal::All => {
if value.is_global() {
ParamEnvAnd { param_env: self.without_caller_bounds(), value }
} else {
ParamEnvAnd { param_env: self, value }
}
}
}
ParamEnvAnd { param_env: self, value }
}
}

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21 changes: 21 additions & 0 deletions tests/ui/traits/associated_type_bound/impl-is-shadowed.rs
Original file line number Diff line number Diff line change
@@ -0,0 +1,21 @@
// check-pass
trait Bar<'a> {
type Assoc: 'static;
}

impl<'a> Bar<'a> for () {
type Assoc = ();
}

struct ImplsStatic<CG: Bar<'static>> {
d: &'static <CG as Bar<'static>>::Assoc,
}

fn caller(b: ImplsStatic<()>)
where
for<'a> (): Bar<'a>
{
let _: &<() as Bar<'static>>::Assoc = b.d;
}

fn main() {}

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