Auto merge of #43710 - zackmdavis:field_init_shorthand_power_slam, r=Mark-Simulacrum

use field init shorthand EVERYWHERE

Like #43008 (f668999), but [(lacking reasons to be more timid)](https://github.com/rust-lang/rust/pull/43008#issuecomment-312463564) _much more aggressive_.

r? @Mark-Simulacrum

src/bootstrap/builder.rs

@@ -193,7 +193,7 @@ pub struct ShouldRun<'a> {
 impl<'a> ShouldRun<'a> {
     fn new(builder: &'a Builder) -> ShouldRun<'a> {
         ShouldRun {
-            builder: builder,
+            builder,
             paths: BTreeSet::new(),
             is_really_default: true, // by default no additional conditions
         }
@@ -278,9 +278,9 @@ impl<'a> Builder<'a> {
         };
 
         let builder = Builder {
-            build: build,
+            build,
             top_stage: build.config.stage.unwrap_or(2),
-            kind: kind,
+            kind,
             cache: Cache::new(),
             stack: RefCell::new(Vec::new()),
         };
@@ -309,9 +309,9 @@ impl<'a> Builder<'a> {
         };
 
         let builder = Builder {
-            build: build,
+            build,
             top_stage: build.config.stage.unwrap_or(2),
-            kind: kind,
+            kind,
             cache: Cache::new(),
             stack: RefCell::new(Vec::new()),
         };

src/bootstrap/check.rs

@@ -872,7 +872,7 @@ impl Step for CrateLibrustc {
             builder.ensure(CrateLibrustc {
                 compiler,
                 target: run.target,
-                test_kind: test_kind,
+                test_kind,
                 krate: name,
             });
         };
@@ -934,8 +934,8 @@ impl Step for Crate {
             builder.ensure(Crate {
                 compiler,
                 target: run.target,
-                mode: mode,
+                mode,
-                test_kind: test_kind,
+                test_kind,
                 krate: name,
             });
         };

src/bootstrap/compile.rs

@@ -74,13 +74,13 @@ impl Step for Std {
             let from = builder.compiler(1, build.build);
             builder.ensure(Std {
                 compiler: from,
-                target: target,
+                target,
             });
             println!("Uplifting stage1 std ({} -> {})", from.host, target);
             builder.ensure(StdLink {
                 compiler: from,
                 target_compiler: compiler,
-                target: target,
+                target,
             });
             return;
         }
@@ -100,7 +100,7 @@ impl Step for Std {
         builder.ensure(StdLink {
             compiler: builder.compiler(compiler.stage, build.build),
             target_compiler: compiler,
-            target: target,
+            target,
         });
     }
 }
@@ -202,7 +202,7 @@ impl Step for StdLink {
 
         builder.ensure(tool::CleanTools {
             compiler: target_compiler,
-            target: target,
+            target,
             mode: Mode::Libstd,
         });
     }
@@ -326,13 +326,13 @@ impl Step for Test {
         if build.force_use_stage1(compiler, target) {
             builder.ensure(Test {
                 compiler: builder.compiler(1, build.build),
-                target: target,
+                target,
             });
             println!("Uplifting stage1 test ({} -> {})", &build.build, target);
             builder.ensure(TestLink {
                 compiler: builder.compiler(1, build.build),
                 target_compiler: compiler,
-                target: target,
+                target,
             });
             return;
         }
@@ -351,7 +351,7 @@ impl Step for Test {
         builder.ensure(TestLink {
             compiler: builder.compiler(compiler.stage, build.build),
             target_compiler: compiler,
-            target: target,
+            target,
         });
     }
 }
@@ -398,7 +398,7 @@ impl Step for TestLink {
                     &libtest_stamp(build, compiler, target));
         builder.ensure(tool::CleanTools {
             compiler: target_compiler,
-            target: target,
+            target,
             mode: Mode::Libtest,
         });
     }
@@ -445,7 +445,7 @@ impl Step for Rustc {
         if build.force_use_stage1(compiler, target) {
             builder.ensure(Rustc {
                 compiler: builder.compiler(1, build.build),
-                target: target,
+                target,
             });
             println!("Uplifting stage1 rustc ({} -> {})", &build.build, target);
             builder.ensure(RustcLink {
@@ -581,7 +581,7 @@ impl Step for RustcLink {
                        &librustc_stamp(build, compiler, target));
         builder.ensure(tool::CleanTools {
             compiler: target_compiler,
-            target: target,
+            target,
             mode: Mode::Librustc,
         });
     }

src/bootstrap/doc.rs

@@ -213,13 +213,13 @@ impl Step for TheBook {
         let name = self.name;
         // build book first edition
         builder.ensure(Rustbook {
-            target: target,
+            target,
             name: INTERNER.intern_string(format!("{}/first-edition", name)),
         });
 
         // build book second edition
         builder.ensure(Rustbook {
-            target: target,
+            target,
             name: INTERNER.intern_string(format!("{}/second-edition", name)),
         });
 

src/bootstrap/flags.rs

@@ -274,14 +274,14 @@ Arguments:
             }
             "test" => {
                 Subcommand::Test {
-                    paths: paths,
+                    paths,
                     test_args: matches.opt_strs("test-args"),
                     fail_fast: !matches.opt_present("no-fail-fast"),
                 }
             }
             "bench" => {
                 Subcommand::Bench {
-                    paths: paths,
+                    paths,
                     test_args: matches.opt_strs("test-args"),
                 }
             }
@@ -297,12 +297,12 @@ Arguments:
             }
             "dist" => {
                 Subcommand::Dist {
-                    paths: paths,
+                    paths,
                 }
             }
             "install" => {
                 Subcommand::Install {
-                    paths: paths,
+                    paths,
                 }
             }
             _ => {
@@ -324,7 +324,7 @@ Arguments:
 
         Flags {
             verbose: matches.opt_count("verbose"),
-            stage: stage,
+            stage,
             on_fail: matches.opt_str("on-fail"),
             keep_stage: matches.opt_str("keep-stage").map(|j| j.parse().unwrap()),
             build: matches.opt_str("build").map(|s| INTERNER.intern_string(s)),
@@ -333,9 +333,9 @@ Arguments:
             target: split(matches.opt_strs("target"))
                 .into_iter().map(|x| INTERNER.intern_string(x)).collect::<Vec<_>>(),
             config: cfg_file,
-            src: src,
+            src,
             jobs: matches.opt_str("jobs").map(|j| j.parse().unwrap()),
-            cmd: cmd,
+            cmd,
             incremental: matches.opt_present("incremental"),
         }
     }

src/bootstrap/lib.rs

@@ -314,19 +314,19 @@ impl Build {
             hosts: config.hosts.clone(),
             targets: config.targets.clone(),
 
-            config: config,
+            config,
-            src: src,
+            src,
-            out: out,
+            out,
 
-            rust_info: rust_info,
+            rust_info,
-            cargo_info: cargo_info,
+            cargo_info,
-            rls_info: rls_info,
+            rls_info,
             cc: HashMap::new(),
             cxx: HashMap::new(),
             crates: HashMap::new(),
             lldb_version: None,
             lldb_python_dir: None,
-            is_sudo: is_sudo,
+            is_sudo,
             ci_env: CiEnv::current(),
             delayed_failures: Cell::new(0),
         }

src/bootstrap/metadata.rs

@@ -75,10 +75,10 @@ fn build_krate(build: &mut Build, krate: &str) {
                 doc_step: format!("doc-crate-{}", name),
                 test_step: format!("test-crate-{}", name),
                 bench_step: format!("bench-crate-{}", name),
-                name: name,
+                name,
                 version: package.version,
                 deps: Vec::new(),
-                path: path,
+                path,
             });
         }
     }

src/liballoc/arc.rs

@@ -278,7 +278,7 @@ impl<T> Arc<T> {
         let x: Box<_> = box ArcInner {
             strong: atomic::AtomicUsize::new(1),
             weak: atomic::AtomicUsize::new(1),
-            data: data,
+            data,
         };
         Arc { ptr: Shared::from(Box::into_unique(x)) }
     }

src/liballoc/binary_heap.rs

@@ -853,9 +853,9 @@ impl<'a, T> Hole<'a, T> {
         debug_assert!(pos < data.len());
         let elt = ptr::read(&data[pos]);
         Hole {
-            data: data,
+            data,
             elt: Some(elt),
-            pos: pos,
+            pos,
         }
     }
 
@@ -1203,7 +1203,7 @@ where T: Clone + Ord {
         let place = Placer::make_place(self.data.place_back());
         BinaryHeapPlace {
             heap: ptr,
-            place: place,
+            place,
         }
     }
 }

src/liballoc/boxed.rs

@@ -169,7 +169,7 @@ fn make_place<T>() -> IntermediateBox<T> {
 
     IntermediateBox {
         ptr: p,
-        layout: layout,
+        layout,
         marker: marker::PhantomData,
     }
 }

src/liballoc/btree/map.rs

@@ -234,7 +234,7 @@ impl<K, Q: ?Sized> super::Recover<Q> for BTreeMap<K, ()>
         match search::search_tree(self.root.as_mut(), key) {
             Found(handle) => {
                 Some(OccupiedEntry {
-                         handle: handle,
+                         handle,
                          length: &mut self.length,
                          _marker: PhantomData,
                      }
@@ -250,8 +250,8 @@ impl<K, Q: ?Sized> super::Recover<Q> for BTreeMap<K, ()>
             Found(handle) => Some(mem::replace(handle.into_kv_mut().0, key)),
             GoDown(handle) => {
                 VacantEntry {
-                    key: key,
+                    key,
-                    handle: handle,
+                    handle,
                     length: &mut self.length,
                     _marker: PhantomData,
                 }
@@ -695,7 +695,7 @@ impl<K: Ord, V> BTreeMap<K, V> {
         match search::search_tree(self.root.as_mut(), key) {
             Found(handle) => {
                 Some(OccupiedEntry {
-                         handle: handle,
+                         handle,
                          length: &mut self.length,
                          _marker: PhantomData,
                      }
@@ -866,15 +866,15 @@ impl<K: Ord, V> BTreeMap<K, V> {
         match search::search_tree(self.root.as_mut(), &key) {
             Found(handle) => {
                 Occupied(OccupiedEntry {
-                    handle: handle,
+                    handle,
                     length: &mut self.length,
                     _marker: PhantomData,
                 })
             }
             GoDown(handle) => {
                 Vacant(VacantEntry {
-                    key: key,
+                    key,
-                    handle: handle,
+                    handle,
                     length: &mut self.length,
                     _marker: PhantomData,
                 })

src/liballoc/btree/node.rs

@@ -776,8 +776,8 @@ impl<BorrowType, K, V, NodeType> Handle<NodeRef<BorrowType, K, V, NodeType>, mar
         debug_assert!(idx < node.len());
 
