1 files changed, 4 insertions, 11 deletions
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/match_check.rs b/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/match_check.rs
index d51ad72bd..8b0f051b4 100644
--- a/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/match_check.rs
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/match_check.rs
@@ -12,16 +12,16 @@ pub(crate) mod usefulness;
 
 use chalk_ir::Mutability;
 use hir_def::{
-    adt::VariantData, body::Body, expr::PatId, AdtId, EnumVariantId, HasModule, LocalFieldId,
-    VariantId,
+    adt::VariantData, body::Body, expr::PatId, AdtId, EnumVariantId, LocalFieldId, VariantId,
 };
-use hir_expand::name::{name, Name};
+use hir_expand::name::Name;
 use stdx::{always, never};
 
 use crate::{
     db::HirDatabase,
     display::{HirDisplay, HirDisplayError, HirFormatter},
     infer::BindingMode,
+    lang_items::is_box,
     InferenceResult, Interner, Substitution, Ty, TyExt, TyKind,
 };
 
@@ -386,7 +386,7 @@ impl HirDisplay for Pat {
                 }
                 subpattern.hir_fmt(f)
             }
-            PatKind::LiteralBool { value } => write!(f, "{}", value),
+            PatKind::LiteralBool { value } => write!(f, "{value}"),
             PatKind::Or { pats } => f.write_joined(pats.iter(), " | "),
         }
     }
@@ -405,13 +405,6 @@ where
     }
 }
 
-fn is_box(adt: AdtId, db: &dyn HirDatabase) -> bool {
-    let owned_box = name![owned_box].to_smol_str();
-    let krate = adt.module(db.upcast()).krate();
-    let box_adt = db.lang_item(krate, owned_box).and_then(|it| it.as_struct()).map(AdtId::from);
-    Some(adt) == box_adt
-}
-
 pub(crate) trait PatternFoldable: Sized {
     fn fold_with<F: PatternFolder>(&self, folder: &mut F) -> Self {
         self.super_fold_with(folder)