Merging upstream version 1.67.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 0 insertions, 41 deletions

diff --git a/vendor/chalk-ir-0.80.0/src/visit/visitors.rs b/vendor/chalk-ir-0.80.0/src/visit/visitors.rs
deleted file mode 100644
index 486b51d86..000000000
--- a/vendor/chalk-ir-0.80.0/src/visit/visitors.rs
+++ /dev/null
@@ -1,41 +0,0 @@
-//! Visitor helpers
-
-use crate::{BoundVar, ControlFlow, DebruijnIndex, Interner, Visit, Visitor};
-
-/// Visitor extensions.
-pub trait VisitExt<I: Interner>: Visit<I> {
-    /// Check whether there are free (non-bound) variables.
-    fn has_free_vars(&self, interner: I) -> bool {
-        let flow = self.visit_with(
-            &mut FindFreeVarsVisitor { interner },
-            DebruijnIndex::INNERMOST,
-        );
-        matches!(flow, ControlFlow::Break(_))
-    }
-}
-
-impl<T, I: Interner> VisitExt<I> for T where T: Visit<I> {}
-
-struct FindFreeVarsVisitor<I: Interner> {
-    interner: I,
-}
-
-impl<I: Interner> Visitor<I> for FindFreeVarsVisitor<I> {
-    type BreakTy = ();
-
-    fn as_dyn(&mut self) -> &mut dyn Visitor<I, BreakTy = Self::BreakTy> {
-        self
-    }
-
-    fn interner(&self) -> I {
-        self.interner
-    }
-
-    fn visit_free_var(
-        &mut self,
-        _bound_var: BoundVar,
-        _outer_binder: DebruijnIndex,
-    ) -> ControlFlow<()> {
-        ControlFlow::Break(())
-    }
-}