         Handle {
-            node: node,
+            node,
-            idx: idx,
+            idx,
             _marker: PhantomData
         }
     }
@@ -850,8 +850,8 @@ impl<BorrowType, K, V, NodeType>
         debug_assert!(idx <= node.len());
 
         Handle {
-            node: node,
+            node,
-            idx: idx,
+            idx,
             _marker: PhantomData
         }
     }
@@ -1149,7 +1149,7 @@ impl<'a, K, V> Handle<NodeRef<marker::Mut<'a>, K, V, marker::Internal>, marker::
 
             let mut new_root = Root {
                 node: BoxedNode::from_internal(new_node),
-                height: height
+                height,
             };
 
             for i in 0..(new_len+1) {
@@ -1449,12 +1449,12 @@ impl<BorrowType, K, V, HandleType>
     > {
         match self.node.force() {
             ForceResult::Leaf(node) => ForceResult::Leaf(Handle {
-                node: node,
+                node,
                 idx: self.idx,
                 _marker: PhantomData
             }),
             ForceResult::Internal(node) => ForceResult::Internal(Handle {
-                node: node,
+                node,
                 idx: self.idx,
                 _marker: PhantomData
             })

src/liballoc/linked_list.rs

@@ -140,7 +140,7 @@ impl<T> Node<T> {
         Node {
             next: None,
             prev: None,
-            element: element,
+            element,
         }
     }
 
@@ -924,7 +924,7 @@ impl<'a, T> IterMut<'a, T> {
                 let node = Some(Shared::from(Box::into_unique(box Node {
                     next: Some(head),
                     prev: Some(prev),
-                    element: element,
+                    element,
                 })));
 
                 prev.as_mut().next = node;

src/liballoc/raw_vec.rs

@@ -60,8 +60,8 @@ impl<T, A: Alloc> RawVec<T, A> {
         // Unique::empty() doubles as "unallocated" and "zero-sized allocation"
         RawVec {
             ptr: Unique::empty(),
-            cap: cap,
+            cap,
-            a: a,
+            a,
         }
     }
 
@@ -104,8 +104,8 @@ impl<T, A: Alloc> RawVec<T, A> {
 
             RawVec {
                 ptr: Unique::new_unchecked(ptr as *mut _),
-                cap: cap,
+                cap,
-                a: a,
+                a,
             }
         }
     }
@@ -159,8 +159,8 @@ impl<T, A: Alloc> RawVec<T, A> {
     pub unsafe fn from_raw_parts_in(ptr: *mut T, cap: usize, a: A) -> Self {
         RawVec {
             ptr: Unique::new_unchecked(ptr),
-            cap: cap,
+            cap,
-            a: a,
+            a,
         }
     }
 }
@@ -176,7 +176,7 @@ impl<T> RawVec<T, Heap> {
     pub unsafe fn from_raw_parts(ptr: *mut T, cap: usize) -> Self {
         RawVec {
             ptr: Unique::new_unchecked(ptr),
-            cap: cap,
+            cap,
             a: Heap,
         }
     }

src/liballoc/rc.rs

@@ -311,7 +311,7 @@ impl<T> Rc<T> {
             ptr: Shared::from(Box::into_unique(box RcBox {
                 strong: Cell::new(1),
                 weak: Cell::new(1),
-                value: value,
+                value,
             })),
         }
     }

src/liballoc/slice.rs

@@ -1886,7 +1886,7 @@ fn merge_sort<T, F>(v: &mut [T], mut is_less: F)
 
         // Push this run onto the stack.
         runs.push(Run {
-            start: start,
+            start,
             len: end - start,
         });
         end = start;

src/liballoc/string.rs

@@ -1378,8 +1378,8 @@ impl String {
         let chars_iter = self[start..end].chars();
 
         Drain {
-            start: start,
+            start,
-            end: end,
+            end,
             iter: chars_iter,
             string: self_ptr,
         }
@@ -1442,11 +1442,11 @@ impl String {
         let chars_iter = self[start..end].chars();
 
         Splice {
-            start: start,
+            start,
-            end: end,
+            end,
             iter: chars_iter,
             string: self_ptr,
-            replace_with: replace_with
+            replace_with,
         }
     }
 

src/liballoc/vec.rs

@@ -1728,9 +1728,9 @@ impl<T> IntoIterator for Vec<T> {
             mem::forget(self);
             IntoIter {
                 buf: Shared::new_unchecked(begin),
-                cap: cap,
+                cap,
                 ptr: begin,
-                end: end,
+                end,
             }
         }
     }

src/liballoc/vec_deque.rs

@@ -2442,7 +2442,7 @@ impl<T> From<Vec<T>> for VecDeque<T> {
             VecDeque {
                 tail: 0,
                 head: len,
-                buf: buf,
+                buf,
             }
         }
     }

src/libcore/fmt/builders.rs

@@ -18,7 +18,7 @@ struct PadAdapter<'a, 'b: 'a> {
 impl<'a, 'b: 'a> PadAdapter<'a, 'b> {
     fn new(fmt: &'a mut fmt::Formatter<'b>) -> PadAdapter<'a, 'b> {
         PadAdapter {
-            fmt: fmt,
+            fmt,
             on_newline: false,
         }
     }
@@ -94,8 +94,8 @@ pub fn debug_struct_new<'a, 'b>(fmt: &'a mut fmt::Formatter<'b>,
                                 -> DebugStruct<'a, 'b> {
     let result = fmt.write_str(name);
     DebugStruct {
-        fmt: fmt,
+        fmt,
-        result: result,
+        result,
         has_fields: false,
     }
 }
@@ -185,8 +185,8 @@ pub struct DebugTuple<'a, 'b: 'a> {
 pub fn debug_tuple_new<'a, 'b>(fmt: &'a mut fmt::Formatter<'b>, name: &str) -> DebugTuple<'a, 'b> {
     let result = fmt.write_str(name);
     DebugTuple {
-        fmt: fmt,
+        fmt,
-        result: result,
+        result,
         fields: 0,
         empty_name: name.is_empty(),
     }
@@ -317,8 +317,8 @@ pub fn debug_set_new<'a, 'b>(fmt: &'a mut fmt::Formatter<'b>) -> DebugSet<'a, 'b
     let result = write!(fmt, "{{");
     DebugSet {
         inner: DebugInner {
-            fmt: fmt,
+            fmt,
-            result: result,
+            result,
             has_fields: false,
         },
     }
@@ -388,8 +388,8 @@ pub fn debug_list_new<'a, 'b>(fmt: &'a mut fmt::Formatter<'b>) -> DebugList<'a,
     let result = write!(fmt, "[");
     DebugList {
         inner: DebugInner {
-            fmt: fmt,
+            fmt,
-            result: result,
+            result,
             has_fields: false,
         },
     }
@@ -460,8 +460,8 @@ pub struct DebugMap<'a, 'b: 'a> {
 pub fn debug_map_new<'a, 'b>(fmt: &'a mut fmt::Formatter<'b>) -> DebugMap<'a, 'b> {
     let result = write!(fmt, "{{");
     DebugMap {
-        fmt: fmt,
+        fmt,
-        result: result,
+        result,
         has_fields: false,
     }
 }

src/libcore/fmt/mod.rs

@@ -334,9 +334,9 @@ impl<'a> Arguments<'a> {
     pub fn new_v1(pieces: &'a [&'a str],
                   args: &'a [ArgumentV1<'a>]) -> Arguments<'a> {
         Arguments {
-            pieces: pieces,
+            pieces,
             fmt: None,
-            args: args
+            args,
         }
     }
 
@@ -353,9 +353,9 @@ impl<'a> Arguments<'a> {
                             args: &'a [ArgumentV1<'a>],
                             fmt: &'a [rt::v1::Argument]) -> Arguments<'a> {
         Arguments {
-            pieces: pieces,
+            pieces,
             fmt: Some(fmt),
-            args: args
+            args,
         }
     }
 

src/libcore/iter/mod.rs

@@ -840,8 +840,8 @@ impl<A, B> ZipImpl<A, B> for Zip<A, B>
     type Item = (A::Item, B::Item);
     default fn new(a: A, b: B) -> Self {
         Zip {
-            a: a,
+            a,
-            b: b,
+            b,
             index: 0, // unused
             len: 0, // unused
         }
@@ -903,10 +903,10 @@ impl<A, B> ZipImpl<A, B> for Zip<A, B>
     fn new(a: A, b: B) -> Self {
         let len = cmp::min(a.len(), b.len());
         Zip {
-            a: a,
+            a,
-            b: b,
+            b,
             index: 0,
-            len: len,
+            len,
         }
     }
 

src/libcore/iter/traits.rs

@@ -744,7 +744,7 @@ impl<I, T, E> ResultShunt<I, E>
 
     fn new(iter: I) -> Self {
         ResultShunt {
-            iter: iter,
+            iter,
             error: None,
         }
     }

src/libcore/num/diy_float.rs

@@ -86,7 +86,7 @@ impl Fp {
         assert_eq!(self.f << edelta >> edelta, self.f);
         Fp {
             f: self.f << edelta,
-            e: e,
+            e,
         }
     }
 }

src/libcore/num/flt2dec/mod.rs

@@ -442,7 +442,7 @@ pub fn to_shortest_str<'a, T, F>(mut format_shortest: F, v: T,
         }
         FullDecoded::Finite(ref decoded) => {
             let (len, exp) = format_shortest(decoded, buf);
-            Formatted { sign: sign,
+            Formatted { sign,
                         parts: digits_to_dec_str(&buf[..len], exp, frac_digits, parts) }
         }
     }
@@ -581,7 +581,7 @@ pub fn to_exact_exp_str<'a, T, F>(mut format_exact: F, v: T,
 
             let trunc = if ndigits < maxlen { ndigits } else { maxlen };
             let (len, exp) = format_exact(decoded, &mut buf[..trunc], i16::MIN);
-            Formatted { sign: sign,
+            Formatted { sign,
                         parts: digits_to_exp_str(&buf[..len], exp, ndigits, upper, parts) }
         }
     }
@@ -652,7 +652,7 @@ pub fn to_exact_fixed_str<'a, T, F>(mut format_exact: F, v: T,
                     Formatted { sign: sign, parts: &parts[..1] }
                 }
             } else {
-                Formatted { sign: sign,
+                Formatted { sign,
                             parts: digits_to_dec_str(&buf[..len], exp, frac_digits, parts) }
             }
         }

