Use Idents for associated type bindings in HIR

Author: petrochenkov

src/librustc/hir/intravisit.rs

@@ -651,7 +651,7 @@ pub fn walk_path_parameters<'v, V: Visitor<'v>>(visitor: &mut V,
 pub fn walk_assoc_type_binding<'v, V: Visitor<'v>>(visitor: &mut V,
                                                    type_binding: &'v TypeBinding) {
     visitor.visit_id(type_binding.id);
-    visitor.visit_name(type_binding.span, type_binding.name);
+    visitor.visit_ident(type_binding.ident);
     visitor.visit_ty(&type_binding.ty);
 }
 

src/librustc/hir/lowering.rs

@@ -1008,7 +1008,7 @@ impl<'a> LoweringContext<'a> {
     fn lower_ty_binding(&mut self, b: &TypeBinding, itctx: ImplTraitContext) -> hir::TypeBinding {
         hir::TypeBinding {
             id: self.lower_node_id(b.id).node_id,
-            name: self.lower_ident(b.ident),
+            ident: b.ident,
             ty: self.lower_ty(&b.ty, itctx),
             span: b.span,
         }
@@ -1676,7 +1676,7 @@ impl<'a> LoweringContext<'a> {
                         bindings: hir_vec![
                             hir::TypeBinding {
                                 id: this.next_id().node_id,
-                                name: Symbol::intern(FN_OUTPUT_NAME),
+                                ident: Ident::from_str(FN_OUTPUT_NAME),
                                 ty: output
                                     .as_ref()
                                     .map(|ty| this.lower_ty(&ty, DISALLOWED))

src/librustc/hir/mod.rs

@@ -1660,7 +1660,7 @@ pub enum ImplItemKind {
 #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
 pub struct TypeBinding {
     pub id: NodeId,
-    pub name: Name,
+    pub ident: Ident,
     pub ty: P<Ty>,
     pub span: Span,
 }

src/librustc/hir/print.rs

@@ -1715,7 +1715,7 @@ impl<'a> State<'a> {
 
             for binding in parameters.bindings.iter() {
                 start_or_comma(self)?;
-                self.print_name(binding.name)?;
+                self.print_ident(binding.ident)?;
                 self.s.space()?;
                 self.word_space("=")?;
                 self.print_type(&binding.ty)?;

src/librustc/ich/impls_hir.rs

@@ -268,7 +268,7 @@ impl_stable_hash_for!(struct hir::MethodSig {
 
 impl_stable_hash_for!(struct hir::TypeBinding {
     id,
-    name,
+    ident,
     ty,
     span
 });

src/librustc/traits/project.rs

@@ -31,6 +31,7 @@ use infer::type_variable::TypeVariableOrigin;
 use middle::const_val::ConstVal;
 use mir::interpret::{GlobalId};
 use rustc_data_structures::snapshot_map::{Snapshot, SnapshotMap};
+use syntax::ast::Ident;
 use syntax::symbol::Symbol;
 use ty::subst::{Subst, Substs};
 use ty::{self, ToPredicate, ToPolyTraitRef, Ty, TyCtxt};
@@ -1452,7 +1453,7 @@ fn confirm_callable_candidate<'cx, 'gcx, 'tcx>(
                 projection_ty: ty::ProjectionTy::from_ref_and_name(
                     tcx,
                     trait_ref,
-                    Symbol::intern(FN_OUTPUT_NAME),
+                    Ident::from_str(FN_OUTPUT_NAME),
                 ),
                 ty: ret_type
             }
@@ -1546,7 +1547,7 @@ fn assoc_ty_def<'cx, 'gcx, 'tcx>(
     let impl_node = specialization_graph::Node::Impl(impl_def_id);
     for item in impl_node.items(tcx) {
         if item.kind == ty::AssociatedKind::Type &&
-                tcx.hygienic_eq(item.name, assoc_ty_name, trait_def_id) {
+                tcx.hygienic_eq(item.name.to_ident(), assoc_ty_name.to_ident(), trait_def_id) {
             return specialization_graph::NodeItem {
                 node: specialization_graph::Node::Impl(impl_def_id),
                 item,

