Remove needless lifetimes

Author: jeremystucki

src/librustc/hir/map/hir_id_validator.rs

@@ -4,7 +4,7 @@ use crate::hir::itemlikevisit::ItemLikeVisitor;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_data_structures::sync::{Lock, ParallelIterator, par_iter};
 
-pub fn check_crate<'hir>(hir_map: &hir::map::Map<'hir>) {
+pub fn check_crate(hir_map: &hir::map::Map<'_>) {
     hir_map.dep_graph.assert_ignored();
 
     let errors = Lock::new(Vec::new());

src/librustc/hir/map/mod.rs

@@ -147,15 +147,15 @@ impl Forest {
         }
     }
 
-    pub fn krate<'hir>(&'hir self) -> &'hir Crate {
+    pub fn krate(&self) -> &Crate {
         self.dep_graph.read(DepNode::new_no_params(DepKind::Krate));
         &self.krate
     }
 
     /// This is used internally in the dependency tracking system.
     /// Use the `krate` method to ensure your dependency on the
     /// crate is tracked.
-    pub fn untracked_krate<'hir>(&'hir self) -> &'hir Crate {
+    pub fn untracked_krate(&self) -> &Crate {
         &self.krate
     }
 }
@@ -1085,7 +1085,7 @@ impl<'a> NodesMatchingSuffix<'a> {
         // If `id` itself is a mod named `m` with parent `p`, then
         // returns `Some(id, m, p)`.  If `id` has no mod in its parent
         // chain, then returns `None`.
-        fn find_first_mod_parent<'a>(map: &'a Map<'_>, mut id: HirId) -> Option<(HirId, Name)> {
+        fn find_first_mod_parent(map: &Map<'_>, mut id: HirId) -> Option<(HirId, Name)> {
             loop {
                 if let Node::Item(item) = map.find(id)? {
                     if item_is_mod(&item) {

src/librustc/traits/coherence.rs

@@ -48,8 +48,8 @@ pub fn add_placeholder_note(err: &mut errors::DiagnosticBuilder<'_>) {
 /// If there are types that satisfy both impls, invokes `on_overlap`
 /// with a suitably-freshened `ImplHeader` with those types
 /// substituted. Otherwise, invokes `no_overlap`.
-pub fn overlapping_impls<'tcx, F1, F2, R>(
-    tcx: TyCtxt<'tcx>,
+pub fn overlapping_impls<F1, F2, R>(
+    tcx: TyCtxt<'_>,
     impl1_def_id: DefId,
     impl2_def_id: DefId,
     intercrate_mode: IntercrateMode,
@@ -247,10 +247,10 @@ pub enum OrphanCheckErr<'tcx> {
 ///
 /// 1. All type parameters in `Self` must be "covered" by some local type constructor.
 /// 2. Some local type must appear in `Self`.
-pub fn orphan_check<'tcx>(
-    tcx: TyCtxt<'tcx>,
+pub fn orphan_check(
+    tcx: TyCtxt<'_>,
     impl_def_id: DefId,
-) -> Result<(), OrphanCheckErr<'tcx>> {
+) -> Result<(), OrphanCheckErr<'_>> {
     debug!("orphan_check({:?})", impl_def_id);
 
     // We only except this routine to be invoked on implementations

src/librustc/traits/error_reporting.rs

@@ -247,7 +247,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
     fn fuzzy_match_tys(&self, a: Ty<'tcx>, b: Ty<'tcx>) -> bool {
         /// returns the fuzzy category of a given type, or None
         /// if the type can be equated to any type.
-        fn type_category<'tcx>(t: Ty<'tcx>) -> Option<u32> {
+        fn type_category(t: Ty<'_>) -> Option<u32> {
             match t.sty {
                 ty::Bool => Some(0),
                 ty::Char => Some(1),

src/librustc/traits/object_safety.rs

@@ -702,6 +702,6 @@ impl<'tcx> TyCtxt<'tcx> {
     }
 }
 
-pub(super) fn is_object_safe_provider<'tcx>(tcx: TyCtxt<'tcx>, trait_def_id: DefId) -> bool {
+pub(super) fn is_object_safe_provider(tcx: TyCtxt<'_>, trait_def_id: DefId) -> bool {
     tcx.object_safety_violations(trait_def_id).is_empty()
 }

src/librustc/traits/project.rs

@@ -1509,8 +1509,8 @@ fn confirm_impl_candidate<'cx, 'tcx>(
 ///
 /// Based on the "projection mode", this lookup may in fact only examine the
 /// topmost impl. See the comments for `Reveal` for more details.
-fn assoc_ty_def<'cx, 'tcx>(
-    selcx: &SelectionContext<'cx, 'tcx>,
+fn assoc_ty_def(
+    selcx: &SelectionContext<'_, '_>,
     impl_def_id: DefId,
     assoc_ty_def_id: DefId,
 ) -> specialization_graph::NodeItem<ty::AssocItem> {

src/librustc/traits/util.rs

@@ -417,7 +417,7 @@ pub struct SupertraitDefIds<'tcx> {
     visited: FxHashSet<DefId>,
 }
 
-pub fn supertrait_def_ids<'tcx>(tcx: TyCtxt<'tcx>, trait_def_id: DefId) -> SupertraitDefIds<'tcx> {
+pub fn supertrait_def_ids(tcx: TyCtxt<'_>, trait_def_id: DefId) -> SupertraitDefIds<'_> {
     SupertraitDefIds {
         tcx,
         stack: vec![trait_def_id],

src/librustc_codegen_ssa/traits/backend.rs

@@ -44,7 +44,7 @@ pub trait ExtraBackendMethods: CodegenBackend + WriteBackendMethods + Sized + Se
         mods: &mut Self::Module,
         kind: AllocatorKind,
     );
-    fn compile_codegen_unit<'tcx>(&self, tcx: TyCtxt<'tcx>, cgu_name: InternedString);
+    fn compile_codegen_unit(&self, tcx: TyCtxt<'_>, cgu_name: InternedString);
     // If find_features is true this won't access `sess.crate_types` by assuming
     // that `is_pie_binary` is false. When we discover LLVM target features
     // `sess.crate_types` is uninitialized so we cannot access it.

src/librustc_codegen_ssa/traits/builder.rs

@@ -36,7 +36,7 @@ pub trait BuilderMethods<'a, 'tcx>:
 {
     fn new_block<'b>(cx: &'a Self::CodegenCx, llfn: Self::Value, name: &'b str) -> Self;
     fn with_cx(cx: &'a Self::CodegenCx) -> Self;
-    fn build_sibling_block<'b>(&self, name: &'b str) -> Self;
+    fn build_sibling_block(&self, name: &str) -> Self;
     fn cx(&self) -> &Self::CodegenCx;
     fn llbb(&self) -> Self::BasicBlock;
 

src/librustc_mir/transform/add_retag.rs

@@ -14,8 +14,8 @@ pub struct AddRetag;
 /// after the assignment, we can be sure to obtain the same place value.
 /// (Concurrent accesses by other threads are no problem as these are anyway non-atomic
 /// copies.  Data races are UB.)
-fn is_stable<'tcx>(
-    place: &Place<'tcx>,
+fn is_stable(
+    place: &Place<'_>,
 ) -> bool {
     use rustc::mir::Place::*;