don't clone types that are copy (clippy::clone_on_copy)

Author: matthiaskrgr

src/librustc_builtin_macros/deriving/debug.rs

@@ -63,7 +63,7 @@ fn show_substructure(cx: &mut ExtCtxt<'_>, span: Span, substr: &Substructure<'_>
     let span = cx.with_def_site_ctxt(span);
     let name = cx.expr_lit(span, ast::LitKind::Str(ident.name, ast::StrStyle::Cooked));
     let builder = cx.ident_of("debug_trait_builder", span);
-    let builder_expr = cx.expr_ident(span, builder.clone());
+    let builder_expr = cx.expr_ident(span, builder);
 
     let fmt = substr.nonself_args[0].clone();
 

src/librustc_errors/emitter.rs

@@ -2005,7 +2005,7 @@ fn emit_to_destination(
     let _buffer_lock = lock::acquire_global_lock("rustc_errors");
     for (pos, line) in rendered_buffer.iter().enumerate() {
         for part in line {
-            dst.apply_style(lvl.clone(), part.style)?;
+            dst.apply_style(*lvl, part.style)?;
             write!(dst, "{}", part.text)?;
             dst.reset()?;
         }

src/librustc_infer/infer/error_reporting/mod.rs

@@ -871,7 +871,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
                 return Some(());
             }
             if let &ty::Adt(def, _) = &ta.kind {
-                let path_ = self.tcx.def_path_str(def.did.clone());
+                let path_ = self.tcx.def_path_str(def.did);
                 if path_ == other_path {
                     self.highlight_outer(&mut t1_out, &mut t2_out, path, sub, i, &other_ty);
                     return Some(());
@@ -1091,8 +1091,8 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
                 let sub_no_defaults_1 = self.strip_generic_default_params(def1.did, sub1);
                 let sub_no_defaults_2 = self.strip_generic_default_params(def2.did, sub2);
                 let mut values = (DiagnosticStyledString::new(), DiagnosticStyledString::new());
-                let path1 = self.tcx.def_path_str(def1.did.clone());
-                let path2 = self.tcx.def_path_str(def2.did.clone());
+                let path1 = self.tcx.def_path_str(def1.did);
+                let path2 = self.tcx.def_path_str(def2.did);
                 if def1.did == def2.did {
                     // Easy case. Replace same types with `_` to shorten the output and highlight
                     // the differing ones.

src/librustc_infer/infer/outlives/obligations.rs

@@ -452,7 +452,7 @@ where
         // even though a satisfactory solution exists.
         let generic = GenericKind::Projection(projection_ty);
         let verify_bound = self.verify_bound.generic_bound(generic);
-        self.delegate.push_verify(origin, generic.clone(), region, verify_bound);
+        self.delegate.push_verify(origin, generic, region, verify_bound);
     }
 }
 

src/librustc_mir/borrow_check/mod.rs

@@ -1056,7 +1056,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                                  place: {:?}",
                                 place_span.0
                             );
-                            this.reservation_error_reported.insert(place_span.0.clone());
+                            this.reservation_error_reported.insert(place_span.0);
                         }
                         Activation(_, activating) => {
                             debug!(

src/librustc_mir/dataflow/move_paths/builder.rs

@@ -286,7 +286,7 @@ impl<'b, 'a, 'tcx> Gatherer<'b, 'a, 'tcx> {
                     // Box starts out uninitialized - need to create a separate
                     // move-path for the interior so it will be separate from
                     // the exterior.
-                    self.create_move_path(self.builder.tcx.mk_place_deref(place.clone()));
+                    self.create_move_path(self.builder.tcx.mk_place_deref(*place));
                     self.gather_init(place.as_ref(), InitKind::Shallow);
                 } else {
                     self.gather_init(place.as_ref(), InitKind::Deep);
@@ -458,9 +458,8 @@ impl<'b, 'a, 'tcx> Gatherer<'b, 'a, 'tcx> {
             for offset in from..to {
                 let elem =
                     ProjectionElem::ConstantIndex { offset, min_length: len, from_end: false };
-                let path = self.add_move_path(base_path, &elem, |tcx| {
-                    tcx.mk_place_elem(base_place.clone(), elem)
-                });
+                let path =
+                    self.add_move_path(base_path, &elem, |tcx| tcx.mk_place_elem(base_place, elem));
                 self.record_move(place, path);
             }
         } else {

