Remove needless lifetimes

Author: jeremystucki

src/librustc/lint/mod.rs

@@ -765,7 +765,7 @@ pub fn maybe_lint_level_root(tcx: TyCtxt<'_>, id: hir::HirId) -> bool {
     attrs.iter().any(|attr| Level::from_symbol(attr.name_or_empty()).is_some())
 }
 
-fn lint_levels<'tcx>(tcx: TyCtxt<'tcx>, cnum: CrateNum) -> &'tcx LintLevelMap {
+fn lint_levels(tcx: TyCtxt<'_>, cnum: CrateNum) -> &LintLevelMap {
     assert_eq!(cnum, LOCAL_CRATE);
     let mut builder = LintLevelMapBuilder {
         levels: LintLevelSets::builder(tcx.sess),

src/librustc/middle/cstore.rs

@@ -211,7 +211,7 @@ pub trait CrateStore {
     fn crates_untracked(&self) -> Vec<CrateNum>;
 
     // utility functions
-    fn encode_metadata<'tcx>(&self, tcx: TyCtxt<'tcx>) -> EncodedMetadata;
+    fn encode_metadata(&self, tcx: TyCtxt<'_>) -> EncodedMetadata;
     fn metadata_encoding_version(&self) -> &[u8];
 }
 

src/librustc/middle/dead.rs

@@ -26,7 +26,7 @@ use syntax_pos;
 // explored. For example, if it's a live Node::Item that is a
 // function, then we should explore its block to check for codes that
 // may need to be marked as live.
-fn should_explore<'tcx>(tcx: TyCtxt<'tcx>, hir_id: hir::HirId) -> bool {
+fn should_explore(tcx: TyCtxt<'_>, hir_id: hir::HirId) -> bool {
     match tcx.hir().find(hir_id) {
         Some(Node::Item(..)) |
         Some(Node::ImplItem(..)) |
@@ -662,7 +662,7 @@ impl Visitor<'tcx> for DeadVisitor<'tcx> {
     }
 }
 
-pub fn check_crate<'tcx>(tcx: TyCtxt<'tcx>) {
+pub fn check_crate(tcx: TyCtxt<'_>) {
     let access_levels = &tcx.privacy_access_levels(LOCAL_CRATE);
     let krate = tcx.hir().krate();
     let live_symbols = find_live(tcx, access_levels, krate);

src/librustc/middle/dependency_format.rs

@@ -81,7 +81,7 @@ pub enum Linkage {
     Dynamic,
 }
 
-pub fn calculate<'tcx>(tcx: TyCtxt<'tcx>) {
+pub fn calculate(tcx: TyCtxt<'_>) {
     let sess = &tcx.sess;
     let fmts = sess.crate_types.borrow().iter().map(|&ty| {
         let linkage = calculate_type(tcx, ty);
@@ -92,7 +92,7 @@ pub fn calculate<'tcx>(tcx: TyCtxt<'tcx>) {
     sess.dependency_formats.set(fmts);
 }
 
-fn calculate_type<'tcx>(tcx: TyCtxt<'tcx>, ty: config::CrateType) -> DependencyList {
+fn calculate_type(tcx: TyCtxt<'_>, ty: config::CrateType) -> DependencyList {
     let sess = &tcx.sess;
 
     if !sess.opts.output_types.should_codegen() {
@@ -267,7 +267,7 @@ fn add_library(
     }
 }
 
-fn attempt_static<'tcx>(tcx: TyCtxt<'tcx>) -> Option<DependencyList> {
+fn attempt_static(tcx: TyCtxt<'_>) -> Option<DependencyList> {
     let sess = &tcx.sess;
     let crates = cstore::used_crates(tcx, RequireStatic);
     if !crates.iter().by_ref().all(|&(_, ref p)| p.is_some()) {
@@ -324,7 +324,7 @@ fn activate_injected_dep(injected: Option<CrateNum>,
 
 // After the linkage for a crate has been determined we need to verify that
 // there's only going to be one allocator in the output.
-fn verify_ok<'tcx>(tcx: TyCtxt<'tcx>, list: &[Linkage]) {
+fn verify_ok(tcx: TyCtxt<'_>, list: &[Linkage]) {
     let sess = &tcx.sess;
     if list.len() == 0 {
         return

src/librustc/middle/intrinsicck.rs

@@ -10,7 +10,7 @@ use syntax_pos::{Span, sym};
 use crate::hir::intravisit::{self, Visitor, NestedVisitorMap};
 use crate::hir;
 