src/librustc/traits/specialize/specialization_graph.rs

@@ -379,7 +379,7 @@ impl<'a, 'gcx, 'tcx> Ancestors {
         self.flat_map(move |node| {
             node.items(tcx).filter(move |impl_item| {
                 impl_item.kind == trait_item_kind &&
-                tcx.hygienic_eq(impl_item.name, trait_item_name, trait_def_id)
+                tcx.hygienic_eq(impl_item.name.to_ident(), trait_item_name.to_ident(), trait_def_id)
             }).map(move |item| NodeItem { node: node, item: item })
         })
     }

src/librustc/ty/mod.rs

@@ -2720,9 +2720,8 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
     // Hygienically compare a use-site name (`use_name`) for a field or an associated item with its
     // supposed definition name (`def_name`). The method also needs `DefId` of the supposed
     // definition's parent/scope to perform comparison.
-    pub fn hygienic_eq(self, use_name: Name, def_name: Name, def_parent_def_id: DefId) -> bool {
-        let (use_ident, def_ident) = (use_name.to_ident(), def_name.to_ident());
-        self.adjust_ident(use_ident, def_parent_def_id, DUMMY_NODE_ID).0 == def_ident
+    pub fn hygienic_eq(self, use_name: Ident, def_name: Ident, def_parent_def_id: DefId) -> bool {
+        self.adjust_ident(use_name, def_parent_def_id, DUMMY_NODE_ID).0 == def_name.modern()
     }
 
     pub fn adjust_ident(self, mut ident: Ident, scope: DefId, block: NodeId) -> (Ident, DefId) {

src/librustc/ty/sty.rs

@@ -25,7 +25,7 @@ use mir::interpret::{Scalar, Pointer, Value, ConstValue};
 use std::iter;
 use std::cmp::Ordering;
 use rustc_target::spec::abi;
-use syntax::ast::{self, Name};
+use syntax::ast::{self, Ident};
 use syntax::symbol::{keywords, InternedString};
 
 use serialize;
@@ -851,11 +851,11 @@ impl<'a, 'tcx> ProjectionTy<'tcx> {
     /// Construct a ProjectionTy by searching the trait from trait_ref for the
     /// associated item named item_name.
     pub fn from_ref_and_name(
-        tcx: TyCtxt, trait_ref: ty::TraitRef<'tcx>, item_name: Name
+        tcx: TyCtxt, trait_ref: ty::TraitRef<'tcx>, item_name: Ident
     ) -> ProjectionTy<'tcx> {
         let item_def_id = tcx.associated_items(trait_ref.def_id).find(|item| {
             item.kind == ty::AssociatedKind::Type &&
-            tcx.hygienic_eq(item_name, item.name, trait_ref.def_id)
+            tcx.hygienic_eq(item_name, item.name.to_ident(), trait_ref.def_id)
         }).unwrap().def_id;
 
         ProjectionTy {

src/librustc_traits/lowering.rs

@@ -332,7 +332,7 @@ pub fn program_clauses_for_associated_type_value<'a, 'tcx>(
     let mut where_clauses = vec![trait_implemented];
     where_clauses.extend(item_where_clauses);
     // `<A0 as Trait<A1..An>>::AssocType<Pn+1..Pm>`
-    let projection_ty = ty::ProjectionTy::from_ref_and_name(tcx, trait_ref, item.name);
+    let projection_ty = ty::ProjectionTy::from_ref_and_name(tcx, trait_ref, item.name.to_ident());
     // `Normalize(<A0 as Trait<A1..An>>::AssocType<Pn+1..Pm> -> T)`
     let normalize_goal = DomainGoal::Normalize(ty::ProjectionPredicate { projection_ty, ty });
     // `Normalize(... -> T) :- ...`

src/librustc_typeck/astconv.rs

@@ -84,7 +84,7 @@ pub trait AstConv<'gcx, 'tcx> {
 }
 
 struct ConvertedBinding<'tcx> {
-    item_name: ast::Name,
+    item_name: ast::Ident,
     ty: Ty<'tcx>,
     span: Span,
 }
@@ -333,7 +333,7 @@ impl<'o, 'gcx: 'tcx, 'tcx> AstConv<'gcx, 'tcx>+'o {
 
