Get rid of hir::StructFieldKind

src/librustc/front/map/collector.rs

@@ -151,7 +151,7 @@ fn visit_item(&mut self, i: &'ast Item) {
                         self.create_def_with_parent(
                             Some(variant_def_index),
                             field.node.id,
-                            DefPathData::Field(field.node.kind));
+                            DefPathData::Field(field.node.name));
                     }
                 }
             }
@@ -166,7 +166,7 @@ fn visit_item(&mut self, i: &'ast Item) {
                 }
 
                 for field in struct_def.fields() {
-                    self.create_def(field.node.id, DefPathData::Field(field.node.kind));
+                    self.create_def(field.node.id, DefPathData::Field(field.node.name));
                 }
             }
             ItemTrait(_, _, ref bounds, _) => {

src/librustc/front/map/definitions.rs

@@ -11,7 +11,6 @@
 use middle::cstore::LOCAL_CRATE;
 use middle::def_id::{DefId, DefIndex};
 use rustc_data_structures::fnv::FnvHashMap;
-use rustc_front::hir;
 use syntax::ast;
 use syntax::parse::token::InternedString;
 use util::nodemap::NodeMap;
@@ -84,8 +83,7 @@ pub enum DefPathData {
     TypeParam(ast::Name),
     LifetimeDef(ast::Name),
     EnumVariant(ast::Name),
-    PositionalField,
-    Field(hir::StructFieldKind),
+    Field(Option<ast::Name>),
     StructCtor, // implicit ctor for a tuple-like struct
     Initializer, // initializer for a const
     Binding(ast::Name), // pattern binding
@@ -186,16 +184,12 @@ pub fn as_interned_str(&self) -> InternedString {
             LifetimeDef(name) |
             EnumVariant(name) |
             DetachedCrate(name) |
-            Binding(name) => {
+            Binding(name) |
+            Field(Some(name)) => {
                 name.as_str()
             }
 
-            Field(hir::StructFieldKind::NamedField(name, _)) => {
-                name.as_str()
-            }
-
-            PositionalField |
-            Field(hir::StructFieldKind::UnnamedField(_)) => {
+            Field(None) => {
                 InternedString::new("{{field}}")
             }
 

src/librustc/middle/dead.rs

@@ -221,10 +221,7 @@ fn visit_variant_data(&mut self, def: &hir::VariantData, _: ast::Name,
         let has_extern_repr = self.struct_has_extern_repr;
         let inherited_pub_visibility = self.inherited_pub_visibility;
         let live_fields = def.fields().iter().filter(|f| {
-            has_extern_repr || inherited_pub_visibility || match f.node.kind {
-                hir::NamedField(_, hir::Public) => true,
-                _ => false
-            }
+            has_extern_repr || inherited_pub_visibility || f.node.vis == hir::Public
         });
         self.live_symbols.extend(live_fields.map(|f| f.node.id));
 
@@ -432,7 +429,7 @@ fn should_warn_about_item(&mut self, item: &hir::Item) -> bool {
     }
 
     fn should_warn_about_field(&mut self, node: &hir::StructField_) -> bool {
-        let is_named = node.name().is_some();
+        let is_named = node.name.is_some();
         let field_type = self.tcx.node_id_to_type(node.id);
         let is_marker_field = match field_type.ty_to_def_id() {
             Some(def_id) => self.tcx.lang_items.items().iter().any(|item| *item == Some(def_id)),
@@ -549,7 +546,7 @@ fn visit_foreign_item(&mut self, fi: &hir::ForeignItem) {
     fn visit_struct_field(&mut self, field: &hir::StructField) {
         if self.should_warn_about_field(&field.node) {
             self.warn_dead_code(field.node.id, field.span,
-                                field.node.name().unwrap(), "struct field");
+                                field.node.name.unwrap(), "struct field");
         }
 
         intravisit::walk_struct_field(self, field);

src/librustc_front/fold.rs

@@ -700,11 +700,12 @@ pub fn noop_fold_poly_trait_ref<T: Folder>(p: PolyTraitRef, fld: &mut T) -> Poly
 }
 