src/librustc_mir/monomorphize/collector.rs

@@ -335,7 +335,7 @@ fn collect_items_rec<'tcx>(
     recursion_depths: &mut DefIdMap<usize>,
     inlining_map: MTRef<'_, MTLock<InliningMap<'tcx>>>,
 ) {
-    if !visited.lock_mut().insert(starting_point.clone()) {
+    if !visited.lock_mut().insert(starting_point) {
         // We've been here already, no need to search again.
         return;
     }

src/librustc_mir/shim.rs

@@ -538,7 +538,7 @@ impl CloneShimBuilder<'tcx> {
         // BB #2
         // `dest[i] = Clone::clone(src[beg])`;
         // Goto #3 if ok, #5 if unwinding happens.
-        let dest_field = self.tcx.mk_place_index(dest.clone(), beg);
+        let dest_field = self.tcx.mk_place_index(dest, beg);
         let src_field = self.tcx.mk_place_index(src, beg);
         self.make_clone_call(dest_field, src_field, ty, BasicBlock::new(3), BasicBlock::new(5));
 
@@ -620,9 +620,9 @@ impl CloneShimBuilder<'tcx> {
         let mut previous_field = None;
         for (i, ity) in tys.enumerate() {
             let field = Field::new(i);
-            let src_field = self.tcx.mk_place_field(src.clone(), field, ity);
+            let src_field = self.tcx.mk_place_field(src, field, ity);
 
-            let dest_field = self.tcx.mk_place_field(dest.clone(), field, ity);
+            let dest_field = self.tcx.mk_place_field(dest, field, ity);
 
             // #(2i + 1) is the cleanup block for the previous clone operation
             let cleanup_block = self.block_index_offset(1);
@@ -633,7 +633,7 @@ impl CloneShimBuilder<'tcx> {
             // BB #(2i)
             // `dest.i = Clone::clone(&src.i);`
             // Goto #(2i + 2) if ok, #(2i + 1) if unwinding happens.
-            self.make_clone_call(dest_field.clone(), src_field, ity, next_block, cleanup_block);
+            self.make_clone_call(dest_field, src_field, ity, next_block, cleanup_block);
 
             // BB #(2i + 1) (cleanup)
             if let Some((previous_field, previous_cleanup)) = previous_field.take() {

src/librustc_mir/transform/inline.rs

@@ -582,7 +582,7 @@ impl Inliner<'tcx> {
             let tuple_tmp_args = tuple_tys.iter().enumerate().map(|(i, ty)| {
                 // This is e.g., `tuple_tmp.0` in our example above.
                 let tuple_field =
-                    Operand::Move(tcx.mk_place_field(tuple.clone(), Field::new(i), ty.expect_ty()));
+                    Operand::Move(tcx.mk_place_field(tuple, Field::new(i), ty.expect_ty()));
 
                 // Spill to a local to make e.g., `tmp0`.
                 self.create_temp_if_necessary(tuple_field, callsite, caller_body)

src/librustc_mir/util/aggregate.rs

@@ -56,7 +56,7 @@ pub fn expand_aggregate<'tcx>(
                 let offset = i as u32;
                 assert_eq!(offset as usize, i);
                 tcx.mk_place_elem(
-                    lhs.clone(),
+                    lhs,
                     ProjectionElem::ConstantIndex {
                         offset,
                         // FIXME(eddyb) `min_length` doesn't appear to be used.
@@ -66,7 +66,7 @@ pub fn expand_aggregate<'tcx>(
                 )
             } else {
                 let field = Field::new(active_field_index.unwrap_or(i));
-                tcx.mk_place_field(lhs.clone(), field, ty)
+                tcx.mk_place_field(lhs, field, ty)
             };
             Statement { source_info, kind: StatementKind::Assign(box (lhs_field, Rvalue::Use(op))) }
         })