src/libcore/slice/mod.rs

@@ -300,7 +300,7 @@ impl<T> SliceExt for [T] {
     {
         Split {
             v: self,
-            pred: pred,
+            pred,
             finished: false
         }
     }

src/libcore/str/mod.rs

@@ -2233,7 +2233,7 @@ impl StrExt for str {
     fn splitn<'a, P: Pattern<'a>>(&'a self, count: usize, pat: P) -> SplitN<'a, P> {
         SplitN(SplitNInternal {
             iter: self.split(pat).0,
-            count: count,
+            count,
         })
     }
 

src/libcore/str/pattern.rs

@@ -290,7 +290,7 @@ impl<'a, C: CharEq> Pattern<'a> for CharEqPattern<C> {
     fn into_searcher(self, haystack: &'a str) -> CharEqSearcher<'a, C> {
         CharEqSearcher {
             ascii_only: self.0.only_ascii(),
-            haystack: haystack,
+            haystack,
             char_eq: self.0,
             char_indices: haystack.char_indices(),
         }
@@ -596,8 +596,8 @@ impl<'a, 'b> StrSearcher<'a, 'b> {
     fn new(haystack: &'a str, needle: &'b str) -> StrSearcher<'a, 'b> {
         if needle.is_empty() {
             StrSearcher {
-                haystack: haystack,
+                haystack,
-                needle: needle,
+                needle,
                 searcher: StrSearcherImpl::Empty(EmptyNeedle {
                     position: 0,
                     end: haystack.len(),
@@ -607,8 +607,8 @@ impl<'a, 'b> StrSearcher<'a, 'b> {
             }
         } else {
             StrSearcher {
-                haystack: haystack,
+                haystack,
-                needle: needle,
+                needle,
                 searcher: StrSearcherImpl::TwoWay(
                     TwoWaySearcher::new(needle.as_bytes(), haystack.len())
                 ),
@@ -899,13 +899,13 @@ impl TwoWaySearcher {
                 TwoWaySearcher::reverse_maximal_suffix(needle, period, true));
 
             TwoWaySearcher {
-                crit_pos: crit_pos,
+                crit_pos,
-                crit_pos_back: crit_pos_back,
+                crit_pos_back,
-                period: period,
+                period,
                 byteset: Self::byteset_create(&needle[..period]),
 
                 position: 0,
-                end: end,
+                end,
                 memory: 0,
                 memory_back: needle.len(),
             }
@@ -918,13 +918,13 @@ impl TwoWaySearcher {
             // reverse search.
 
             TwoWaySearcher {
-                crit_pos: crit_pos,
+                crit_pos,
                 crit_pos_back: crit_pos,
                 period: cmp::max(crit_pos, needle.len() - crit_pos) + 1,
                 byteset: Self::byteset_create(needle),
 
                 position: 0,
-                end: end,
+                end,
                 memory: usize::MAX, // Dummy value to signify that the period is long
                 memory_back: usize::MAX,
             }

src/libcore/tests/iter.rs

@@ -392,7 +392,7 @@ pub struct CycleIter<'a, T: 'a> {
 pub fn cycle<T>(data: &[T]) -> CycleIter<T> {
     CycleIter {
         index: 0,
-        data: data,
+        data,
     }
 }
 

src/libcore/tests/option.rs

@@ -53,7 +53,7 @@ fn test_get_resource() {
 
     fn r(i: Rc<RefCell<isize>>) -> R {
         R {
-            i: i
+            i,
         }
     }
 

src/libfmt_macros/lib.rs

@@ -284,7 +284,7 @@ impl<'a> Parser<'a> {
 
         Argument {
             position: pos,
-            format: format,
+            format,
         }
     }
 

src/libgetopts/lib.rs

@@ -250,28 +250,28 @@ impl OptGroup {
             (0, _) => {
                 Opt {
                     name: Long((long_name)),
-                    hasarg: hasarg,
+                    hasarg,
-                    occur: occur,
+                    occur,
                     aliases: Vec::new(),
                 }
             }
             (1, 0) => {
                 Opt {
                     name: Short(short_name.chars().next().unwrap()),
-                    hasarg: hasarg,
+                    hasarg,
-                    occur: occur,
+                    occur,
                     aliases: Vec::new(),
                 }
             }
             (1, _) => {
                 Opt {
                     name: Long((long_name)),
-                    hasarg: hasarg,
+                    hasarg,
-                    occur: occur,
+                    occur,
                     aliases: vec![Opt {
                                       name: Short(short_name.chars().next().unwrap()),
-                                      hasarg: hasarg,
+                                      hasarg,
-                                      occur: occur,
+                                      occur,
                                       aliases: Vec::new(),
                                   }],
                 }
@@ -530,8 +530,8 @@ pub fn opt(short_name: &str,
         long_name: long_name.to_owned(),
         hint: hint.to_owned(),
         desc: desc.to_owned(),
-        hasarg: hasarg,
+        hasarg,
-        occur: occur,
+        occur,
     }
 }
 
@@ -681,9 +681,9 @@ pub fn getopts(args: &[String], optgrps: &[OptGroup]) -> Result {
         }
     }
     Ok(Matches {
-        opts: opts,
+        opts,
-        vals: vals,
+        vals,
-        free: free,
+        free,
     })
 }
 

src/libgraphviz/lib.rs

@@ -781,10 +781,10 @@ mod tests {
 
     fn edge(from: usize, to: usize, label: &'static str, style: Style) -> Edge {
         Edge {
-            from: from,
+            from,
-            to: to,
+            to,
-            label: label,
+            label,
-            style: style,
+            style,
         }
     }
 
@@ -848,9 +848,9 @@ mod tests {
                -> LabelledGraph {
             let count = node_labels.len();
             LabelledGraph {
-                name: name,
+                name,
                 node_labels: node_labels.to_opt_strs(),
-                edges: edges,
+                edges,
                 node_styles: match node_styles {
                     Some(nodes) => nodes,
                     None => vec![Style::None; count],

src/libpanic_unwind/gcc.rs

@@ -74,7 +74,7 @@ pub unsafe fn panic(data: Box<Any + Send>) -> u32 {
     let exception = Box::new(Exception {
         _uwe: uw::_Unwind_Exception {
             exception_class: rust_exception_class(),
-            exception_cleanup: exception_cleanup,
+            exception_cleanup,
             private: [0; uw::unwinder_private_data_size],
         },
         cause: Some(data),

src/librand/distributions/gamma.rs

@@ -127,9 +127,9 @@ impl GammaLargeShape {
     fn new_raw(shape: f64, scale: f64) -> GammaLargeShape {
         let d = shape - 1. / 3.;
         GammaLargeShape {
-            scale: scale,
+            scale,
             c: 1. / (9. * d).sqrt(),
-            d: d,
+            d,
         }
     }
 }

src/librand/distributions/mod.rs

@@ -149,7 +149,7 @@ impl<'a, T: Clone> WeightedChoice<'a, T> {
                 "WeightedChoice::new called with a total weight of 0");
 
         WeightedChoice {
-            items: items,
+            items,
             // we're likely to be generating numbers in this range
             // relatively often, so might as well cache it
             weight_range: Range::new(0, running_total),

src/librand/distributions/normal.rs

@@ -103,8 +103,8 @@ impl Normal {
     pub fn new(mean: f64, std_dev: f64) -> Normal {
         assert!(std_dev >= 0.0, "Normal::new called with `std_dev` < 0");
         Normal {
-            mean: mean,
+            mean,
-            std_dev: std_dev,
+            std_dev,
         }
     }
 }

src/librand/distributions/range.rs

@@ -104,7 +104,7 @@ macro_rules! integer_impl {
                 let zone = unsigned_max - unsigned_max % range;
 
                 Range {
-                    low: low,
+                    low,
                     range: range as $ty,
                     accept_zone: zone as $ty
                 }
@@ -143,7 +143,7 @@ macro_rules! float_impl {
         impl SampleRange for $ty {
             fn construct_range(low: $ty, high: $ty) -> Range<$ty> {
                 Range {
-                    low: low,
+                    low,
                     range: high - low,
                     accept_zone: 0.0 // unused
                 }

src/librand/lib.rs

@@ -418,10 +418,10 @@ impl Rand for XorShiftRng {
         }
         let (x, y, z, w) = tuple;
         XorShiftRng {
-            x: x,
+            x,
-            y: y,
+            y,
-            z: z,
+            z,
-            w: w,
+            w,
         }
     }
 }

src/librand/reseeding.rs

@@ -38,10 +38,10 @@ impl<R: Rng, Rsdr: Reseeder<R>> ReseedingRng<R, Rsdr> {
     /// * `reseeder`: the reseeding object to use.
     pub fn new(rng: R, generation_threshold: usize, reseeder: Rsdr) -> ReseedingRng<R, Rsdr> {
         ReseedingRng {
-            rng: rng,
+            rng,
-            generation_threshold: generation_threshold,
+            generation_threshold,
             bytes_generated: 0,
-            reseeder: reseeder,
+            reseeder,
         }
     }
 

src/librustc/middle/dead.rs

@@ -630,8 +630,8 @@ pub fn check_crate<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) {
     let krate = tcx.hir.krate();
     let live_symbols = find_live(tcx, access_levels, krate);
     let mut visitor = DeadVisitor {
-        tcx: tcx,
+        tcx,
-        live_symbols: live_symbols,
+        live_symbols,
     };
     intravisit::walk_crate(&mut visitor, krate);
 }

src/librustc/ty/context.rs

@@ -1695,8 +1695,8 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
                          substs: &'tcx Substs<'tcx>)
         -> Ty<'tcx> {
             self.mk_ty(TyProjection(ProjectionTy {
-                item_def_id: item_def_id,
+                item_def_id,
-                substs: substs,
+                substs,
             }))
         }
 

src/librustc/ty/relate.rs

@@ -253,7 +253,7 @@ impl<'tcx> Relate<'tcx> for ty::ExistentialProjection<'tcx> {
             let substs = relation.relate(&a.substs, &b.substs)?;
             Ok(ty::ExistentialProjection {
                 item_def_id: a.item_def_id,
-                substs: substs,
+                substs,
                 ty,
             })
         }

