Abstract away differences between Vec and ptr::P in HIR

src/librustc/middle/check_match.rs

@@ -517,7 +517,7 @@ fn construct_witness<'a,'tcx>(cx: &MatchCheckCtxt<'a,'tcx>, ctor: &Constructor,
         ty::TyEnum(adt, _) | ty::TyStruct(adt, _)  => {
             let v = adt.variant_of_ctor(ctor);
             if let VariantKind::Struct = v.kind() {
-                let field_pats: Vec<_> = v.fields.iter()
+                let field_pats: hir::HirVec<_> = v.fields.iter()
                     .zip(pats)
                     .filter(|&(_, ref pat)| pat.node != hir::PatWild)
                     .map(|(field, pat)| Spanned {
@@ -540,14 +540,14 @@ fn construct_witness<'a,'tcx>(cx: &MatchCheckCtxt<'a,'tcx>, ctor: &Constructor,
                ty::TyArray(_, n) => match ctor {
                     &Single => {
                         assert_eq!(pats_len, n);
-                        hir::PatVec(pats.collect(), None, vec!())
+                        hir::PatVec(pats.collect(), None, hir::HirVec::new())
                     },
                     _ => unreachable!()
                 },
                 ty::TySlice(_) => match ctor {
                     &Slice(n) => {
                         assert_eq!(pats_len, n);
-                        hir::PatVec(pats.collect(), None, vec!())
+                        hir::PatVec(pats.collect(), None, hir::HirVec::new())
                     },
                     _ => unreachable!()
                 },
@@ -562,7 +562,7 @@ fn construct_witness<'a,'tcx>(cx: &MatchCheckCtxt<'a,'tcx>, ctor: &Constructor,
 
         ty::TyArray(_, len) => {
             assert_eq!(pats_len, len);
-            hir::PatVec(pats.collect(), None, vec![])
+            hir::PatVec(pats.collect(), None, hir::HirVec::new())
         }
 
         _ => {

src/librustc/middle/const_eval.rs

@@ -357,14 +357,14 @@ pub fn const_expr_to_pat(tcx: &ty::ctxt, expr: &Expr, span: Span) -> P<hir::Pat>
 
         hir::ExprVec(ref exprs) => {
             let pats = exprs.iter().map(|expr| const_expr_to_pat(tcx, &**expr, span)).collect();
-            hir::PatVec(pats, None, vec![])
+            hir::PatVec(pats, None, hir::HirVec::new())
         }
 
         hir::ExprPath(_, ref path) => {
             let opt_def = tcx.def_map.borrow().get(&expr.id).map(|d| d.full_def());
             match opt_def {
                 Some(def::DefStruct(..)) =>
-                    hir::PatStruct(path.clone(), vec![], false),
+                    hir::PatStruct(path.clone(), hir::HirVec::new(), false),
                 Some(def::DefVariant(..)) =>
                     hir::PatEnum(path.clone(), None),
                 _ => {

src/librustc/middle/expr_use_visitor.rs

@@ -324,7 +324,7 @@ impl<'d,'t,'a,'tcx> ExprUseVisitor<'d,'t,'a,'tcx> {
         self.delegate.consume(consume_id, consume_span, cmt, mode);
     }
 
-    fn consume_exprs(&mut self, exprs: &Vec<P<hir::Expr>>) {
+    fn consume_exprs(&mut self, exprs: &[P<hir::Expr>]) {
         for expr in exprs {
             self.consume_expr(&**expr);
         }
@@ -651,7 +651,7 @@ impl<'d,'t,'a,'tcx> ExprUseVisitor<'d,'t,'a,'tcx> {
 
     fn walk_struct_expr(&mut self,
                         _expr: &hir::Expr,
-                        fields: &Vec<hir::Field>,
+                        fields: &[hir::Field],
                         opt_with: &Option<P<hir::Expr>>) {
         // Consume the expressions supplying values for each field.
         for field in fields {
@@ -697,7 +697,7 @@ impl<'d,'t,'a,'tcx> ExprUseVisitor<'d,'t,'a,'tcx> {
         self.walk_expr(with_expr);
 
         fn contains_field_named(field: ty::FieldDef,
-                                fields: &Vec<hir::Field>)
+                                fields: &[hir::Field])
                                 -> bool
         {
             fields.iter().any(

