Revert HirIdify_rustc

This reverts commit c3d2490, reversing
changes made to 68650ca.

src/librustc/infer/error_reporting/mod.rs

@@ -56,6 +56,7 @@ use crate::hir::def_id::DefId;
 use crate::hir::Node;
 use crate::middle::region;
 use std::{cmp, fmt};
+use syntax::ast::DUMMY_NODE_ID;
 use syntax_pos::{Pos, Span};
 use crate::traits::{ObligationCause, ObligationCauseCode};
 use crate::ty::error::TypeError;
@@ -181,8 +182,8 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
         let cm = self.sess.source_map();
 
         let scope = region.free_region_binding_scope(self);
-        let node = self.hir().as_local_hir_id(scope).unwrap_or(hir::DUMMY_HIR_ID);
-        let tag = match self.hir().find_by_hir_id(node) {
+        let node = self.hir().as_local_node_id(scope).unwrap_or(DUMMY_NODE_ID);
+        let tag = match self.hir().find(node) {
             Some(Node::Block(_)) | Some(Node::Expr(_)) => "body",
             Some(Node::Item(it)) => Self::item_scope_tag(&it),
             Some(Node::TraitItem(it)) => Self::trait_item_scope_tag(&it),
@@ -191,7 +192,7 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
         };
         let (prefix, span) = match *region {
             ty::ReEarlyBound(ref br) => {
-                let mut sp = cm.def_span(self.hir().span_by_hir_id(node));
+                let mut sp = cm.def_span(self.hir().span(node));
                 if let Some(param) = self.hir()
                     .get_generics(scope)
                     .and_then(|generics| generics.get_named(&br.name))
@@ -204,7 +205,7 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
                 bound_region: ty::BoundRegion::BrNamed(_, ref name),
                 ..
             }) => {
-                let mut sp = cm.def_span(self.hir().span_by_hir_id(node));
+                let mut sp = cm.def_span(self.hir().span(node));
                 if let Some(param) = self.hir()
                     .get_generics(scope)
                     .and_then(|generics| generics.get_named(&name))
@@ -216,15 +217,15 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
             ty::ReFree(ref fr) => match fr.bound_region {
                 ty::BrAnon(idx) => (
                     format!("the anonymous lifetime #{} defined on", idx + 1),
-                    self.hir().span_by_hir_id(node),
+                    self.hir().span(node),
                 ),
                 ty::BrFresh(_) => (
                     "an anonymous lifetime defined on".to_owned(),
-                    self.hir().span_by_hir_id(node),
+                    self.hir().span(node),
                 ),
                 _ => (
                     format!("the lifetime {} as defined on", fr.bound_region),
-                    cm.def_span(self.hir().span_by_hir_id(node)),
+                    cm.def_span(self.hir().span(node)),
                 ),
             },
             _ => bug!(),
@@ -1450,7 +1451,8 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
                 format!(" for lifetime parameter `{}` in coherence check", name)
             }
             infer::UpvarRegion(ref upvar_id, _) => {
-                let var_name = self.tcx.hir().name_by_hir_id(upvar_id.var_path.hir_id);
+                let var_node_id = self.tcx.hir().hir_to_node_id(upvar_id.var_path.hir_id);
+                let var_name = self.tcx.hir().name(var_node_id);
                 format!(" for capture of `{}` by closure", var_name)
             }
             infer::NLL(..) => bug!("NLL variable found in lexical phase"),

src/librustc/infer/error_reporting/note.rs

@@ -31,7 +31,8 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
                               "...so that reference does not outlive borrowed content");
             }
             infer::ReborrowUpvar(span, ref upvar_id) => {
-                let var_name = self.tcx.hir().name_by_hir_id(upvar_id.var_path.hir_id);
+                let var_node_id = self.tcx.hir().hir_to_node_id(upvar_id.var_path.hir_id);
+                let var_name = self.tcx.hir().name(var_node_id);
                 err.span_note(span,
                               &format!("...so that closure can access `{}`", var_name));
             }
@@ -163,7 +164,8 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
                 err
             }
             infer::ReborrowUpvar(span, ref upvar_id) => {
-                let var_name = self.tcx.hir().name_by_hir_id(upvar_id.var_path.hir_id);
+                let var_node_id = self.tcx.hir().hir_to_node_id(upvar_id.var_path.hir_id);
+                let var_name = self.tcx.hir().name(var_node_id);
                 let mut err = struct_span_err!(self.tcx.sess,
                                                span,
                                                E0313,

src/librustc/middle/reachable.rs

@@ -177,8 +177,8 @@ impl<'a, 'tcx> ReachableContext<'a, 'tcx> {
                             // Check the impl. If the generics on the self
                             // type of the impl require inlining, this method
                             // does too.
-                            let impl_hir_id = self.tcx.hir().as_local_hir_id(impl_did).unwrap();
-                            match self.tcx.hir().expect_item_by_hir_id(impl_hir_id).node {
+                            let impl_node_id = self.tcx.hir().as_local_node_id(impl_did).unwrap();
+                            match self.tcx.hir().expect_item(impl_node_id).node {
                                 hir::ItemKind::Impl(..) => {
                                     let generics = self.tcx.generics_of(impl_did);
                                     generics.requires_monomorphization(self.tcx)

src/librustc/middle/resolve_lifetime.rs

@@ -1248,12 +1248,12 @@ fn extract_labels(ctxt: &mut LifetimeContext<'_, '_>, body: &hir::Body) {
                 } => {
                     // FIXME (#24278): non-hygienic comparison
                     if let Some(def) = lifetimes.get(&hir::ParamName::Plain(label.modern())) {
-                        let hir_id = tcx.hir().as_local_hir_id(def.id().unwrap()).unwrap();
+                        let node_id = tcx.hir().as_local_node_id(def.id().unwrap()).unwrap();
 