src/librustc/ty/structural_impls.rs

@@ -137,7 +137,7 @@ impl<'a, 'tcx> Lift<'tcx> for ty::ProjectionTy<'a> {
         tcx.lift(&self.substs).map(|substs| {
             ty::ProjectionTy {
                 item_def_id: self.item_def_id,
-                substs: substs,
+                substs,
             }
         })
     }

src/librustc/ty/sty.rs

@@ -569,7 +569,7 @@ impl<'a, 'tcx> ProjectionTy<'tcx> {
     pub fn trait_ref(&self, tcx: TyCtxt) -> ty::TraitRef<'tcx> {
         let def_id = tcx.associated_item(self.item_def_id).container.id();
         ty::TraitRef {
-            def_id: def_id,
+            def_id,
             substs: self.substs,
         }
     }
@@ -874,7 +874,7 @@ impl<'a, 'tcx, 'gcx> ExistentialProjection<'tcx> {
     pub fn trait_ref(&self, tcx: TyCtxt) -> ty::ExistentialTraitRef<'tcx> {
         let def_id = tcx.associated_item(self.item_def_id).container.id();
         ty::ExistentialTraitRef{
-            def_id: def_id,
+            def_id,
             substs: self.substs,
         }
     }

src/librustc_allocator/expand.rs

@@ -36,9 +36,9 @@ pub fn modify(sess: &ParseSess,
               krate: Crate,
               handler: &rustc_errors::Handler) -> ast::Crate {
     ExpandAllocatorDirectives {
-        handler: handler,
+        handler,
-        sess: sess,
+        sess,
-        resolver: resolver,
+        resolver,
         found: false,
     }.fold_crate(krate)
 }
@@ -88,7 +88,7 @@ impl<'a> Folder for ExpandAllocatorDirectives<'a> {
         };
         let ecfg = ExpansionConfig::default(name.to_string());
         let mut f = AllocFnFactory {
-            span: span,
+            span,
             kind: AllocatorKind::Global,
             global: item.ident,
             alloc: Ident::from_str("alloc"),

src/librustc_back/target/apple_ios_base.rs

@@ -97,7 +97,7 @@ pub fn opts(arch: Arch) -> Result<TargetOptions, String> {
         cpu: target_cpu(arch),
         dynamic_linking: false,
         executables: true,
-        pre_link_args: pre_link_args,
+        pre_link_args,
         has_elf_tls: false,
         .. super::apple_base::opts()
     })

src/librustc_back/target/l4re_base.rs

@@ -25,7 +25,7 @@ pub fn opts() -> TargetOptions {
         exe_allocation_crate: Some("alloc_system".to_string()),
         panic_strategy: PanicStrategy::Abort,
         linker: "ld".to_string(),
-        pre_link_args: pre_link_args,
+        pre_link_args,
         target_family: Some("unix".to_string()),
         .. Default::default()
     }

src/librustc_back/target/le32_unknown_nacl.rs

@@ -25,8 +25,8 @@ pub fn target() -> TargetResult {
         linker: "pnacl-clang".to_string(),
         ar: "pnacl-ar".to_string(),
 
-        pre_link_args: pre_link_args,
+        pre_link_args,
-        post_link_args: post_link_args,
+        post_link_args,
         dynamic_linking: false,
         executables: true,
         exe_suffix: ".pexe".to_string(),

src/librustc_back/target/wasm32_experimental_emscripten.rs

@@ -38,7 +38,7 @@ pub fn target() -> Result<Target, String> {
         obj_is_bitcode: true,
         is_like_emscripten: true,
         max_atomic_width: Some(32),
-        post_link_args: post_link_args,
+        post_link_args,
         target_family: Some("unix".to_string()),
         .. Default::default()
     };

src/librustc_back/target/wasm32_unknown_emscripten.rs

@@ -34,7 +34,7 @@ pub fn target() -> Result<Target, String> {
         obj_is_bitcode: true,
         is_like_emscripten: true,
         max_atomic_width: Some(32),
-        post_link_args: post_link_args,
+        post_link_args,
         target_family: Some("unix".to_string()),
         .. Default::default()
     };

src/librustc_back/target/windows_base.rs

@@ -78,7 +78,7 @@ pub fn opts() -> TargetOptions {
         target_family: Some("windows".to_string()),
         is_like_windows: true,
         allows_weak_linkage: false,
-        pre_link_args: pre_link_args,
+        pre_link_args,
         pre_link_objects_exe: vec![
             "crt2.o".to_string(),    // mingw C runtime initialization for executables
             "rsbegin.o".to_string(), // Rust compiler runtime initialization, see rsbegin.rs
@@ -87,7 +87,7 @@ pub fn opts() -> TargetOptions {
             "dllcrt2.o".to_string(), // mingw C runtime initialization for dlls
             "rsbegin.o".to_string(),
         ],
-        late_link_args: late_link_args,
+        late_link_args,
         post_link_objects: vec![
             "rsend.o".to_string()
         ],

src/librustc_borrowck/borrowck/check_loans.rs

@@ -194,10 +194,10 @@ pub fn check_loans<'a, 'b, 'c, 'tcx>(bccx: &BorrowckCtxt<'a, 'tcx>,
     let def_id = bccx.tcx.hir.body_owner_def_id(body.id());
     let param_env = bccx.tcx.param_env(def_id);
     let mut clcx = CheckLoanCtxt {
-        bccx: bccx,
+        bccx,
-        dfcx_loans: dfcx_loans,
+        dfcx_loans,
-        move_data: move_data,
+        move_data,
-        all_loans: all_loans,
+        all_loans,
         param_env,
     };
     euv::ExprUseVisitor::new(&mut clcx, bccx.tcx, param_env, &bccx.region_maps, bccx.tables)

src/librustc_borrowck/borrowck/gather_loans/gather_moves.rs

@@ -106,8 +106,8 @@ pub fn gather_move_from_expr<'a, 'tcx>(bccx: &BorrowckCtxt<'a, 'tcx>,
     };
     let move_info = GatherMoveInfo {
         id: move_expr_id,
-        kind: kind,
+        kind,
-        cmt: cmt,
+        cmt,
         span_path_opt: None,
     };
     gather_move(bccx, move_data, move_error_collector, move_info);
@@ -163,7 +163,7 @@ pub fn gather_move_from_pat<'a, 'tcx>(bccx: &BorrowckCtxt<'a, 'tcx>,
     let move_info = GatherMoveInfo {
         id: move_pat.id,
         kind: MovePat,
-        cmt: cmt,
+        cmt,
         span_path_opt: pat_span_path_opt,
     };
 

src/librustc_borrowck/borrowck/gather_loans/lifetime.rs

@@ -37,10 +37,10 @@ pub fn guarantee_lifetime<'a, 'tcx>(bccx: &BorrowckCtxt<'a, 'tcx>,
     debug!("guarantee_lifetime(cmt={:?}, loan_region={:?})",
            cmt, loan_region);
     let ctxt = GuaranteeLifetimeContext {bccx: bccx,
-                                         item_scope: item_scope,
+                                         item_scope,
-                                         span: span,
+                                         span,
-                                         cause: cause,
+                                         cause,
-                                         loan_region: loan_region,
+                                         loan_region,
                                          cmt_original: cmt.clone()};
     ctxt.check(&cmt, None)
 }

src/librustc_borrowck/borrowck/gather_loans/mod.rs

@@ -41,7 +41,7 @@ pub fn gather_loans_in_fn<'a, 'tcx>(bccx: &BorrowckCtxt<'a, 'tcx>,
     let def_id = bccx.tcx.hir.body_owner_def_id(body);
     let param_env = bccx.tcx.param_env(def_id);
     let mut glcx = GatherLoanCtxt {
-        bccx: bccx,
+        bccx,
         all_loans: Vec::new(),
         item_ub: region::CodeExtent::Misc(body.node_id),
         move_data: MoveData::new(),
@@ -230,8 +230,8 @@ fn check_mutability<'a, 'tcx>(bccx: &BorrowckCtxt<'a, 'tcx>,
             // Only mutable data can be lent as mutable.
             if !cmt.mutbl.is_mutable() {
                 Err(bccx.report(BckError { span: borrow_span,
-                                           cause: cause,
+                                           cause,
-                                           cmt: cmt,
+                                           cmt,
                                            code: err_mutbl }))
             } else {
                 Ok(())
@@ -389,13 +389,13 @@ impl<'a, 'tcx> GatherLoanCtxt<'a, 'tcx> {
 
                 Loan {
                     index: self.all_loans.len(),
-                    loan_path: loan_path,
+                    loan_path,
                     kind: req_kind,
-                    gen_scope: gen_scope,
+                    gen_scope,
-                    kill_scope: kill_scope,
+                    kill_scope,
                     span: borrow_span,
-                    restricted_paths: restricted_paths,
+                    restricted_paths,
-                    cause: cause,
+                    cause,
                 }
             }
         };
@@ -423,13 +423,13 @@ impl<'a, 'tcx> GatherLoanCtxt<'a, 'tcx> {
             //    let all_loans = &mut *self.all_loans; // FIXME(#5074)
             //    Loan {
             //        index: all_loans.len(),
-            //        loan_path: loan_path,
+            //        loan_path,
-            //        cmt: cmt,
+            //        cmt,
             //        mutbl: ConstMutability,
             //        gen_scope: borrow_id,
-            //        kill_scope: kill_scope,
+            //        kill_scope,
             //        span: borrow_span,
-            //        restrictions: restrictions
+            //        restrictions,
             //    }
         // }
     }

src/librustc_borrowck/borrowck/gather_loans/move_error.rs

@@ -49,8 +49,8 @@ impl<'tcx> MoveError<'tcx> {
                           move_to: Option<MovePlace<'tcx>>)
                           -> MoveError<'tcx> {
         MoveError {
-            move_from: move_from,
+            move_from,
-            move_to: move_to,
+            move_to,
         }
     }
 }

src/librustc_borrowck/borrowck/gather_loans/restrictions.rs

@@ -34,10 +34,10 @@ pub fn compute_restrictions<'a, 'tcx>(bccx: &BorrowckCtxt<'a, 'tcx>,
                                       loan_region: ty::Region<'tcx>)
                                       -> RestrictionResult<'tcx> {
     let ctxt = RestrictionsContext {
-        bccx: bccx,
+        bccx,
-        span: span,
+        span,
-        cause: cause,
+        cause,
-        loan_region: loan_region,
+        loan_region,
     };
 
     ctxt.restrict(cmt)

src/librustc_borrowck/borrowck/mod.rs

@@ -180,7 +180,7 @@ fn build_borrowck_dataflow_data<'a, 'c, 'tcx, F>(this: &mut BorrowckCtxt<'a, 'tc
                                                       id_range,
                                                       body);
 
