Merging upstream version 1.71.1+dfsg1.

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

1 files changed, 18 insertions, 44 deletions

diff --git a/compiler/rustc_middle/src/ty/trait_def.rs b/compiler/rustc_middle/src/ty/trait_def.rs
index 6747da7ab..e61037e5e 100644
--- a/compiler/rustc_middle/src/ty/trait_def.rs
+++ b/compiler/rustc_middle/src/ty/trait_def.rs
@@ -139,40 +139,6 @@ impl<'tcx> TyCtxt<'tcx> {
         treat_projections: TreatProjections,
         mut f: impl FnMut(DefId),
     ) {
-        let _: Option<()> =
-            self.find_map_relevant_impl(trait_def_id, self_ty, treat_projections, |did| {
-                f(did);
-                None
-            });
-    }
-
-    /// `trait_def_id` MUST BE the `DefId` of a trait.
-    pub fn non_blanket_impls_for_ty(
-        self,
-        trait_def_id: DefId,
-        self_ty: Ty<'tcx>,
-    ) -> impl Iterator<Item = DefId> + 'tcx {
-        let impls = self.trait_impls_of(trait_def_id);
-        if let Some(simp) = fast_reject::simplify_type(self, self_ty, TreatParams::AsCandidateKey) {
-            if let Some(impls) = impls.non_blanket_impls.get(&simp) {
-                return impls.iter().copied();
-            }
-        }
-
-        [].iter().copied()
-    }
-
-    /// Applies function to every impl that could possibly match the self type `self_ty` and returns
-    /// the first non-none value.
-    ///
-    /// `trait_def_id` MUST BE the `DefId` of a trait.
-    pub fn find_map_relevant_impl<T>(
-        self,
-        trait_def_id: DefId,
-        self_ty: Ty<'tcx>,
-        treat_projections: TreatProjections,
-        mut f: impl FnMut(DefId) -> Option<T>,
-    ) -> Option<T> {
         // FIXME: This depends on the set of all impls for the trait. That is
         // unfortunate wrt. incremental compilation.
         //
@@ -181,9 +147,7 @@ impl<'tcx> TyCtxt<'tcx> {
         let impls = self.trait_impls_of(trait_def_id);
 
         for &impl_def_id in impls.blanket_impls.iter() {
-            if let result @ Some(_) = f(impl_def_id) {
-                return result;
-            }
+            f(impl_def_id);
         }
 
         // Note that we're using `TreatParams::ForLookup` to query `non_blanket_impls` while using
@@ -199,20 +163,30 @@ impl<'tcx> TyCtxt<'tcx> {
         if let Some(simp) = fast_reject::simplify_type(self, self_ty, treat_params) {
             if let Some(impls) = impls.non_blanket_impls.get(&simp) {
                 for &impl_def_id in impls {
-                    if let result @ Some(_) = f(impl_def_id) {
-                        return result;
-                    }
+                    f(impl_def_id);
                 }
             }
         } else {
             for &impl_def_id in impls.non_blanket_impls.values().flatten() {
-                if let result @ Some(_) = f(impl_def_id) {
-                    return result;
-                }
+                f(impl_def_id);
             }
         }
+    }
 
-        None
+    /// `trait_def_id` MUST BE the `DefId` of a trait.
+    pub fn non_blanket_impls_for_ty(
+        self,
+        trait_def_id: DefId,
+        self_ty: Ty<'tcx>,
+    ) -> impl Iterator<Item = DefId> + 'tcx {
+        let impls = self.trait_impls_of(trait_def_id);
+        if let Some(simp) = fast_reject::simplify_type(self, self_ty, TreatParams::AsCandidateKey) {
+            if let Some(impls) = impls.non_blanket_impls.get(&simp) {
+                return impls.iter().copied();
+            }
+        }
+
+        [].iter().copied()
     }
 
     /// Returns an iterator containing all impls for `trait_def_id`.