                         signal_shadowing_problem(
                             tcx,
                             label.name,
-                            original_lifetime(tcx.hir().span_by_hir_id(hir_id)),
+                            original_lifetime(tcx.hir().span(node_id)),
                             shadower_label(label.span),
                         );
                         return;
@@ -2593,12 +2593,12 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> {
                     ref lifetimes, s, ..
                 } => {
                     if let Some(&def) = lifetimes.get(&param.name.modern()) {
-                        let hir_id = self.tcx.hir().as_local_hir_id(def.id().unwrap()).unwrap();
+                        let node_id = self.tcx.hir().as_local_node_id(def.id().unwrap()).unwrap();
 
                         signal_shadowing_problem(
                             self.tcx,
                             param.name.ident().name,
-                            original_lifetime(self.tcx.hir().span_by_hir_id(hir_id)),
+                            original_lifetime(self.tcx.hir().span(node_id)),
                             shadower_lifetime(&param),
                         );
                         return;

src/librustc/traits/error_reporting.rs

@@ -1035,8 +1035,7 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
                  ).collect::<Vec<_>>())
             }
             Node::StructCtor(ref variant_data) => {
-                (self.tcx.sess.source_map().def_span(
-                    self.tcx.hir().span_by_hir_id(variant_data.hir_id())),
+                (self.tcx.sess.source_map().def_span(self.tcx.hir().span(variant_data.id())),
                  vec![ArgKind::empty(); variant_data.fields().len()])
             }
             _ => panic!("non-FnLike node found: {:?}", node),

src/librustc/traits/util.rs

@@ -525,9 +525,9 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
     }
 
     pub fn impl_is_default(self, node_item_def_id: DefId) -> bool {
-        match self.hir().as_local_hir_id(node_item_def_id) {
-            Some(hir_id) => {
-                let item = self.hir().expect_item_by_hir_id(hir_id);
+        match self.hir().as_local_node_id(node_item_def_id) {
+            Some(node_id) => {
+                let item = self.hir().expect_item(node_id);
                 if let hir::ItemKind::Impl(_, _, defaultness, ..) = item.node {
                     defaultness.is_default()
                 } else {

src/librustc/ty/item_path.rs

@@ -462,8 +462,8 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
         // only occur very early in the compiler pipeline.
         let parent_def_id = self.parent_def_id(impl_def_id).unwrap();
         self.push_item_path(buffer, parent_def_id, pushed_prelude_crate);
-        let hir_id = self.hir().as_local_hir_id(impl_def_id).unwrap();
-        let item = self.hir().expect_item_by_hir_id(hir_id);
+        let node_id = self.hir().as_local_node_id(impl_def_id).unwrap();
+        let item = self.hir().expect_item(node_id);
         let span_str = self.sess.source_map().span_to_string(item.span);
         buffer.push(&format!("<impl at {}>", span_str));
     }

src/librustc/ty/mod.rs

@@ -2939,8 +2939,8 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
 
     /// Get the attributes of a definition.
     pub fn get_attrs(self, did: DefId) -> Attributes<'gcx> {
-        if let Some(id) = self.hir().as_local_hir_id(did) {
-            Attributes::Borrowed(self.hir().attrs_by_hir_id(id))
+        if let Some(id) = self.hir().as_local_node_id(did) {
+            Attributes::Borrowed(self.hir().attrs(id))
         } else {
             Attributes::Owned(self.item_attrs(did))
         }
@@ -2991,8 +2991,8 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
     /// with the name of the crate containing the impl.
     pub fn span_of_impl(self, impl_did: DefId) -> Result<Span, Symbol> {
         if impl_did.is_local() {
-            let hir_id = self.hir().as_local_hir_id(impl_did).unwrap();
-            Ok(self.hir().span_by_hir_id(hir_id))
+            let node_id = self.hir().as_local_node_id(impl_did).unwrap();
+            Ok(self.hir().span(node_id))
         } else {
             Err(self.crate_name(impl_did.krate))
         }
@@ -3110,8 +3110,8 @@ fn adt_sized_constraint<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
 fn associated_item_def_ids<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
                                      def_id: DefId)
                                      -> Lrc<Vec<DefId>> {
-    let id = tcx.hir().as_local_hir_id(def_id).unwrap();
-    let item = tcx.hir().expect_item_by_hir_id(id);
+    let id = tcx.hir().as_local_node_id(def_id).unwrap();
+    let item = tcx.hir().expect_item(id);
     let vec: Vec<_> = match item.node {
         hir::ItemKind::Trait(.., ref trait_item_refs) => {
             trait_item_refs.iter()

src/librustc/util/ppaux.rs

@@ -802,7 +802,7 @@ impl fmt::Debug for ty::UpvarId {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "UpvarId({:?};`{}`;{:?})",
                self.var_path.hir_id,
-               ty::tls::with(|tcx| tcx.hir().name_by_hir_id(self.var_path.hir_id)),
+               ty::tls::with(|tcx| tcx.hir().name(tcx.hir().hir_to_node_id(self.var_path.hir_id))),
                self.closure_expr_id)
     }
 }