-    Some(AnalysisData { all_loans: all_loans,
+    Some(AnalysisData { all_loans,
                         loans: loan_dfcx,
                         move_data:flowed_moves })
 }

src/librustc_borrowck/borrowck/move_data.rs

@@ -310,7 +310,7 @@ impl<'a, 'tcx> MoveData<'tcx> {
                     parent: parent_index,
                     first_move: InvalidMoveIndex,
                     first_child: InvalidMovePathIndex,
-                    next_sibling: next_sibling,
+                    next_sibling,
                 });
 
                 index
@@ -408,9 +408,9 @@ impl<'a, 'tcx> MoveData<'tcx> {
 
         self.moves.borrow_mut().push(Move {
             path: path_index,
-            id: id,
+            id,
-            kind: kind,
+            kind,
-            next_move: next_move
+            next_move,
         });
     }
 
@@ -468,8 +468,8 @@ impl<'a, 'tcx> MoveData<'tcx> {
         let assignment = Assignment {
             path: path_index,
             id: assign_id,
-            span: span,
+            span,
-            assignee_id: assignee_id,
+            assignee_id,
         };
 
         if self.is_var_path(path_index) {
@@ -504,7 +504,7 @@ impl<'a, 'tcx> MoveData<'tcx> {
             path: path_index,
             base_path: base_path_index,
             id: pattern_id,
-            mode: mode,
+            mode,
         };
 
         self.variant_matches.borrow_mut().push(variant_match);
@@ -680,9 +680,9 @@ impl<'a, 'tcx> FlowedMoveData<'a, 'tcx> {
         dfcx_assign.propagate(cfg, body);
 
         FlowedMoveData {
-            move_data: move_data,
+            move_data,
-            dfcx_moves: dfcx_moves,
+            dfcx_moves,
-            dfcx_assign: dfcx_assign,
+            dfcx_assign,
         }
     }
 

src/librustc_const_eval/_match.rs

@@ -166,8 +166,8 @@ impl<'a, 'tcx> MatchCheckCtxt<'a, 'tcx> {
         let pattern_arena = TypedArena::new();
 
         f(MatchCheckCtxt {
-            tcx: tcx,
+            tcx,
-            module: module,
+            module,
             pattern_arena: &pattern_arena,
             byte_array_map: FxHashMap(),
         })
@@ -296,7 +296,7 @@ impl<'tcx> Witness<'tcx> {
         let sub_pattern_tys = constructor_sub_pattern_tys(cx, ctor, ty);
         self.0.extend(sub_pattern_tys.into_iter().map(|ty| {
             Pattern {
-                ty: ty,
+                ty,
                 span: DUMMY_SP,
                 kind: box PatternKind::Wild,
             }
@@ -344,7 +344,7 @@ impl<'tcx> Witness<'tcx> {
                         if adt.variants.len() > 1 {
                             PatternKind::Variant {
                                 adt_def: adt,
-                                substs: substs,
+                                substs,
                                 variant_index: ctor.variant_index_for_adt(adt),
                                 subpatterns: pats
                             }
@@ -378,7 +378,7 @@ impl<'tcx> Witness<'tcx> {
         };
 
         self.0.push(Pattern {
-            ty: ty,
+            ty,
             span: DUMMY_SP,
             kind: Box::new(pat),
         });
@@ -673,7 +673,7 @@ fn is_useful_specialized<'p, 'a:'p, 'tcx: 'a>(
     let sub_pat_tys = constructor_sub_pattern_tys(cx, &ctor, lty);
     let wild_patterns_owned: Vec<_> = sub_pat_tys.iter().map(|ty| {
         Pattern {
-            ty: ty,
+            ty,
             span: DUMMY_SP,
             kind: box PatternKind::Wild,
         }

src/librustc_const_eval/check_match.rs

@@ -524,7 +524,7 @@ fn check_legality_of_move_bindings(cx: &MatchVisitor,
 /// FIXME: this should be done by borrowck.
 fn check_for_mutation_in_guard(cx: &MatchVisitor, guard: &hir::Expr) {
     let mut checker = MutationChecker {
-        cx: cx,
+        cx,
     };
     ExprUseVisitor::new(&mut checker, cx.tcx, cx.param_env, cx.region_maps, cx.tables)
         .walk_expr(guard);

src/librustc_const_eval/eval.rs

@@ -379,7 +379,7 @@ fn eval_const_expr_partial<'a, 'tcx>(cx: &ConstContext<'a, 'tcx>,
             tcx,
             param_env: cx.param_env,
             tables: tcx.typeck_tables_of(def_id),
-            substs: substs,
+            substs,
             fn_args: Some(call_args)
           };
           callee_cx.eval(&body.value)?

src/librustc_const_eval/pattern.rs

@@ -407,8 +407,8 @@ impl<'a, 'tcx> PatternContext<'a, 'tcx> {
                 }
 
                 PatternKind::Binding {
-                    mutability: mutability,
+                    mutability,
-                    mode: mode,
+                    mode,
                     name: ident.node,
                     var: id,
                     ty: var_ty,
@@ -470,7 +470,7 @@ impl<'a, 'tcx> PatternContext<'a, 'tcx> {
 
         Pattern {
             span: pat.span,
-            ty: ty,
+            ty,
             kind: Box::new(kind),
         }
     }
@@ -569,10 +569,10 @@ impl<'a, 'tcx> PatternContext<'a, 'tcx> {
                         _ => bug!("inappropriate type for def: {:?}", ty.sty),
                     };
                     PatternKind::Variant {
-                        adt_def: adt_def,
+                        adt_def,
-                        substs: substs,
+                        substs,
                         variant_index: adt_def.variant_index_with_id(variant_id),
-                        subpatterns: subpatterns,
+                        subpatterns,
                     }
                 } else {
                     PatternKind::Leaf { subpatterns: subpatterns }
@@ -626,8 +626,8 @@ impl<'a, 'tcx> PatternContext<'a, 'tcx> {
         };
 
         Pattern {
-            span: span,
+            span,
-            ty: ty,
+            ty,
             kind: Box::new(kind),
         }
     }
@@ -762,7 +762,7 @@ impl<'a, 'tcx> PatternContext<'a, 'tcx> {
         };
 
         Pattern {
-            span: span,
+            span,
             ty: pat_ty,
             kind: Box::new(kind),
         }

src/librustc_data_structures/array_vec.rs

@@ -281,8 +281,8 @@ impl<A: Array> IntoIterator for ArrayVec<A> {
         let indices = 0..self.count;
         mem::forget(self);
         Iter {
-            indices: indices,
+            indices,
-            store: store,
+            store,
         }
     }
 }

src/librustc_data_structures/bitvec.rs

@@ -151,7 +151,7 @@ impl BitMatrix {
         // element. Round up to an even number of u64s.
         let u64s_per_row = u64s(columns);
         BitMatrix {
-            columns: columns,
+            columns,
             vector: vec![0; rows * u64s_per_row],
         }
     }

src/librustc_data_structures/control_flow_graph/dominators/mod.rs

@@ -71,8 +71,8 @@ pub fn dominators_given_rpo<G: ControlFlowGraph>(graph: &G,
     }
 
     Dominators {
-        post_order_rank: post_order_rank,
+        post_order_rank,
-        immediate_dominators: immediate_dominators,
+        immediate_dominators,
     }
 }
 
@@ -181,7 +181,7 @@ impl<Node: Idx> Dominators<Node> {
         }
         DominatorTree {
             root: root.unwrap(),
-            children: children,
+            children,
         }
     }
 }

src/librustc_data_structures/control_flow_graph/test.rs

@@ -26,7 +26,7 @@ impl TestGraph {
     pub fn new(start_node: usize, edges: &[(usize, usize)]) -> Self {
         let mut graph = TestGraph {
             num_nodes: start_node + 1,
-            start_node: start_node,
+            start_node,
             successors: HashMap::new(),
             predecessors: HashMap::new(),
         };

src/librustc_data_structures/control_flow_graph/transpose.rs

@@ -23,8 +23,8 @@ impl<G: ControlFlowGraph> TransposedGraph<G> {
 
     pub fn with_start(base_graph: G, start_node: G::Node) -> Self {
         TransposedGraph {
-            base_graph: base_graph,
+            base_graph,
-            start_node: start_node,
+            start_node,
         }
     }
 }

src/librustc_data_structures/graph/mod.rs

@@ -153,7 +153,7 @@ impl<N: Debug, E: Debug> Graph<N, E> {
         let idx = self.next_node_index();
         self.nodes.push(Node {
             first_edge: [INVALID_EDGE_INDEX, INVALID_EDGE_INDEX],
-            data: data,
+            data,
         });
         idx
     }
@@ -189,9 +189,9 @@ impl<N: Debug, E: Debug> Graph<N, E> {
         // as the next pointers
         self.edges.push(Edge {
             next_edge: [source_first, target_first],
-            source: source,
+            source,
-            target: target,
+            target,
-            data: data,
+            data,
         });
 
         // adjust the firsts for each node target be the next object.
@@ -269,7 +269,7 @@ impl<N: Debug, E: Debug> Graph<N, E> {
         let first_edge = self.node(source).first_edge[direction.repr];
         AdjacentEdges {
             graph: self,
-            direction: direction,
+            direction,
             next: first_edge,
         }
     }
@@ -482,10 +482,10 @@ impl<'g, N: Debug, E: Debug> DepthFirstTraversal<'g, N, E> {
     pub fn new(graph: &'g Graph<N, E>, direction: Direction) -> Self {
         let visited = BitVector::new(graph.len_nodes());
         DepthFirstTraversal {
-            graph: graph,
+            graph,
             stack: vec![],
-            visited: visited,
+            visited,
-            direction: direction,
+            direction,
         }
     }
 
