Don't redundantly repeat field names (clippy::redundant_field_names)

src/liballoc/collections/linked_list.rs

@@ -959,7 +959,7 @@ impl<T> LinkedList<T> {
         let it = self.head;
         let old_len = self.len;
 
-        DrainFilter { list: self, it: it, pred: filter, idx: 0, old_len: old_len }
+        DrainFilter { list: self, it, pred: filter, idx: 0, old_len }
     }
 }
 

src/liballoc/vec.rs

@@ -1659,7 +1659,7 @@ struct SetLenOnDrop<'a> {
 impl<'a> SetLenOnDrop<'a> {
     #[inline]
     fn new(len: &'a mut usize) -> Self {
-        SetLenOnDrop { local_len: *len, len: len }
+        SetLenOnDrop { local_len: *len, len }
     }
 
     #[inline]

src/libproc_macro/diagnostic.rs

@@ -55,13 +55,15 @@ pub struct Diagnostic {
 }
 
 macro_rules! diagnostic_child_methods {
-    ($spanned:ident, $regular:ident, $level:expr) => (
+    ($spanned:ident, $regular:ident, $level:expr) => {
         /// Adds a new child diagnostic message to `self` with the level
         /// identified by this method's name with the given `spans` and
         /// `message`.
         #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
         pub fn $spanned<S, T>(mut self, spans: S, message: T) -> Diagnostic
-            where S: MultiSpan, T: Into<String>
+        where
+            S: MultiSpan,
+            T: Into<String>,
         {
             self.children.push(Diagnostic::spanned(spans, $level, message));
             self
@@ -74,7 +76,7 @@ macro_rules! diagnostic_child_methods {
             self.children.push(Diagnostic::new($level, message));
             self
         }
-    )
+    };
 }
 
 /// Iterator over the children diagnostics of a `Diagnostic`.
@@ -96,7 +98,7 @@ impl Diagnostic {
     /// Creates a new diagnostic with the given `level` and `message`.
     #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
     pub fn new<T: Into<String>>(level: Level, message: T) -> Diagnostic {
-        Diagnostic { level: level, message: message.into(), spans: vec![], children: vec![] }
+        Diagnostic { level, message: message.into(), spans: vec![], children: vec![] }
     }
 
     /// Creates a new diagnostic with the given `level` and `message` pointing to
@@ -107,12 +109,7 @@ impl Diagnostic {
         S: MultiSpan,
         T: Into<String>,
     {
-        Diagnostic {
-            level: level,
-            message: message.into(),
-            spans: spans.into_spans(),
-            children: vec![],
-        }
+        Diagnostic { level, message: message.into(), spans: spans.into_spans(), children: vec![] }
     }
 
     diagnostic_child_methods!(span_error, error, Level::Error);

src/librustc/hir/map/definitions.rs

@@ -192,7 +192,7 @@ impl DefPath {
             }
         }
         data.reverse();
-        DefPath { data: data, krate: krate }
+        DefPath { data, krate }
     }
 
     /// Returns a string representation of the `DefPath` without

src/librustc/mir/mono.rs

@@ -258,7 +258,7 @@ pub enum Visibility {
 
 impl<'tcx> CodegenUnit<'tcx> {
     pub fn new(name: Symbol) -> CodegenUnit<'tcx> {
-        CodegenUnit { name: name, items: Default::default(), size_estimate: None }
+        CodegenUnit { name, items: Default::default(), size_estimate: None }
     }
 
     pub fn name(&self) -> Symbol {

src/librustc/traits/structural_impls.rs

@@ -532,9 +532,9 @@ impl<'a, 'tcx> Lift<'tcx> for traits::Vtable<'a, ()> {
                 nested,
             }) => tcx.lift(&substs).map(|substs| {
                 traits::VtableGenerator(traits::VtableGeneratorData {
-                    generator_def_id: generator_def_id,
-                    substs: substs,
-                    nested: nested,
+                    generator_def_id,
+                    substs,
+                    nested,
                 })
             }),
             traits::VtableClosure(traits::VtableClosureData { closure_def_id, substs, nested }) => {

src/librustc/ty/context.rs

@@ -2256,22 +2256,22 @@ impl<'tcx> TyCtxt<'tcx> {
 
     #[inline]
     pub fn mk_mut_ref(self, r: Region<'tcx>, ty: Ty<'tcx>) -> Ty<'tcx> {
-        self.mk_ref(r, TypeAndMut { ty: ty, mutbl: hir::Mutability::Mut })
+        self.mk_ref(r, TypeAndMut { ty, mutbl: hir::Mutability::Mut })
     }
 
