Simplify some redundant field names

compiler/rustc_ast_lowering/src/item.rs

@@ -1421,7 +1421,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
         };
         hir::FnHeader {
             safety: self.lower_safety(h.safety, default_safety),
-            asyncness: asyncness,
+            asyncness,
             constness: self.lower_constness(h.constness),
             abi: self.lower_extern(h.ext),
         }

compiler/rustc_ast_passes/src/ast_validation.rs

@@ -562,10 +562,8 @@ impl<'a> AstValidator<'a> {
         FnHeader { safety: _, coroutine_kind, constness, ext }: FnHeader,
     ) {
         let report_err = |span| {
-            self.dcx().emit_err(errors::FnQualifierInExtern {
+            self.dcx()
-                span: span,
+                .emit_err(errors::FnQualifierInExtern { span, block: self.current_extern_span() });
-                block: self.current_extern_span(),
-            });
         };
         match coroutine_kind {
             Some(knd) => report_err(knd.span()),

compiler/rustc_codegen_ssa/src/back/linker.rs

@@ -1500,7 +1500,7 @@ impl<'a> Linker for L4Bender<'a> {
 
 impl<'a> L4Bender<'a> {
     pub fn new(cmd: Command, sess: &'a Session) -> L4Bender<'a> {
-        L4Bender { cmd, sess: sess, hinted_static: false }
+        L4Bender { cmd, sess, hinted_static: false }
     }
 
     fn hint_static(&mut self) {
@@ -1520,7 +1520,7 @@ pub struct AixLinker<'a> {
 
 impl<'a> AixLinker<'a> {
     pub fn new(cmd: Command, sess: &'a Session) -> AixLinker<'a> {
-        AixLinker { cmd, sess: sess, hinted_static: None }
+        AixLinker { cmd, sess, hinted_static: None }
     }
 
     fn hint_static(&mut self) {

compiler/rustc_hir_analysis/src/check/entry.rs

@@ -216,7 +216,7 @@ fn check_start_fn_ty(tcx: TyCtxt<'_>, start_def_id: DefId) {
                     }
                     if sig.header.asyncness.is_async() {
                         let span = tcx.def_span(it.owner_id);
-                        tcx.dcx().emit_err(errors::StartAsync { span: span });
+                        tcx.dcx().emit_err(errors::StartAsync { span });
                         error = true;
                     }
 

compiler/rustc_hir_typeck/src/method/suggest.rs

@@ -527,7 +527,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 {
                     if self.check_and_add_sugg_binding(LetStmt {
                         ty_hir_id_opt: if let Some(ty) = ty { Some(ty.hir_id) } else { None },
-                        binding_id: binding_id,
+                        binding_id,
                         span: pat.span,
                         init_hir_id: init.hir_id,
                     }) {

compiler/rustc_incremental/src/persist/fs.rs

@@ -851,7 +851,7 @@ fn delete_old(sess: &Session, path: &Path) {
     debug!("garbage_collect_session_directories() - deleting `{}`", path.display());
 
     if let Err(err) = safe_remove_dir_all(path) {
-        sess.dcx().emit_warn(errors::SessionGcFailed { path: path, err });
+        sess.dcx().emit_warn(errors::SessionGcFailed { path, err });
     } else {
         delete_session_dir_lock_file(sess, &lock_file_path(path));
     }

compiler/rustc_metadata/src/locator.rs

@@ -1002,11 +1002,7 @@ impl CrateError {
                 if !locator.crate_rejections.via_filename.is_empty() {
                     let mismatches = locator.crate_rejections.via_filename.iter();
                     for CrateMismatch { path, .. } in mismatches {
-                        dcx.emit_err(errors::CrateLocationUnknownType {
+                        dcx.emit_err(errors::CrateLocationUnknownType { span, path, crate_name });
-                            span,
-                            path: path,
-                            crate_name,
-                        });
                         dcx.emit_err(errors::LibFilenameForm {
                             span,
                             dll_prefix: &locator.dll_prefix,
@@ -1035,7 +1031,7 @@ impl CrateError {
                     }
                     dcx.emit_err(errors::NewerCrateVersion {
                         span,
-                        crate_name: crate_name,
+                        crate_name,
                         add_info,
                         found_crates,
                     });