@@ -496,10 +496,10 @@ impl<'g, N: Debug, E: Debug> DepthFirstTraversal<'g, N, E> {
         let mut visited = BitVector::new(graph.len_nodes());
         visited.insert(start_node.node_id());
         DepthFirstTraversal {
-            graph: graph,
+            graph,
             stack: vec![start_node],
-            visited: visited,
+            visited,
-            direction: direction,
+            direction,
         }
     }
 

src/librustc_data_structures/obligation_forest/mod.rs

@@ -269,7 +269,7 @@ impl<O: ForestObligation> ObligationForest<O> {
                 let backtrace = self.error_at(index);
                 errors.push(Error {
                     error: error.clone(),
-                    backtrace: backtrace,
+                    backtrace,
                 });
             }
         }
@@ -346,7 +346,7 @@ impl<O: ForestObligation> ObligationForest<O> {
                     let backtrace = self.error_at(index);
                     errors.push(Error {
                         error: err,
-                        backtrace: backtrace,
+                        backtrace,
                     });
                 }
             }
@@ -357,8 +357,8 @@ impl<O: ForestObligation> ObligationForest<O> {
             // changed.
             return Outcome {
                 completed: vec![],
-                errors: errors,
+                errors,
-                stalled: stalled,
+                stalled,
             };
         }
 
@@ -372,8 +372,8 @@ impl<O: ForestObligation> ObligationForest<O> {
 
         Outcome {
             completed: completed_obligations,
-            errors: errors,
+            errors,
-            stalled: stalled,
+            stalled,
         }
     }
 
@@ -638,8 +638,8 @@ impl<O: ForestObligation> ObligationForest<O> {
 impl<O> Node<O> {
     fn new(parent: Option<NodeIndex>, obligation: O) -> Node<O> {
         Node {
-            obligation: obligation,
+            obligation,
-            parent: parent,
+            parent,
             state: Cell::new(NodeState::Pending),
             dependents: vec![],
         }

src/librustc_data_structures/unify/mod.rs

@@ -87,8 +87,8 @@ impl<K: UnifyKey> VarValue<K> {
     fn new(parent: K, value: K::Value, rank: u32) -> VarValue<K> {
         VarValue {
             parent: parent, // this is a root
-            value: value,
+            value,
-            rank: rank,
+            rank,
         }
     }
 
@@ -98,8 +98,8 @@ impl<K: UnifyKey> VarValue<K> {
 
     fn root(self, rank: u32, value: K::Value) -> VarValue<K> {
         VarValue {
-            rank: rank,
+            rank,
-            value: value,
+            value,
             ..self
         }
     }

src/librustc_driver/driver.rs

@@ -401,8 +401,8 @@ impl<'a, 'tcx> CompileState<'a, 'tcx> {
              out_dir: &'a Option<PathBuf>)
              -> Self {
         CompileState {
-            input: input,
+            input,
-            session: session,
+            session,
             out_dir: out_dir.as_ref().map(|s| &**s),
             out_file: None,
             arena: None,
@@ -868,7 +868,7 @@ pub fn phase_2_configure_and_expand<F>(sess: &Session,
             trait_map: resolver.trait_map,
             maybe_unused_trait_imports: resolver.maybe_unused_trait_imports,
         },
-        hir_forest: hir_forest,
+        hir_forest,
     })
 }
 

src/librustc_driver/lib.rs

@@ -802,7 +802,7 @@ impl RustcDefaultCalls {
                     let mut cfgs = Vec::new();
                     for &(name, ref value) in sess.parse_sess.config.iter() {
                         let gated_cfg = GatedCfg::gate(&ast::MetaItem {
-                            name: name,
+                            name,
                             node: ast::MetaItemKind::Word,
                             span: DUMMY_SP,
                         });

src/librustc_driver/pretty.rs

@@ -174,7 +174,7 @@ impl PpSourceMode {
         match *self {
             PpmNormal | PpmEveryBodyLoops | PpmExpanded => {
                 let annotation = NoAnn {
-                    sess: sess,
+                    sess,
                     hir_map: hir_map.map(|m| m.clone()),
                 };
                 f(&annotation)
@@ -182,14 +182,14 @@ impl PpSourceMode {
 
             PpmIdentified | PpmExpandedIdentified => {
                 let annotation = IdentifiedAnnotation {
-                    sess: sess,
+                    sess,
                     hir_map: hir_map.map(|m| m.clone()),
                 };
                 f(&annotation)
             }
             PpmExpandedHygiene => {
                 let annotation = HygieneAnnotation {
-                    sess: sess,
+                    sess,
                 };
                 f(&annotation)
             }
@@ -211,7 +211,7 @@ impl PpSourceMode {
         match *self {
             PpmNormal => {
                 let annotation = NoAnn {
-                    sess: sess,
+                    sess,
                     hir_map: Some(hir_map.clone()),
                 };
                 f(&annotation, hir_map.forest.krate())
@@ -219,7 +219,7 @@ impl PpSourceMode {
 
             PpmIdentified => {
                 let annotation = IdentifiedAnnotation {
-                    sess: sess,
+                    sess,
                     hir_map: Some(hir_map.clone()),
                 };
                 f(&annotation, hir_map.forest.krate())
@@ -235,7 +235,7 @@ impl PpSourceMode {
                                                                  |tcx, _, _, _| {
                     let empty_tables = ty::TypeckTables::empty(None);
                     let annotation = TypedAnnotation {
-                        tcx: tcx,
+                        tcx,
                         tables: Cell::new(&empty_tables)
                     };
                     let _ignore = tcx.dep_graph.in_ignore();
@@ -680,7 +680,7 @@ impl fold::Folder for ReplaceBodyWithLoop {
                     })
                     .into_iter()
                     .collect(),
-                rules: rules,
+                rules,
                 id: ast::DUMMY_NODE_ID,
                 span: syntax_pos::DUMMY_SP,
             })
@@ -739,7 +739,7 @@ fn print_flowgraph<'a, 'tcx, W: Write>(variants: Vec<borrowck_dot::Variant>,
         hir_map: &tcx.hir,
         cfg: &cfg,
         name: format!("node_{}", code.id()),
-        labelled_edges: labelled_edges,
+        labelled_edges,
     };
 
     match code {
@@ -758,7 +758,7 @@ fn print_flowgraph<'a, 'tcx, W: Write>(variants: Vec<borrowck_dot::Variant>,
 
             let lcfg = borrowck_dot::DataflowLabeller {
                 inner: lcfg,
-                variants: variants,
+                variants,
                 borrowck_ctxt: &bccx,
                 analysis_data: &analysis_data,
             };

src/librustc_errors/diagnostic.rs

@@ -83,9 +83,9 @@ impl Diagnostic {
 
     pub fn new_with_code(level: Level, code: Option<String>, message: &str) -> Self {
         Diagnostic {
-            level: level,
+            level,
             message: vec![(message.to_owned(), Style::NoStyle)],
-            code: code,
+            code,
             span: MultiSpan::new(),
             children: vec![],
             suggestions: vec![],
@@ -306,10 +306,10 @@ impl Diagnostic {
            span: MultiSpan,
            render_span: Option<RenderSpan>) {
         let sub = SubDiagnostic {
-            level: level,
+            level,
             message: vec![(message.to_owned(), Style::NoStyle)],
-            span: span,
+            span,
-            render_span: render_span,
+            render_span,
         };
         self.children.push(sub);
     }
@@ -322,10 +322,10 @@ impl Diagnostic {
                            span: MultiSpan,
                            render_span: Option<RenderSpan>) {
         let sub = SubDiagnostic {
-            level: level,
+            level,
-            message: message,
+            message,
-            span: span,
+            span,
-            render_span: render_span,
+            render_span,
         };
         self.children.push(sub);
     }

src/librustc_errors/diagnostic_builder.rs

@@ -179,7 +179,7 @@ impl<'a> DiagnosticBuilder<'a> {
                          message: &str)
                          -> DiagnosticBuilder<'a> {
         DiagnosticBuilder {
-            handler: handler,
+            handler,
             diagnostic: Diagnostic::new_with_code(level, code, message)
         }
     }

src/librustc_errors/emitter.rs

@@ -120,7 +120,7 @@ impl EmitterWriter {
         if color_config.use_color() {
             let dst = Destination::from_stderr();
             EmitterWriter {
-                dst: dst,
+                dst,
                 cm: code_map,
             }
         } else {
@@ -156,7 +156,7 @@ impl EmitterWriter {
                     }
                     // We don't have a line yet, create one
                     slot.lines.push(Line {
-                        line_index: line_index,
+                        line_index,
                         annotations: vec![ann],
                     });
                     slot.lines.sort();
@@ -165,9 +165,9 @@ impl EmitterWriter {
             }
             // This is the first time we're seeing the file
             file_vec.push(FileWithAnnotatedLines {
-                file: file,
+                file,
                 lines: vec![Line {
-                                line_index: line_index,
+                                line_index,
                                 annotations: vec![ann],
                             }],
                 multiline_depth: 0,

src/librustc_errors/lib.rs

@@ -155,8 +155,8 @@ impl CodeSuggestion {
         let lo = primary_spans.iter().map(|sp| sp.0.lo).min().unwrap();
         let hi = primary_spans.iter().map(|sp| sp.0.hi).min().unwrap();
         let bounding_span = Span {
-            lo: lo,
+            lo,
-            hi: hi,
+            hi,
             ctxt: NO_EXPANSION,
         };
         let lines = cm.span_to_lines(bounding_span).unwrap();
@@ -292,8 +292,8 @@ impl Handler {
         Handler {
             err_count: Cell::new(0),
             emitter: RefCell::new(e),
-            can_emit_warnings: can_emit_warnings,
+            can_emit_warnings,
-            treat_err_as_bug: treat_err_as_bug,
+            treat_err_as_bug,
             continue_after_error: Cell::new(true),
             delayed_span_bug: RefCell::new(None),
         }

src/librustc_incremental/assert_dep_graph.rs

@@ -76,7 +76,7 @@ pub fn assert_dep_graph<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) {
 