     #[inline]
     pub fn mk_imm_ref(self, r: Region<'tcx>, ty: Ty<'tcx>) -> Ty<'tcx> {
-        self.mk_ref(r, TypeAndMut { ty: ty, mutbl: hir::Mutability::Not })
+        self.mk_ref(r, TypeAndMut { ty, mutbl: hir::Mutability::Not })
     }
 
     #[inline]
     pub fn mk_mut_ptr(self, ty: Ty<'tcx>) -> Ty<'tcx> {
-        self.mk_ptr(TypeAndMut { ty: ty, mutbl: hir::Mutability::Mut })
+        self.mk_ptr(TypeAndMut { ty, mutbl: hir::Mutability::Mut })
     }
 
     #[inline]
     pub fn mk_imm_ptr(self, ty: Ty<'tcx>) -> Ty<'tcx> {
-        self.mk_ptr(TypeAndMut { ty: ty, mutbl: hir::Mutability::Not })
+        self.mk_ptr(TypeAndMut { ty, mutbl: hir::Mutability::Not })
     }
 
     #[inline]
@@ -2393,7 +2393,7 @@ impl<'tcx> TyCtxt<'tcx> {
 
     #[inline]
     pub fn mk_ty_param(self, index: u32, name: Symbol) -> Ty<'tcx> {
-        self.mk_ty(Param(ParamTy { index, name: name }))
+        self.mk_ty(Param(ParamTy { index, name }))
     }
 
     #[inline]

src/librustc/ty/instance.rs

@@ -241,7 +241,7 @@ impl<'tcx> Instance<'tcx> {
             def_id,
             substs
         );
-        Instance { def: InstanceDef::Item(def_id), substs: substs }
+        Instance { def: InstanceDef::Item(def_id), substs }
     }
 
     pub fn mono(tcx: TyCtxt<'tcx>, def_id: DefId) -> Instance<'tcx> {

src/librustc/ty/mod.rs

@@ -370,7 +370,7 @@ pub trait DefIdTree: Copy {
 
 impl<'tcx> DefIdTree for TyCtxt<'tcx> {
     fn parent(self, id: DefId) -> Option<DefId> {
-        self.def_key(id).parent.map(|index| DefId { index: index, ..id })
+        self.def_key(id).parent.map(|index| DefId { index, ..id })
     }
 }
 
@@ -2227,7 +2227,7 @@ impl ReprOptions {
         if !tcx.consider_optimizing(|| format!("Reorder fields of {:?}", tcx.def_path_str(did))) {
             flags.insert(ReprFlags::IS_LINEAR);
         }
-        ReprOptions { int: size, align: max_align, pack: min_pack, flags: flags }
+        ReprOptions { int: size, align: max_align, pack: min_pack, flags }
     }
 
     #[inline]

src/librustc/ty/normalize_erasing_regions.rs

@@ -34,10 +34,7 @@ impl<'tcx> TyCtxt<'tcx> {
         if !value.has_projections() {
             value
         } else {
-            value.fold_with(&mut NormalizeAfterErasingRegionsFolder {
-                tcx: self,
-                param_env: param_env,
-            })
+            value.fold_with(&mut NormalizeAfterErasingRegionsFolder { tcx: self, param_env })
         }
     }
 

src/librustc/ty/relate.rs

@@ -287,7 +287,7 @@ impl<'tcx> Relate<'tcx> for ty::TraitRef<'tcx> {
             Err(TypeError::Traits(expected_found(relation, &a.def_id, &b.def_id)))
         } else {
             let substs = relate_substs(relation, None, a.substs, b.substs)?;
-            Ok(ty::TraitRef { def_id: a.def_id, substs: substs })
+            Ok(ty::TraitRef { def_id: a.def_id, substs })
         }
     }
 }
@@ -303,7 +303,7 @@ impl<'tcx> Relate<'tcx> for ty::ExistentialTraitRef<'tcx> {
             Err(TypeError::Traits(expected_found(relation, &a.def_id, &b.def_id)))
         } else {
             let substs = relate_substs(relation, None, a.substs, b.substs)?;
-            Ok(ty::ExistentialTraitRef { def_id: a.def_id, substs: substs })
+            Ok(ty::ExistentialTraitRef { def_id: a.def_id, substs })
         }
     }
 }

src/librustc/ty/sty.rs

@@ -1193,7 +1193,7 @@ pub struct ParamTy {
 
 impl<'tcx> ParamTy {
     pub fn new(index: u32, name: Symbol) -> ParamTy {
-        ParamTy { index, name: name }
+        ParamTy { index, name }
     }
 
     pub fn for_self() -> ParamTy {

src/librustc_builtin_macros/deriving/generic/mod.rs

@@ -482,7 +482,7 @@ impl<'a> TraitDef<'a> {
                         })
                         .cloned(),
                 );
-                push(Annotatable::Item(P(ast::Item { attrs: attrs, ..(*newitem).clone() })))
+                push(Annotatable::Item(P(ast::Item { attrs, ..(*newitem).clone() })))
             }
             _ => {
                 // Non-Item derive is an error, but it should have been