compiler/rustc_mir_build/src/thir/cx/expr.rs

@@ -218,12 +218,7 @@ impl<'tcx> Cx<'tcx> {
                     let lhs =
                         self.thir.exprs.push(Expr { temp_lifetime, ty: discr_ty, span, kind });
                     let bin = ExprKind::Binary { op: BinOp::Add, lhs, rhs: offset };
-                    self.thir.exprs.push(Expr {
+                    self.thir.exprs.push(Expr { temp_lifetime, ty: discr_ty, span, kind: bin })
-                        temp_lifetime,
-                        ty: discr_ty,
-                        span: span,
-                        kind: bin,
-                    })
                 }
                 None => offset,
             };

compiler/rustc_mir_build/src/thir/pattern/const_to_pat.rs

@@ -129,7 +129,7 @@ impl<'tcx> ConstToPat<'tcx> {
                 let err = TypeNotPartialEq { span: self.span, non_peq_ty: ty };
                 let e = self.tcx().dcx().emit_err(err);
                 let kind = PatKind::Error(e);
-                return Box::new(Pat { span: self.span, ty: ty, kind });
+                return Box::new(Pat { span: self.span, ty, kind });
             }
         }
 

compiler/rustc_mir_transform/src/coroutine.rs

@@ -931,7 +931,7 @@ fn compute_storage_conflicts<'mir, 'tcx>(
     // Compute the storage conflicts for all eligible locals.
     let mut visitor = StorageConflictVisitor {
         body,
-        saved_locals: saved_locals,
+        saved_locals,
         local_conflicts: BitMatrix::from_row_n(&ineligible_locals, body.local_decls.len()),
         eligible_storage_live: BitSet::new_empty(body.local_decls.len()),
     };

compiler/rustc_mir_transform/src/dataflow_const_prop.rs

@@ -338,7 +338,7 @@ impl<'a, 'tcx> ConstAnalysis<'a, 'tcx> {
             tcx,
             local_decls: &body.local_decls,
             ecx: InterpCx::new(tcx, DUMMY_SP, param_env, DummyMachine),
-            param_env: param_env,
+            param_env,
         }
     }
 

compiler/rustc_query_impl/src/lib.rs

@@ -214,7 +214,7 @@ pub fn query_system<'tcx>(
             local_providers,
             extern_providers,
             encode_query_results: encode_all_query_results,
-            try_mark_green: try_mark_green,
+            try_mark_green,
         },
         jobs: AtomicU64::new(1),
     }

compiler/rustc_resolve/src/diagnostics.rs

@@ -1456,7 +1456,7 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> {
             let label_span = ident.span.shrink_to_hi();
             let mut spans = MultiSpan::from_span(label_span);
             spans.push_span_label(label_span, "put a macro name here");
-            err.subdiagnostic(MaybeMissingMacroRulesName { spans: spans });
+            err.subdiagnostic(MaybeMissingMacroRulesName { spans });
             return;
         }
 

compiler/rustc_sanitizers/src/cfi/typeid/itanium_cxx_abi/transform.rs

@@ -316,7 +316,7 @@ pub fn transform_instance<'tcx>(
             .drop_trait()
             .unwrap_or_else(|| bug!("typeid_for_instance: couldn't get drop_trait lang item"));
         let predicate = ty::ExistentialPredicate::Trait(ty::ExistentialTraitRef {
-            def_id: def_id,
+            def_id,
             args: List::empty(),
         });
         let predicates = tcx.mk_poly_existential_predicates(&[ty::Binder::dummy(predicate)]);

compiler/rustc_smir/src/rustc_smir/alloc.rs

@@ -132,7 +132,7 @@ pub(super) fn allocation_filter<'tcx>(
         ));
     }
     Allocation {
-        bytes: bytes,
+        bytes,
         provenance: ProvenanceMap { ptrs },
         align: alloc.align.bytes(),
         mutability: alloc.mutability.stable(tables),

compiler/rustc_trait_selection/src/traits/auto_trait.rs

@@ -770,7 +770,7 @@ impl<'tcx> AutoTraitFinder<'tcx> {
                                     let reported =
                                         tcx.dcx().emit_err(UnableToConstructConstantValue {
                                             span: tcx.def_span(unevaluated.def),
-                                            unevaluated: unevaluated,
+                                            unevaluated,
                                         });
                                     Err(ErrorHandled::Reported(reported.into(), tcx.def_span(unevaluated.def)))
                                 }