Rollup merge of rust-lang#62057 - matthewjasper:deny-unnecessary-outlives, r=Mark-Simulacrum

Deny explicit_outlives_requirements in the compiler

Author: Centril

src/librustc/hir/itemlikevisit.rs

@@ -51,7 +51,7 @@ pub trait ItemLikeVisitor<'hir> {
     fn visit_impl_item(&mut self, impl_item: &'hir ImplItem);
 }
 
-pub struct DeepVisitor<'v, V: 'v> {
+pub struct DeepVisitor<'v, V> {
     visitor: &'v mut V,
 }
 

src/librustc/infer/nll_relate/mod.rs

@@ -800,7 +800,7 @@ impl<'me, 'tcx> TypeVisitor<'tcx> for ScopeInstantiator<'me, 'tcx> {
 /// [blog post]: https://is.gd/0hKvIr
 struct TypeGeneralizer<'me, 'tcx, D>
 where
-    D: TypeRelatingDelegate<'tcx> + 'me,
+    D: TypeRelatingDelegate<'tcx>,
 {
     infcx: &'me InferCtxt<'me, 'tcx>,
 

src/librustc/lib.rs

@@ -31,7 +31,6 @@
 #![deny(rust_2018_idioms)]
 #![deny(internal)]
 #![deny(unused_lifetimes)]
-#![allow(explicit_outlives_requirements)]
 
 #![feature(arbitrary_self_types)]
 #![feature(box_patterns)]

src/librustc/ty/context.rs

@@ -231,7 +231,7 @@ pub struct CommonConsts<'tcx> {
     pub err: &'tcx Const<'tcx>,
 }
 
-pub struct LocalTableInContext<'a, V: 'a> {
+pub struct LocalTableInContext<'a, V> {
     local_id_root: Option<DefId>,
     data: &'a ItemLocalMap<V>
 }
@@ -294,7 +294,7 @@ impl<'a, V> ::std::ops::Index<hir::HirId> for LocalTableInContext<'a, V> {
     }
 }
 
-pub struct LocalTableInContextMut<'a, V: 'a> {
+pub struct LocalTableInContextMut<'a, V> {
     local_id_root: Option<DefId>,
     data: &'a mut ItemLocalMap<V>
 }
@@ -2171,7 +2171,7 @@ impl<'tcx> TyCtxt<'tcx> {
 
 
 /// An entry in an interner.
-struct Interned<'tcx, T: 'tcx+?Sized>(&'tcx T);
+struct Interned<'tcx, T: ?Sized>(&'tcx T);
 
 impl<'tcx, T: 'tcx+?Sized> Clone for Interned<'tcx, T> {
     fn clone(&self) -> Self {

src/librustc/ty/query/plumbing.rs

@@ -89,7 +89,7 @@ macro_rules! profq_query_msg {
 
 /// A type representing the responsibility to execute the job in the `job` field.
 /// This will poison the relevant query if dropped.
-pub(super) struct JobOwner<'a, 'tcx, Q: QueryDescription<'tcx> + 'a> {
+pub(super) struct JobOwner<'a, 'tcx, Q: QueryDescription<'tcx>> {
     cache: &'a Lock<QueryCache<'tcx, Q>>,
     key: Q::Key,
     job: Lrc<QueryJob<'tcx>>,
@@ -230,7 +230,7 @@ pub struct CycleError<'tcx> {
 }
 
 /// The result of `try_get_lock`
-pub(super) enum TryGetJob<'a, 'tcx, D: QueryDescription<'tcx> + 'a> {
+pub(super) enum TryGetJob<'a, 'tcx, D: QueryDescription<'tcx>> {
     /// The query is not yet started. Contains a guard to the cache eventually used to start it.
     NotYetStarted(JobOwner<'a, 'tcx, D>),
 

src/librustc_codegen_llvm/lib.rs

@@ -24,7 +24,6 @@
 #![deny(rust_2018_idioms)]
 #![deny(internal)]
 #![deny(unused_lifetimes)]
-#![allow(explicit_outlives_requirements)]
 
 use back::write::{create_target_machine, create_informational_target_machine};
 use syntax_pos::symbol::Symbol;

src/librustc_codegen_ssa/lib.rs

@@ -15,7 +15,6 @@
 #![deny(rust_2018_idioms)]
 #![deny(internal)]
 #![deny(unused_lifetimes)]
-#![allow(explicit_outlives_requirements)]
 
 #![recursion_limit="256"]
 

src/librustc_mir/dataflow/graphviz.rs

@@ -30,7 +30,7 @@ impl<'a, 'tcx, BD> MirWithFlowState<'tcx> for DataflowBuilder<'a, 'tcx, BD>
     fn flow_state(&self) -> &DataflowState<'tcx, Self::BD> { &self.flow_state.flow_state }
 }
 
-struct Graph<'a, 'tcx, MWF:'a, P> where
+struct Graph<'a, 'tcx, MWF, P> where
     MWF: MirWithFlowState<'tcx>
 {
     mbcx: &'a MWF,

src/librustc_mir/dataflow/mod.rs

@@ -181,7 +181,7 @@ where
 
 struct PropagationContext<'b, 'a, 'tcx, O>
 where
-    O: 'b + BitDenotation<'tcx>,
+    O: BitDenotation<'tcx>,
 {
     builder: &'b mut DataflowAnalysis<'a, 'tcx, O>,
 }

src/librustc_mir/interpret/intern.rs

@@ -21,7 +21,7 @@ use super::{
 };
 use crate::const_eval::{CompileTimeInterpreter, CompileTimeEvalContext};
 
-struct InternVisitor<'rt, 'mir: 'rt, 'tcx: 'rt + 'mir> {
+struct InternVisitor<'rt, 'mir, 'tcx> {
     /// previously encountered safe references
     ref_tracking: &'rt mut RefTracking<(MPlaceTy<'tcx>, Mutability, InternMode)>,
     ecx: &'rt mut CompileTimeEvalContext<'mir, 'tcx>,