src/librustc/middle/infer/error_reporting.rs

@@ -1254,7 +1254,7 @@ impl<'a, 'tcx> Rebuilder<'a, 'tcx> {
         let mut lifetimes = Vec::new();
         for lt in add {
             lifetimes.push(hir::LifetimeDef { lifetime: *lt,
-                                              bounds: Vec::new() });
+                                              bounds: hir::HirVec::new() });
         }
         for lt in &generics.lifetimes {
             if keep.contains(&lt.lifetime.name) ||
@@ -1263,7 +1263,7 @@ impl<'a, 'tcx> Rebuilder<'a, 'tcx> {
             }
         }
         hir::Generics {
-            lifetimes: lifetimes,
+            lifetimes: lifetimes.into(),
             ty_params: ty_params,
             where_clause: where_clause,
         }
@@ -1274,7 +1274,7 @@ impl<'a, 'tcx> Rebuilder<'a, 'tcx> {
                        lifetime: hir::Lifetime,
                        anon_nums: &HashSet<u32>,
                        region_names: &HashSet<ast::Name>)
-                       -> Vec<hir::Arg> {
+                       -> hir::HirVec<hir::Arg> {
         let mut new_inputs = Vec::new();
         for arg in inputs {
             let new_ty = self.rebuild_arg_ty_or_output(&*arg.ty, lifetime,
@@ -1286,7 +1286,7 @@ impl<'a, 'tcx> Rebuilder<'a, 'tcx> {
             };
             new_inputs.push(possibly_new_arg);
         }
-        new_inputs
+        new_inputs.into()
     }
 
     fn rebuild_output(&self, ty: &hir::FunctionRetTy,
@@ -1513,7 +1513,7 @@ impl<'a, 'tcx> Rebuilder<'a, 'tcx> {
                     }
                 });
                 hir::AngleBracketedParameters(hir::AngleBracketedParameterData {
-                    lifetimes: new_lts,
+                    lifetimes: new_lts.into(),
                     types: new_types,
                     bindings: new_bindings,
                })
@@ -1529,7 +1529,7 @@ impl<'a, 'tcx> Rebuilder<'a, 'tcx> {
         hir::Path {
             span: path.span,
             global: path.global,
-            segments: new_segs
+            segments: new_segs.into()
         }
     }
 }

src/librustc/middle/resolve_lifetime.rs

@@ -79,10 +79,10 @@ struct LifetimeContext<'a> {
 enum ScopeChain<'a> {
     /// EarlyScope(i, ['a, 'b, ...], s) extends s with early-bound
     /// lifetimes, assigning indexes 'a => i, 'b => i+1, ... etc.
-    EarlyScope(subst::ParamSpace, &'a Vec<hir::LifetimeDef>, Scope<'a>),
+    EarlyScope(subst::ParamSpace, &'a [hir::LifetimeDef], Scope<'a>),
     /// LateScope(['a, 'b, ...], s) extends s with late-bound
     /// lifetimes introduced by the declaration binder_id.
-    LateScope(&'a Vec<hir::LifetimeDef>, Scope<'a>),
+    LateScope(&'a [hir::LifetimeDef], Scope<'a>),
 
     /// lifetimes introduced by a fn are scoped to the call-site for that fn.
     FnScope { fn_id: ast::NodeId, body_id: ast::NodeId, s: Scope<'a> },
@@ -206,7 +206,7 @@ impl<'a, 'v> Visitor<'v> for LifetimeContext<'a> {
                 // a trait ref, which introduces a binding scope.
                 match self.def_map.get(&ty.id).map(|d| (d.base_def, d.depth)) {
                     Some((def::DefTrait(..), 0)) => {
-                        self.with(LateScope(&Vec::new(), self.scope), |_, this| {
+                        self.with(LateScope(&[], self.scope), |_, this| {
                             this.visit_path(path, ty.id);
                         });
                     }
@@ -661,7 +661,7 @@ impl<'a> LifetimeContext<'a> {
                     lifetime_ref.name);
     }
 
-    fn check_lifetime_defs(&mut self, old_scope: Scope, lifetimes: &Vec<hir::LifetimeDef>) {
+    fn check_lifetime_defs(&mut self, old_scope: Scope, lifetimes: &[hir::LifetimeDef]) {
         for i in 0..lifetimes.len() {
             let lifetime_i = &lifetimes[i];
 
@@ -753,7 +753,7 @@ impl<'a> LifetimeContext<'a> {
     }
 }
 
-fn search_lifetimes<'a>(lifetimes: &'a Vec<hir::LifetimeDef>,
+fn search_lifetimes<'a>(lifetimes: &'a [hir::LifetimeDef],
                     lifetime_ref: &hir::Lifetime)
                     -> Option<(u32, &'a hir::Lifetime)> {
     for (i, lifetime_decl) in lifetimes.iter().enumerate() {

src/librustc/middle/stability.rs

@@ -82,7 +82,7 @@ struct Annotator<'a, 'tcx: 'a> {
 impl<'a, 'tcx: 'a> Annotator<'a, 'tcx> {
     // Determine the stability for a node based on its attributes and inherited
     // stability. The stability is recorded in the index and used as the parent.
-    fn annotate<F>(&mut self, id: NodeId, attrs: &Vec<Attribute>,
+    fn annotate<F>(&mut self, id: NodeId, attrs: &[Attribute],
                    item_sp: Span, kind: AnnotationKind, visit_children: F)
         where F: FnOnce(&mut Annotator)
     {

src/librustc_front/fold.rs

@@ -34,7 +34,7 @@ pub trait Folder : Sized {
         noop_fold_crate(c, self)
     }
 