         let assoc_bindings = parameters.bindings.iter().map(|binding| {
             ConvertedBinding {
-                item_name: binding.name,
+                item_name: binding.ident,
                 ty: self.ast_ty_to_ty(&binding.ty),
                 span: binding.span,
             }
@@ -475,12 +475,12 @@ impl<'o, 'gcx: 'tcx, 'tcx> AstConv<'gcx, 'tcx>+'o {
 
     fn trait_defines_associated_type_named(&self,
                                            trait_def_id: DefId,
-                                           assoc_name: ast::Name)
+                                           assoc_name: ast::Ident)
                                            -> bool
     {
         self.tcx().associated_items(trait_def_id).any(|item| {
             item.kind == ty::AssociatedKind::Type &&
-            self.tcx().hygienic_eq(assoc_name, item.name, trait_def_id)
+            self.tcx().hygienic_eq(assoc_name, item.name.to_ident(), trait_def_id)
         })
     }
 
@@ -559,7 +559,7 @@ impl<'o, 'gcx: 'tcx, 'tcx> AstConv<'gcx, 'tcx>+'o {
         }?;
 
         let (assoc_ident, def_scope) =
-            tcx.adjust_ident(binding.item_name.to_ident(), candidate.def_id(), ref_id);
+            tcx.adjust_ident(binding.item_name, candidate.def_id(), ref_id);
         let assoc_ty = tcx.associated_items(candidate.def_id()).find(|i| {
             i.kind == ty::AssociatedKind::Type && i.name.to_ident() == assoc_ident
         }).expect("missing associated type");
@@ -768,7 +768,7 @@ impl<'o, 'gcx: 'tcx, 'tcx> AstConv<'gcx, 'tcx>+'o {
     // any ambiguity.
     fn find_bound_for_assoc_item(&self,
                                  ty_param_def_id: DefId,
-                                 assoc_name: ast::Name,
+                                 assoc_name: ast::Ident,
                                  span: Span)
                                  -> Result<ty::PolyTraitRef<'tcx>, ErrorReported>
     {
@@ -797,7 +797,7 @@ impl<'o, 'gcx: 'tcx, 'tcx> AstConv<'gcx, 'tcx>+'o {
     fn one_bound_for_assoc_type<I>(&self,
                                 mut bounds: I,
                                 ty_param_name: &str,
-                                assoc_name: ast::Name,
+                                assoc_name: ast::Ident,
                                 span: Span)
         -> Result<ty::PolyTraitRef<'tcx>, ErrorReported>
         where I: Iterator<Item=ty::PolyTraitRef<'tcx>>
@@ -827,7 +827,7 @@ impl<'o, 'gcx: 'tcx, 'tcx> AstConv<'gcx, 'tcx>+'o {
             for bound in bounds {
                 let bound_span = self.tcx().associated_items(bound.def_id()).find(|item| {
                     item.kind == ty::AssociatedKind::Type &&
-                    self.tcx().hygienic_eq(assoc_name, item.name, bound.def_id())
+                    self.tcx().hygienic_eq(assoc_name, item.name.to_ident(), bound.def_id())
                 })
                 .and_then(|item| self.tcx().hir.span_if_local(item.def_id));
 
@@ -863,7 +863,7 @@ impl<'o, 'gcx: 'tcx, 'tcx> AstConv<'gcx, 'tcx>+'o {
                                      -> (Ty<'tcx>, Def)
     {
         let tcx = self.tcx();
-        let assoc_name = item_segment.name;
+        let assoc_name = item_segment.name.to_ident();
 
         debug!("associated_path_def_to_ty: {:?}::{}", ty, assoc_name);
 