src/librustc_codegen_llvm/abi.rs

@@ -148,7 +148,7 @@ impl LlvmType for CastTarget {
             .prefix
             .iter()
             .flat_map(|option_kind| {
-                option_kind.map(|kind| Reg { kind: kind, size: self.prefix_chunk }.llvm_type(cx))
+                option_kind.map(|kind| Reg { kind, size: self.prefix_chunk }.llvm_type(cx))
             })
             .chain((0..rest_count).map(|_| rest_ll_unit))
             .collect();

src/librustc_infer/infer/at.rs

@@ -179,7 +179,7 @@ impl<'a, 'tcx> At<'a, 'tcx> {
         T: ToTrace<'tcx>,
     {
         let trace = ToTrace::to_trace(self.cause, a_is_expected, a, b);
-        Trace { at: self, trace: trace, a_is_expected }
+        Trace { at: self, trace, a_is_expected }
     }
 }
 

src/librustc_infer/infer/equate.rs

@@ -19,7 +19,7 @@ impl<'combine, 'infcx, 'tcx> Equate<'combine, 'infcx, 'tcx> {
         fields: &'combine mut CombineFields<'infcx, 'tcx>,
         a_is_expected: bool,
     ) -> Equate<'combine, 'infcx, 'tcx> {
-        Equate { fields: fields, a_is_expected: a_is_expected }
+        Equate { fields, a_is_expected }
     }
 }
 

src/librustc_infer/infer/error_reporting/nice_region_error/util.rs

@@ -77,11 +77,11 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
                             if found_anon_region {
                                 let is_first = index == 0;
                                 Some(AnonymousParamInfo {
-                                    param: param,
+                                    param,
                                     param_ty: new_param_ty,
-                                    param_ty_span: param_ty_span,
-                                    bound_region: bound_region,
-                                    is_first: is_first,
+                                    param_ty_span,
+                                    bound_region,
+                                    is_first,
                                 })
                             } else {
                                 None

src/librustc_infer/infer/glb.rs

@@ -18,7 +18,7 @@ impl<'combine, 'infcx, 'tcx> Glb<'combine, 'infcx, 'tcx> {
         fields: &'combine mut CombineFields<'infcx, 'tcx>,
         a_is_expected: bool,
     ) -> Glb<'combine, 'infcx, 'tcx> {
-        Glb { fields: fields, a_is_expected: a_is_expected }
+        Glb { fields, a_is_expected }
     }
 }
 

src/librustc_infer/infer/lub.rs

@@ -18,7 +18,7 @@ impl<'combine, 'infcx, 'tcx> Lub<'combine, 'infcx, 'tcx> {
         fields: &'combine mut CombineFields<'infcx, 'tcx>,
         a_is_expected: bool,
     ) -> Lub<'combine, 'infcx, 'tcx> {
-        Lub { fields: fields, a_is_expected: a_is_expected }
+        Lub { fields, a_is_expected }
     }
 }
 

src/librustc_infer/infer/region_constraints/leak_check.rs

@@ -85,7 +85,7 @@ impl<'tcx> TaintSet<'tcx> {
     fn new(directions: TaintDirections, initial_region: ty::Region<'tcx>) -> Self {
         let mut regions = FxHashSet::default();
         regions.insert(initial_region);
-        TaintSet { directions: directions, regions: regions }
+        TaintSet { directions, regions }
     }
 
     fn fixed_point(

src/librustc_infer/infer/region_constraints/mod.rs

@@ -766,7 +766,7 @@ impl<'tcx> RegionConstraintCollector<'tcx> {
         b: Region<'tcx>,
         origin: SubregionOrigin<'tcx>,
     ) -> Region<'tcx> {
-        let vars = TwoRegions { a: a, b: b };
+        let vars = TwoRegions { a, b };
         if let Some(&c) = self.combine_map(t).get(&vars) {
             return tcx.mk_region(ReVar(c));
         }

src/librustc_infer/infer/resolve.rs

@@ -160,7 +160,7 @@ pub fn fully_resolve<'a, 'tcx, T>(infcx: &InferCtxt<'a, 'tcx>, value: &T) -> Fix
 where
     T: TypeFoldable<'tcx>,
 {
-    let mut full_resolver = FullTypeResolver { infcx: infcx, err: None };
+    let mut full_resolver = FullTypeResolver { infcx, err: None };
     let result = value.fold_with(&mut full_resolver);
     match full_resolver.err {
         None => Ok(result),