-    fn fold_meta_items(&mut self, meta_items: Vec<P<MetaItem>>) -> Vec<P<MetaItem>> {
+    fn fold_meta_items(&mut self, meta_items: HirVec<P<MetaItem>>) -> HirVec<P<MetaItem>> {
         noop_fold_meta_items(meta_items, self)
     }
 
@@ -198,11 +198,11 @@ pub trait Folder : Sized {
         noop_fold_variant_data(vdata, self)
     }
 
-    fn fold_lifetimes(&mut self, lts: Vec<Lifetime>) -> Vec<Lifetime> {
+    fn fold_lifetimes(&mut self, lts: HirVec<Lifetime>) -> HirVec<Lifetime> {
         noop_fold_lifetimes(lts, self)
     }
 
-    fn fold_lifetime_defs(&mut self, lts: Vec<LifetimeDef>) -> Vec<LifetimeDef> {
+    fn fold_lifetime_defs(&mut self, lts: HirVec<LifetimeDef>) -> HirVec<LifetimeDef> {
         noop_fold_lifetime_defs(lts, self)
     }
 
@@ -263,9 +263,9 @@ pub trait Folder : Sized {
     }
 }
 
-pub fn noop_fold_meta_items<T: Folder>(meta_items: Vec<P<MetaItem>>,
+pub fn noop_fold_meta_items<T: Folder>(meta_items: HirVec<P<MetaItem>>,
                                        fld: &mut T)
-                                       -> Vec<P<MetaItem>> {
+                                       -> HirVec<P<MetaItem>> {
     meta_items.move_map(|x| fld.fold_meta_item(x))
 }
 
@@ -304,7 +304,7 @@ pub fn noop_fold_view_path<T: Folder>(view_path: P<ViewPath>, fld: &mut T) -> P<
     })
 }
 
-pub fn fold_attrs<T: Folder>(attrs: Vec<Attribute>, fld: &mut T) -> Vec<Attribute> {
+pub fn fold_attrs<T: Folder>(attrs: HirVec<Attribute>, fld: &mut T) -> HirVec<Attribute> {
     attrs.move_flat_map(|x| fld.fold_attribute(x))
 }
 
@@ -477,7 +477,7 @@ pub fn noop_fold_local<T: Folder>(l: P<Local>, fld: &mut T) -> P<Local> {
             pat: fld.fold_pat(pat),
             init: init.map(|e| fld.fold_expr(e)),
             span: fld.new_span(span),
-            attrs: attrs.map_thin_attrs(|attrs| fold_attrs(attrs, fld)),
+            attrs: attrs.map_thin_attrs(|attrs| fold_attrs(attrs.into(), fld).into()),
         }
     })
 }
@@ -596,11 +596,13 @@ pub fn noop_fold_lifetime_def<T: Folder>(l: LifetimeDef, fld: &mut T) -> Lifetim
     }
 }
 
-pub fn noop_fold_lifetimes<T: Folder>(lts: Vec<Lifetime>, fld: &mut T) -> Vec<Lifetime> {
+pub fn noop_fold_lifetimes<T: Folder>(lts: HirVec<Lifetime>, fld: &mut T) -> HirVec<Lifetime> {
     lts.move_map(|l| fld.fold_lifetime(l))
 }
 
-pub fn noop_fold_lifetime_defs<T: Folder>(lts: Vec<LifetimeDef>, fld: &mut T) -> Vec<LifetimeDef> {
+pub fn noop_fold_lifetime_defs<T: Folder>(lts: HirVec<LifetimeDef>,
+                                          fld: &mut T)
+                                          -> HirVec<LifetimeDef> {
     lts.move_map(|l| fld.fold_lifetime_def(l))
 }
 
@@ -1139,7 +1141,7 @@ pub fn noop_fold_expr<T: Folder>(Expr { id, node, span, attrs }: Expr, folder: &
             }
         },
         span: folder.new_span(span),
-        attrs: attrs.map_thin_attrs(|attrs| fold_attrs(attrs, folder)),
+        attrs: attrs.map_thin_attrs(|attrs| fold_attrs(attrs.into(), folder).into()),
     }
 }