@@ -885,8 +885,7 @@ impl<'o, 'gcx: 'tcx, 'tcx> AstConv<'gcx, 'tcx>+'o {
 
                 let candidates =
                     traits::supertraits(tcx, ty::Binder::bind(trait_ref))
-                    .filter(|r| self.trait_defines_associated_type_named(r.def_id(),
-                                                                         assoc_name));
+                    .filter(|r| self.trait_defines_associated_type_named(r.def_id(), assoc_name));
 
                 match self.one_bound_for_assoc_type(candidates, "Self", assoc_name, span) {
                     Ok(bound) => bound,
@@ -913,7 +912,7 @@ impl<'o, 'gcx: 'tcx, 'tcx> AstConv<'gcx, 'tcx>+'o {
         };
 
         let trait_did = bound.def_id();
-        let (assoc_ident, def_scope) = tcx.adjust_ident(assoc_name.to_ident(), trait_did, ref_id);
+        let (assoc_ident, def_scope) = tcx.adjust_ident(assoc_name, trait_did, ref_id);
         let item = tcx.associated_items(trait_did).find(|i| {
             Namespace::from(i.kind) == Namespace::Type &&
             i.name.to_ident() == assoc_ident

src/librustc_typeck/check/autoderef.rs

@@ -21,7 +21,7 @@ use rustc::ty::{ToPredicate, TypeFoldable};
 use rustc::ty::adjustment::{Adjustment, Adjust, OverloadedDeref};
 
 use syntax_pos::Span;
-use syntax::symbol::Symbol;
+use syntax::ast::Ident;
 
 use std::iter;
 
@@ -134,7 +134,7 @@ impl<'a, 'gcx, 'tcx> Autoderef<'a, 'gcx, 'tcx> {
                                                               ty::ProjectionTy::from_ref_and_name(
                                                                   tcx,
                                                                   trait_ref,
-                                                                  Symbol::intern("Target"),
+                                                                  Ident::from_str("Target"),
                                                               ),
                                                               cause,
                                                               0,

src/librustc_typeck/check/method/mod.rs

@@ -387,8 +387,9 @@ impl<'a, 'gcx, 'tcx> FnCtxt<'a, 'gcx, 'tcx> {
     /// and return it, or `None`, if no such item was defined there.
     pub fn associated_item(&self, def_id: DefId, item_name: ast::Name, ns: Namespace)
                            -> Option<ty::AssociatedItem> {
-        self.tcx.associated_items(def_id)
-                .find(|item| Namespace::from(item.kind) == ns &&
-                             self.tcx.hygienic_eq(item_name, item.name, def_id))
+        self.tcx.associated_items(def_id).find(|item| {
+            Namespace::from(item.kind) == ns &&
+            self.tcx.hygienic_eq(item_name.to_ident(), item.name.to_ident(), def_id)
+        })
     }
 }

src/librustc_typeck/check/mod.rs

@@ -1398,11 +1398,13 @@ fn check_impl_items_against_trait<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
         let ty_impl_item = tcx.associated_item(tcx.hir.local_def_id(impl_item.id));
         let ty_trait_item = tcx.associated_items(impl_trait_ref.def_id)
             .find(|ac| Namespace::from(&impl_item.node) == Namespace::from(ac.kind) &&
-                         tcx.hygienic_eq(ty_impl_item.name, ac.name, impl_trait_ref.def_id))
+                         tcx.hygienic_eq(ty_impl_item.name.to_ident(), ac.name.to_ident(),
+                                         impl_trait_ref.def_id))
             .or_else(|| {
                 // Not compatible, but needed for the error message
                 tcx.associated_items(impl_trait_ref.def_id)
-                   .find(|ac| tcx.hygienic_eq(ty_impl_item.name, ac.name, impl_trait_ref.def_id))
+                   .find(|ac| tcx.hygienic_eq(ty_impl_item.name.to_ident(), ac.name.to_ident(),
+                                              impl_trait_ref.def_id))
             });
 
         // Check that impl definition matches trait definition

src/librustdoc/clean/mod.rs

@@ -4202,7 +4202,7 @@ pub struct TypeBinding {
 impl Clean<TypeBinding> for hir::TypeBinding {
     fn clean(&self, cx: &DocContext) -> TypeBinding {
         TypeBinding {
-            name: self.name.clean(cx),
+            name: self.ident.name.clean(cx),
             ty: self.ty.clean(cx)
         }
     }