src/librustc_infer/infer/sub.rs

@@ -19,7 +19,7 @@ impl<'combine, 'infcx, 'tcx> Sub<'combine, 'infcx, 'tcx> {
         f: &'combine mut CombineFields<'infcx, 'tcx>,
         a_is_expected: bool,
     ) -> Sub<'combine, 'infcx, 'tcx> {
-        Sub { fields: f, a_is_expected: a_is_expected }
+        Sub { fields: f, a_is_expected }
     }
 
     fn with_expected_switched<R, F: FnOnce(&mut Self) -> R>(&mut self, f: F) -> R {

src/librustc_infer/traits/mod.rs

@@ -619,7 +619,7 @@ impl<'tcx> FulfillmentError<'tcx> {
         obligation: PredicateObligation<'tcx>,
         code: FulfillmentErrorCode<'tcx>,
     ) -> FulfillmentError<'tcx> {
-        FulfillmentError { obligation: obligation, code: code, points_at_arg_span: false }
+        FulfillmentError { obligation, code, points_at_arg_span: false }
     }
 }
 

src/librustc_infer/traits/project.rs

@@ -403,7 +403,7 @@ pub type NormalizedTy<'tcx> = Normalized<'tcx, Ty<'tcx>>;
 
 impl<'tcx, T> Normalized<'tcx, T> {
     pub fn with<U>(self, value: U) -> Normalized<'tcx, U> {
-        Normalized { value: value, obligations: self.obligations }
+        Normalized { value, obligations: self.obligations }
     }
 }
 
@@ -1291,7 +1291,7 @@ fn confirm_generator_candidate<'cx, 'tcx>(
                 substs: trait_ref.substs,
                 item_def_id: obligation.predicate.item_def_id,
             },
-            ty: ty,
+            ty,
         }
     });
 

src/librustc_infer/traits/select.rs

@@ -2923,7 +2923,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
             ty::Predicate::ClosureKind(closure_def_id, substs, kind),
         ));
 
-        Ok(VtableClosureData { closure_def_id, substs: substs, nested: obligations })
+        Ok(VtableClosureData { closure_def_id, substs, nested: obligations })
     }
 
     /// In the case of closure types and fn pointers,

src/librustc_infer/traits/util.rs

@@ -55,7 +55,7 @@ struct PredicateSet<'tcx> {
 
 impl PredicateSet<'tcx> {
     fn new(tcx: TyCtxt<'tcx>) -> Self {
-        Self { tcx: tcx, set: Default::default() }
+        Self { tcx, set: Default::default() }
     }
 
     fn insert(&mut self, pred: &ty::Predicate<'tcx>) -> bool {

src/librustc_lint/levels.rs

@@ -377,10 +377,10 @@ impl<'s> LintLevelsBuilder<'s> {
         let prev = self.cur;
         if !specs.is_empty() {
             self.cur = self.sets.list.len() as u32;
-            self.sets.list.push(LintSet::Node { specs: specs, parent: prev });
+            self.sets.list.push(LintSet::Node { specs, parent: prev });
         }
 
-        BuilderPush { prev: prev, changed: prev != self.cur }
+        BuilderPush { prev, changed: prev != self.cur }
     }
 
     /// Called after `push` when the scope of a set of attributes are exited.

src/librustc_metadata/rmeta/encoder.rs

@@ -493,7 +493,7 @@ impl<'tcx> EncodeContext<'tcx> {
             edition: tcx.sess.edition(),
             has_global_allocator: tcx.has_global_allocator(LOCAL_CRATE),
             has_panic_handler: tcx.has_panic_handler(LOCAL_CRATE),
-            has_default_lib_allocator: has_default_lib_allocator,
+            has_default_lib_allocator,
             plugin_registrar_fn: tcx.plugin_registrar_fn(LOCAL_CRATE).map(|id| id.index),
             proc_macro_decls_static: if is_proc_macro {
                 let id = tcx.proc_macro_decls_static(LOCAL_CRATE).unwrap();

src/librustc_mir/borrow_check/diagnostics/mod.rs

@@ -175,7 +175,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                 if self.body.local_decls[local].is_ref_for_guard() =>
             {
                 self.append_place_to_string(
-                    PlaceRef { local: local, projection: &[] },
+                    PlaceRef { local, projection: &[] },
                     buf,
                     autoderef,
                     &including_downcast,

src/librustc_mir/borrow_check/region_infer/values.rs

@@ -140,7 +140,7 @@ impl<N: Idx> LivenessValues<N> {
     /// Each of the regions in num_region_variables will be initialized with an
     /// empty set of points and no causal information.
     crate fn new(elements: Rc<RegionValueElements>) -> Self {
-        Self { points: SparseBitMatrix::new(elements.num_points), elements: elements }
+        Self { points: SparseBitMatrix::new(elements.num_points), elements }
     }
 
     /// Iterate through each region that has a value in this set.