     // Find annotations supplied by user (if any).
     let (if_this_changed, then_this_would_need) = {
-        let mut visitor = IfThisChanged { tcx: tcx,
+        let mut visitor = IfThisChanged { tcx,
                                           if_this_changed: vec![],
                                           then_this_would_need: vec![] };
         visitor.process_attrs(ast::CRATE_NODE_ID, &tcx.hir.krate().attrs);

src/librustc_incremental/persist/dirty_clean.rs

@@ -83,15 +83,15 @@ pub fn check_dirty_clean_annotations<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
     debug!("query-nodes: {:?}", query.nodes());
     let krate = tcx.hir.krate();
     let mut dirty_clean_visitor = DirtyCleanVisitor {
-        tcx: tcx,
+        tcx,
         query: &query,
-        dirty_inputs: dirty_inputs,
+        dirty_inputs,
         checked_attrs: FxHashSet(),
     };
     krate.visit_all_item_likes(&mut dirty_clean_visitor);
 
     let mut all_attrs = FindAllAttrs {
-        tcx: tcx,
+        tcx,
         attr_names: vec![ATTR_DIRTY, ATTR_CLEAN],
         found_attrs: vec![],
     };
@@ -243,15 +243,15 @@ pub fn check_dirty_clean_metadata<'a, 'tcx>(
     tcx.dep_graph.with_ignore(||{
         let krate = tcx.hir.krate();
         let mut dirty_clean_visitor = DirtyCleanMetadataVisitor {
-            tcx: tcx,
+            tcx,
-            prev_metadata_hashes: prev_metadata_hashes,
+            prev_metadata_hashes,
-            current_metadata_hashes: current_metadata_hashes,
+            current_metadata_hashes,
             checked_attrs: FxHashSet(),
         };
         intravisit::walk_crate(&mut dirty_clean_visitor, krate);
 
         let mut all_attrs = FindAllAttrs {
-            tcx: tcx,
+            tcx,
             attr_names: vec![ATTR_DIRTY_METADATA, ATTR_CLEAN_METADATA],
             found_attrs: vec![],
         };

src/librustc_incremental/persist/hash.rs

@@ -38,8 +38,8 @@ impl<'a, 'tcx> HashContext<'a, 'tcx> {
                incremental_hashes_map: &'a IncrementalHashesMap)
                -> Self {
         HashContext {
-            tcx: tcx,
+            tcx,
-            incremental_hashes_map: incremental_hashes_map,
+            incremental_hashes_map,
             metadata_hashes: FxHashMap(),
             crate_hashes: FxHashMap(),
         }

src/librustc_incremental/persist/preds/compress/classify/mod.rs

@@ -45,7 +45,7 @@ impl<'a, 'g, N, I, O> Classify<'a, 'g, N, I, O>
 {
     pub(super) fn new(r: &'a mut GraphReduce<'g, N, I, O>) -> Self {
         Classify {
-            r: r,
+            r,
             colors: vec![Color::White; r.in_graph.len_nodes()],
             stack: vec![],
             dag: Dag {

src/librustc_incremental/persist/preds/mod.rs

@@ -103,8 +103,8 @@ impl<'q> Predecessors<'q> {
 
         Predecessors {
             reduced_graph: graph,
-            bootstrap_outputs: bootstrap_outputs,
+            bootstrap_outputs,
-            hashes: hashes,
+            hashes,
         }
     }
 }

src/librustc_incremental/persist/work_product.rs

@@ -57,7 +57,7 @@ pub fn save_trans_partition(sess: &Session,
     let work_product = WorkProduct {
         cgu_name: cgu_name.to_string(),
         input_hash: partition_hash,
-        saved_files: saved_files,
+        saved_files,
     };
 
     sess.dep_graph.insert_work_product(&work_product_id, work_product);

src/librustc_llvm/archive_ro.rs

@@ -94,7 +94,7 @@ impl<'a> Iterator for Iter<'a> {
             ::last_error().map(Err)
         } else {
             Some(Ok(Child {
-                ptr: ptr,
+                ptr,
                 _data: marker::PhantomData,
             }))
         }

src/librustc_llvm/diagnostic.rs

@@ -82,12 +82,12 @@ impl OptimizationDiagnostic {
         }
 
         OptimizationDiagnostic {
-            kind: kind,
+            kind,
             pass_name: pass_name.expect("got a non-UTF8 pass name from LLVM"),
-            function: function,
+            function,
-            line: line,
+            line,
-            column: column,
+            column,
-            filename: filename,
+            filename,
             message: message.expect("got a non-UTF8 OptimizationDiagnostic message from LLVM")
         }
     }

src/librustc_metadata/astencode.rs

@@ -53,7 +53,7 @@ impl<'a, 'b, 'tcx> IsolatedEncoder<'a, 'b, 'tcx> {
             body: lazy_body,
             tables: lazy_tables,
             nested_bodies: lazy_nested_bodies,
-            rvalue_promotable_to_static: rvalue_promotable_to_static
+            rvalue_promotable_to_static,
         })
     }
 }

src/librustc_metadata/creader.rs

@@ -162,8 +162,8 @@ enum LoadResult {
 impl<'a> CrateLoader<'a> {
     pub fn new(sess: &'a Session, cstore: &'a CStore, local_crate_name: &str) -> Self {
         CrateLoader {
-            sess: sess,
+            sess,
-            cstore: cstore,
+            cstore,
             next_crate_num: cstore.next_crate_num(),
             local_crate_name: Symbol::intern(local_crate_name),
         }
@@ -184,7 +184,7 @@ impl<'a> CrateLoader<'a> {
                 };
                 Some(ExternCrateInfo {
                     ident: i.ident.name,
-                    name: name,
+                    name,
                     id: i.id,
                     dep_kind: if attr::contains_name(&i.attrs, "no_link") {
                         DepKind::UnexportedMacrosOnly
@@ -325,25 +325,25 @@ impl<'a> CrateLoader<'a> {
             });
 
         let mut cmeta = cstore::CrateMetadata {
-            name: name,
+            name,
             extern_crate: Cell::new(None),
             def_path_table: Rc::new(def_path_table),
-            exported_symbols: exported_symbols,
+            exported_symbols,
-            trait_impls: trait_impls,
+            trait_impls,
             proc_macros: crate_root.macro_derive_registrar.map(|_| {
                 self.load_derive_macros(&crate_root, dylib.clone().map(|p| p.0), span)
             }),
             root: crate_root,
             blob: metadata,
             cnum_map: RefCell::new(cnum_map),
-            cnum: cnum,
+            cnum,
             codemap_import_info: RefCell::new(vec![]),
             attribute_cache: RefCell::new([Vec::new(), Vec::new()]),
             dep_kind: Cell::new(dep_kind),
             source: cstore::CrateSource {
-                dylib: dylib,
+                dylib,
-                rlib: rlib,
+                rlib,
-                rmeta: rmeta,
+                rmeta,
             },
             // Initialize this with an empty set. The field is populated below
             // after we were able to deserialize its contents.
@@ -388,14 +388,14 @@ impl<'a> CrateLoader<'a> {
             info!("falling back to a load");
             let mut locate_ctxt = locator::Context {
                 sess: self.sess,
-                span: span,
+                span,
-                ident: ident,
+                ident,
                 crate_name: name,
                 hash: hash.map(|a| &*a),
                 filesearch: self.sess.target_filesearch(path_kind),
                 target: &self.sess.target.target,
                 triple: &self.sess.opts.target_triple,
-                root: root,
+                root,
                 rejected_via_hash: vec![],
                 rejected_via_triple: vec![],
                 rejected_via_kind: vec![],
@@ -547,7 +547,7 @@ impl<'a> CrateLoader<'a> {
         let mut target_only = false;
         let mut locate_ctxt = locator::Context {
             sess: self.sess,
-            span: span,
+            span,
             ident: info.ident,
             crate_name: info.name,
             hash: None,
@@ -596,9 +596,9 @@ impl<'a> CrateLoader<'a> {
         };
 
         ExtensionCrate {
-            metadata: metadata,
+            metadata,
             dylib: dylib.map(|p| p.0),
-            target_only: target_only,
+            target_only,
         }
     }
 
@@ -1221,9 +1221,9 @@ impl<'a> CrateLoader<'a> {
                 .collect();
             let lib = NativeLibrary {
                 name: n,
-                kind: kind,
+                kind,
-                cfg: cfg,
+                cfg,
-                foreign_items: foreign_items,
+                foreign_items,
             };
             register_native_lib(self.sess, self.cstore, Some(m.span), lib);
         }

src/librustc_metadata/cstore.rs

@@ -114,7 +114,7 @@ impl CStore {
             statically_included_foreign_items: RefCell::new(FxHashSet()),
             dllimport_foreign_items: RefCell::new(FxHashSet()),
             visible_parent_map: RefCell::new(FxHashMap()),
-            metadata_loader: metadata_loader,
+            metadata_loader,
         }
     }
 

src/librustc_metadata/cstore_impl.rs

@@ -282,7 +282,7 @@ impl CrateStore for cstore::CStore {
     {
         self.get_crate_data(cnum).root.plugin_registrar_fn.map(|index| DefId {
             krate: cnum,
-            index: index
+            index,
         })
     }
 
@@ -290,7 +290,7 @@ impl CrateStore for cstore::CStore {
     {
         self.get_crate_data(cnum).root.macro_derive_registrar.map(|index| DefId {
             krate: cnum,
-            index: index
+            index,
         })
     }
 

src/librustc_metadata/decoder.rs

@@ -69,7 +69,7 @@ pub trait Metadata<'a, 'tcx>: Copy {
             opaque: opaque::Decoder::new(self.raw_bytes(), pos),
             cdata: self.cdata(),
             sess: self.sess().or(tcx.map(|tcx| tcx.sess)),
-            tcx: tcx,
+            tcx,
             last_filemap_index: 0,
             lazy_state: LazyState::NoNode,
         }
@@ -468,7 +468,7 @@ impl<'a, 'tcx> CrateMetadata {
     fn local_def_id(&self, index: DefIndex) -> DefId {
         DefId {
             krate: self.cnum,
-            index: index,
+            index,
         }
     }
 
@@ -703,7 +703,7 @@ impl<'a, 'tcx> CrateMetadata {
                         for child_index in child.children.decode((self, sess)) {
                             if let Some(def) = self.get_def(child_index) {
                                 callback(def::Export {
-                                    def: def,
+                                    def,
                                     ident: Ident::with_empty_ctxt(self.item_name(child_index)),
                                     span: self.entry(child_index).span.decode((self, sess)),
                                 });
@@ -835,8 +835,8 @@ impl<'a, 'tcx> CrateMetadata {
         };
 
         ty::AssociatedItem {
-            name: name,
+            name,
-            kind: kind,
+            kind,
             vis: item.visibility.decode(self),
             defaultness: container.defaultness(),
             def_id: self.local_def_id(id),

src/librustc_metadata/encoder.rs

@@ -422,16 +422,16 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
                 None
             },
 