-fn check_mod_intrinsics<'tcx>(tcx: TyCtxt<'tcx>, module_def_id: DefId) {
+fn check_mod_intrinsics(tcx: TyCtxt<'_>, module_def_id: DefId) {
     tcx.hir().visit_item_likes_in_module(
         module_def_id,
         &mut ItemVisitor { tcx }.as_deep_visitor()

src/librustc/middle/lib_features.rs

@@ -142,7 +142,7 @@ impl Visitor<'tcx> for LibFeatureCollector<'tcx> {
     }
 }
 
-pub fn collect<'tcx>(tcx: TyCtxt<'tcx>) -> LibFeatures {
+pub fn collect(tcx: TyCtxt<'_>) -> LibFeatures {
     let mut collector = LibFeatureCollector::new(tcx);
     intravisit::walk_crate(&mut collector, tcx.hir().krate());
     collector.lib_features

src/librustc/middle/liveness.rs

@@ -181,7 +181,7 @@ impl<'tcx> Visitor<'tcx> for IrMaps<'tcx> {
     fn visit_arm(&mut self, a: &'tcx hir::Arm) { visit_arm(self, a); }
 }
 
-fn check_mod_liveness<'tcx>(tcx: TyCtxt<'tcx>, module_def_id: DefId) {
+fn check_mod_liveness(tcx: TyCtxt<'_>, module_def_id: DefId) {
     tcx.hir().visit_item_likes_in_module(
         module_def_id,
         &mut IrMaps::new(tcx, module_def_id).as_deep_visitor(),

src/librustc/middle/reachable.rs

@@ -42,8 +42,8 @@ fn item_might_be_inlined(tcx: TyCtxt<'tcx>, item: &hir::Item, attrs: CodegenFnAt
     }
 }
 
-fn method_might_be_inlined<'tcx>(
-    tcx: TyCtxt<'tcx>,
+fn method_might_be_inlined(
+    tcx: TyCtxt<'_>,
     impl_item: &hir::ImplItem,
     impl_src: DefId,
 ) -> bool {
@@ -391,7 +391,7 @@ impl<'a, 'tcx> ItemLikeVisitor<'tcx> for CollectPrivateImplItemsVisitor<'a, 'tcx
 #[derive(Clone, HashStable)]
 pub struct ReachableSet(pub Lrc<HirIdSet>);
 
-fn reachable_set<'tcx>(tcx: TyCtxt<'tcx>, crate_num: CrateNum) -> ReachableSet {
+fn reachable_set(tcx: TyCtxt<'_>, crate_num: CrateNum) -> ReachableSet {
     debug_assert!(crate_num == LOCAL_CRATE);
 
     let access_levels = &tcx.privacy_access_levels(LOCAL_CRATE);

src/librustc/middle/region.rs

@@ -1446,7 +1446,7 @@ impl<'tcx> Visitor<'tcx> for RegionResolutionVisitor<'tcx> {
     }
 }
 
-fn region_scope_tree<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId) -> &'tcx ScopeTree {
+fn region_scope_tree(tcx: TyCtxt<'_>, def_id: DefId) -> &ScopeTree {
     let closure_base_def_id = tcx.closure_base_def_id(def_id);
     if closure_base_def_id != def_id {
         return tcx.region_scope_tree(closure_base_def_id);

src/librustc/middle/resolve_lifetime.rs

@@ -368,7 +368,7 @@ pub fn provide(providers: &mut ty::query::Providers<'_>) {
 /// entire crate. You should not read the result of this query
 /// directly, but rather use `named_region_map`, `is_late_bound_map`,
 /// etc.
-fn resolve_lifetimes<'tcx>(tcx: TyCtxt<'tcx>, for_krate: CrateNum) -> &'tcx ResolveLifetimes {
+fn resolve_lifetimes(tcx: TyCtxt<'_>, for_krate: CrateNum) -> &ResolveLifetimes {
     assert_eq!(for_krate, LOCAL_CRATE);
 
     let named_region_map = krate(tcx);
@@ -395,7 +395,7 @@ fn resolve_lifetimes<'tcx>(tcx: TyCtxt<'tcx>, for_krate: CrateNum) -> &'tcx Reso
     tcx.arena.alloc(rl)
 }
 
-fn krate<'tcx>(tcx: TyCtxt<'tcx>) -> NamedRegionMap {
+fn krate(tcx: TyCtxt<'_>) -> NamedRegionMap {
     let krate = tcx.hir().krate();
     let mut map = NamedRegionMap {
         defs: Default::default(),