1 files changed, 0 insertions, 90 deletions
diff --git a/compiler/rustc_typeck/src/outlives/outlives_bounds.rs b/compiler/rustc_typeck/src/outlives/outlives_bounds.rs
deleted file mode 100644
index 229a64650..000000000
--- a/compiler/rustc_typeck/src/outlives/outlives_bounds.rs
+++ /dev/null
@@ -1,90 +0,0 @@
-use rustc_hir as hir;
-use rustc_middle::ty::{self, Ty};
-use rustc_trait_selection::infer::InferCtxt;
-use rustc_trait_selection::traits::query::type_op::{self, TypeOp, TypeOpOutput};
-use rustc_trait_selection::traits::query::NoSolution;
-use rustc_trait_selection::traits::{ObligationCause, TraitEngine, TraitEngineExt};
-
-pub use rustc_middle::traits::query::OutlivesBound;
-
-pub trait InferCtxtExt<'tcx> {
-    fn implied_outlives_bounds(
-        &self,
-        param_env: ty::ParamEnv<'tcx>,
-        body_id: hir::HirId,
-        ty: Ty<'tcx>,
-    ) -> Vec<OutlivesBound<'tcx>>;
-}
-
-impl<'cx, 'tcx> InferCtxtExt<'tcx> for InferCtxt<'cx, 'tcx> {
-    /// Implied bounds are region relationships that we deduce
-    /// automatically. The idea is that (e.g.) a caller must check that a
-    /// function's argument types are well-formed immediately before
-    /// calling that fn, and hence the *callee* can assume that its
-    /// argument types are well-formed. This may imply certain relationships
-    /// between generic parameters. For example:
-    /// ```
-    /// fn foo<'a,T>(x: &'a T) {}
-    /// ```
-    /// can only be called with a `'a` and `T` such that `&'a T` is WF.
-    /// For `&'a T` to be WF, `T: 'a` must hold. So we can assume `T: 'a`.
-    ///
-    /// # Parameters
-    ///
-    /// - `param_env`, the where-clauses in scope
-    /// - `body_id`, the body-id to use when normalizing assoc types.
-    ///   Note that this may cause outlives obligations to be injected
-    ///   into the inference context with this body-id.
-    /// - `ty`, the type that we are supposed to assume is WF.
-    #[instrument(level = "debug", skip(self, param_env, body_id))]
-    fn implied_outlives_bounds(
-        &self,
-        param_env: ty::ParamEnv<'tcx>,
-        body_id: hir::HirId,
-        ty: Ty<'tcx>,
-    ) -> Vec<OutlivesBound<'tcx>> {
-        let span = self.tcx.hir().span(body_id);
-        let result = param_env
-            .and(type_op::implied_outlives_bounds::ImpliedOutlivesBounds { ty })
-            .fully_perform(self);
-        let result = match result {
-            Ok(r) => r,
-            Err(NoSolution) => {
-                self.tcx.sess.delay_span_bug(
-                    span,
-                    "implied_outlives_bounds failed to solve all obligations",
-                );
-                return vec![];
-            }
-        };
-
-        let TypeOpOutput { output, constraints, .. } = result;
-
-        if let Some(constraints) = constraints {
-            // Instantiation may have produced new inference variables and constraints on those
-            // variables. Process these constraints.
-            let mut fulfill_cx = <dyn TraitEngine<'tcx>>::new(self.tcx);
-            let cause = ObligationCause::misc(span, body_id);
-            for &constraint in &constraints.outlives {
-                let obligation = self.query_outlives_constraint_to_obligation(
-                    constraint,
-                    cause.clone(),
-                    param_env,
-                );
-                fulfill_cx.register_predicate_obligation(self, obligation);
-            }
-            if !constraints.member_constraints.is_empty() {
-                span_bug!(span, "{:#?}", constraints.member_constraints);
-            }
-            let errors = fulfill_cx.select_all_or_error(self);
-            if !errors.is_empty() {
-                self.tcx.sess.delay_span_bug(
-                    span,
-                    "implied_outlives_bounds failed to solve obligations from instantiation",
-                );
-            }
-        };
-
-        output
-    }
-}