-            crate_deps: crate_deps,
+            crate_deps,
-            dylib_dependency_formats: dylib_dependency_formats,
+            dylib_dependency_formats,
-            lang_items: lang_items,
+            lang_items,
-            lang_items_missing: lang_items_missing,
+            lang_items_missing,
-            native_libraries: native_libraries,
+            native_libraries,
-            codemap: codemap,
+            codemap,
-            def_path_table: def_path_table,
+            def_path_table,
-            impls: impls,
+            impls,
-            exported_symbols: exported_symbols,
+            exported_symbols,
-            index: index,
+            index,
         });
 
         let total_bytes = self.position();
@@ -719,15 +719,15 @@ impl<'a, 'b: 'a, 'tcx: 'b> IsolatedEncoder<'a, 'b, 'tcx> {
                     };
                     FnData {
                         constness: hir::Constness::NotConst,
-                        arg_names: arg_names,
+                        arg_names,
                         sig: self.lazy(&tcx.fn_sig(def_id)),
                     }
                 } else {
                     bug!()
                 };
                 EntryKind::Method(self.lazy(&MethodData {
-                    fn_data: fn_data,
+                    fn_data,
-                    container: container,
+                    container,
                     has_self: trait_item.method_has_self_argument,
                 }))
             }
@@ -735,7 +735,7 @@ impl<'a, 'b: 'a, 'tcx: 'b> IsolatedEncoder<'a, 'b, 'tcx> {
         };
 
         Entry {
-            kind: kind,
+            kind,
             visibility: self.lazy(&trait_item.vis),
             span: self.lazy(&ast_item.span),
             attributes: self.encode_attributes(&ast_item.attrs),
@@ -805,8 +805,8 @@ impl<'a, 'b: 'a, 'tcx: 'b> IsolatedEncoder<'a, 'b, 'tcx> {
                     bug!()
                 };
                 EntryKind::Method(self.lazy(&MethodData {
-                    fn_data: fn_data,
+                    fn_data,
-                    container: container,
+                    container,
                     has_self: impl_item.method_has_self_argument,
                 }))
             }
@@ -828,7 +828,7 @@ impl<'a, 'b: 'a, 'tcx: 'b> IsolatedEncoder<'a, 'b, 'tcx> {
         };
 
         Entry {
-            kind: kind,
+            kind,
             visibility: self.lazy(&impl_item.vis),
             span: self.lazy(&ast_item.span),
             attributes: self.encode_attributes(&ast_item.attrs),
@@ -915,7 +915,7 @@ impl<'a, 'b: 'a, 'tcx: 'b> IsolatedEncoder<'a, 'b, 'tcx> {
             }
             hir::ItemFn(_, _, constness, .., body) => {
                 let data = FnData {
-                    constness: constness,
+                    constness,
                     arg_names: self.encode_fn_arg_names_for_body(body),
                     sig: self.lazy(&tcx.fn_sig(def_id)),
                 };
@@ -946,7 +946,7 @@ impl<'a, 'b: 'a, 'tcx: 'b> IsolatedEncoder<'a, 'b, 'tcx> {
                 EntryKind::Struct(self.lazy(&VariantData {
                     ctor_kind: variant.ctor_kind,
                     discr: variant.discr,
-                    struct_ctor: struct_ctor,
+                    struct_ctor,
                     ctor_sig: None,
                 }), repr_options)
             }
@@ -998,10 +998,10 @@ impl<'a, 'b: 'a, 'tcx: 'b> IsolatedEncoder<'a, 'b, 'tcx> {
                     });
 
                 let data = ImplData {
-                    polarity: polarity,
+                    polarity,
-                    defaultness: defaultness,
+                    defaultness,
                     parent_impl: parent,
-                    coerce_unsized_info: coerce_unsized_info,
+                    coerce_unsized_info,
                     trait_ref: trait_ref.map(|trait_ref| self.lazy(&trait_ref)),
                 };
 
@@ -1023,7 +1023,7 @@ impl<'a, 'b: 'a, 'tcx: 'b> IsolatedEncoder<'a, 'b, 'tcx> {
         };
 
         Entry {
-            kind: kind,
+            kind,
             visibility: self.lazy(&ty::Visibility::from_hir(&item.vis, item.id, tcx)),
             span: self.lazy(&item.span),
             attributes: self.encode_attributes(&item.attrs),
@@ -1333,7 +1333,7 @@ impl<'a, 'b: 'a, 'tcx: 'b> IsolatedEncoder<'a, 'b, 'tcx> {
         debug!("IsolatedEncoder::encode_impls()");
         let tcx = self.tcx;
         let mut visitor = ImplVisitor {
-            tcx: tcx,
+            tcx,
             impls: FxHashMap(),
         };
         tcx.hir.krate().visit_all_item_likes(&mut visitor);
@@ -1412,7 +1412,7 @@ impl<'a, 'b: 'a, 'tcx: 'b> IsolatedEncoder<'a, 'b, 'tcx> {
         };
 
         Entry {
-            kind: kind,
+            kind,
             visibility: self.lazy(&ty::Visibility::from_hir(&nitem.vis, nitem.id, tcx)),
             span: self.lazy(&nitem.span),
             attributes: self.encode_attributes(&nitem.attrs),
@@ -1653,14 +1653,14 @@ pub fn encode_metadata<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
     let (root, metadata_hashes) = {
         let mut ecx = EncodeContext {
             opaque: opaque::Encoder::new(&mut cursor),
-            tcx: tcx,
+            tcx,
-            link_meta: link_meta,
+            link_meta,
-            exported_symbols: exported_symbols,
+            exported_symbols,
             lazy_state: LazyState::NoNode,
             type_shorthands: Default::default(),
             predicate_shorthands: Default::default(),
             metadata_hashes: EncodedMetadataHashes::new(),
-            compute_ich: compute_ich,
+            compute_ich,
         };
 
         // Encode the rustc version string in a predictable location.

src/librustc_metadata/index_builder.rs

@@ -92,7 +92,7 @@ impl<'a, 'b, 'tcx> IndexBuilder<'a, 'b, 'tcx> {
     pub fn new(ecx: &'a mut EncodeContext<'b, 'tcx>) -> Self {
         IndexBuilder {
             items: Index::new(ecx.tcx.hir.definitions().def_index_counts_lo_hi()),
-            ecx: ecx,
+            ecx,
         }
     }
 
@@ -137,7 +137,7 @@ impl<'a, 'b, 'tcx> IndexBuilder<'a, 'b, 'tcx> {
         if let Some(hash) = fingerprint {
             ecx.metadata_hashes.hashes.push(EncodedMetadataHash {
                 def_index: id.index,
-                hash: hash,
+                hash,
             });
         }
 

src/librustc_metadata/isolated_encoder.rs

@@ -32,8 +32,8 @@ impl<'a, 'b: 'a, 'tcx: 'b> IsolatedEncoder<'a, 'b, 'tcx> {
         let tcx = ecx.tcx;
         let compute_ich = ecx.compute_ich;
         IsolatedEncoder {
-            tcx: tcx,
+            tcx,
-            ecx: ecx,
+            ecx,
             hcx: if compute_ich {
                 // We are always hashing spans for things in metadata because
                 // don't know if a downstream crate will use them or not.

src/librustc_metadata/locator.rs

@@ -518,9 +518,9 @@ impl<'a> Context<'a> {
             if let Some((h, m)) = slot {
                 libraries.insert(h,
                                  Library {
-                                     dylib: dylib,
+                                     dylib,
-                                     rlib: rlib,
+                                     rlib,
-                                     rmeta: rmeta,
+                                     rmeta,
                                      metadata: m,
                                  });
             }
@@ -808,10 +808,10 @@ impl<'a> Context<'a> {
         match slot {
             Some((_, metadata)) => {
                 Some(Library {
-                    dylib: dylib,
+                    dylib,
-                    rlib: rlib,
+                    rlib,
-                    rmeta: rmeta,
+                    rmeta,
-                    metadata: metadata,
+                    metadata,
                 })
             }
             None => None,

src/librustc_metadata/schema.rs

@@ -84,7 +84,7 @@ pub struct Lazy<T> {
 impl<T> Lazy<T> {
     pub fn with_position(position: usize) -> Lazy<T> {
         Lazy {
-            position: position,
+            position,
             _marker: PhantomData,
         }
     }
@@ -141,8 +141,8 @@ impl<T> LazySeq<T> {
 
     pub fn with_position_and_length(position: usize, len: usize) -> LazySeq<T> {
         LazySeq {
-            len: len,
+            len,
-            position: position,
+            position,
             _marker: PhantomData,
         }
     }
@@ -199,7 +199,7 @@ pub struct Tracked<T> {
 impl<T> Tracked<T> {
     pub fn new(state: T) -> Tracked<T> {
         Tracked {
-            state: state,
+            state,
         }
     }
 

src/librustc_mir/build/cfg.rs

@@ -49,7 +49,7 @@ impl<'tcx> CFG<'tcx> {
                            source_info: SourceInfo,
                            extent: CodeExtent) {
         self.push(block, Statement {
-            source_info: source_info,
+            source_info,
             kind: StatementKind::EndRegion(extent),
         });
     }
@@ -60,7 +60,7 @@ impl<'tcx> CFG<'tcx> {
                        lvalue: &Lvalue<'tcx>,
                        rvalue: Rvalue<'tcx>) {
         self.push(block, Statement {
-            source_info: source_info,
+            source_info,
             kind: StatementKind::Assign(lvalue.clone(), rvalue)
         });
     }
@@ -93,8 +93,8 @@ impl<'tcx> CFG<'tcx> {
                       block,
                       self.block_data(block));
         self.block_data_mut(block).terminator = Some(Terminator {
-            source_info: source_info,
+            source_info,
-            kind: kind,
+            kind,
         });
     }
 }

src/librustc_mir/build/expr/as_rvalue.rs

@@ -100,7 +100,7 @@ impl<'a, 'gcx, 'tcx> Builder<'a, 'gcx, 'tcx> {
                 if let Some(scope) = scope {
                     // schedule a shallow free of that memory, lest we unwind:
                     this.cfg.push(block, Statement {
-                        source_info: source_info,
+                        source_info,
                         kind: StatementKind::StorageLive(result.clone())
                     });
                     this.schedule_drop(expr_span, scope, &result, value.ty);

src/librustc_mir/build/expr/as_temp.rs

@@ -52,7 +52,7 @@ impl<'a, 'gcx, 'tcx> Builder<'a, 'gcx, 'tcx> {
 
         if !expr_ty.is_never() && temp_lifetime.is_some() {
             this.cfg.push(block, Statement {
-                source_info: source_info,
+                source_info,
                 kind: StatementKind::StorageLive(temp.clone())
             });
         }