 pub fn noop_fold_struct_field<T: Folder>(f: StructField, fld: &mut T) -> StructField {
-    let StructField {node: StructField_ {id, kind, ty, attrs}, span} = f;
+    let StructField {node: StructField_ {id, name, vis, ty, attrs}, span} = f;
     Spanned {
         node: StructField_ {
             id: fld.new_id(id),
-            kind: kind,
+            name: name,
+            vis: vis,
             ty: fld.fold_ty(ty),
             attrs: fold_attrs(attrs, fld),
         },

src/librustc_front/hir.rs

@@ -24,7 +24,6 @@
 pub use self::PathListItem_::*;
 pub use self::PrimTy::*;
 pub use self::Stmt_::*;
-pub use self::StructFieldKind::*;
 pub use self::TraitItem_::*;
 pub use self::Ty_::*;
 pub use self::TyParamBound::*;
@@ -1243,44 +1242,45 @@ pub fn inherit_from(&self, parent_visibility: Visibility) -> Visibility {
 
 #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
 pub struct StructField_ {
-    pub kind: StructFieldKind,
+    pub name: Option<Name>,
+    pub vis: Visibility,
     pub id: NodeId,
     pub ty: P<Ty>,
     pub attrs: HirVec<Attribute>,
 }
 
-impl StructField_ {
-    pub fn name(&self) -> Option<Name> {
-        match self.kind {
-            NamedField(name, _) => Some(name),
-            UnnamedField(_) => None,
-        }
-    }
-}
+// impl StructField_ {
+//     pub fn name(&self) -> Option<Name> {
+//         match self.kind {
+//             NamedField(name, _) => Some(name),
+//             UnnamedField(_) => None,
+//         }
+//     }
+// }
 
 pub type StructField = Spanned<StructField_>;
 
-#[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug, Copy)]
-pub enum StructFieldKind {
-    NamedField(Name, Visibility),
-    /// Element of a tuple-like struct
-    UnnamedField(Visibility),
-}
-
-impl StructFieldKind {
-    pub fn is_unnamed(&self) -> bool {
-        match *self {
-            UnnamedField(..) => true,
-            NamedField(..) => false,
-        }
-    }
-
-    pub fn visibility(&self) -> Visibility {
-        match *self {
-            NamedField(_, vis) | UnnamedField(vis) => vis,
-        }
-    }
-}
+// #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug, Copy)]
+// pub enum StructFieldKind {
+//     NamedField(Name, Visibility),
+//     /// Element of a tuple-like struct
+//     UnnamedField(Visibility),
+// }
+
+// impl StructFieldKind {
+//     pub fn is_unnamed(&self) -> bool {
+//         match *self {
+//             UnnamedField(..) => true,
+//             NamedField(..) => false,
+//         }
+//     }
+
+//     pub fn visibility(&self) -> Visibility {
+//         match *self {
+//             NamedField(_, vis) | UnnamedField(vis) => vis,
+//         }
+//     }
+// }
 
 /// Fields and Ids of enum variants and structs
 ///

src/librustc_front/intravisit.rs

@@ -669,7 +669,7 @@ pub fn walk_struct_def<'v, V: Visitor<'v>>(visitor: &mut V, struct_definition: &
 }
 
 pub fn walk_struct_field<'v, V: Visitor<'v>>(visitor: &mut V, struct_field: &'v StructField) {
-    walk_opt_name(visitor, struct_field.span, struct_field.node.name());
+    walk_opt_name(visitor, struct_field.span, struct_field.node.name);
     visitor.visit_ty(&struct_field.node.ty);
     walk_list!(visitor, visit_attribute, &struct_field.node.attrs);
 }

src/librustc_front/lowering.rs

@@ -611,7 +611,8 @@ pub fn lower_struct_field(lctx: &LoweringContext, f: &StructField) -> hir::Struc
     Spanned {
         node: hir::StructField_ {
             id: f.node.id,
-            kind: lower_struct_field_kind(lctx, &f.node.kind),
+            name: f.node.ident().map(|ident| ident.name),
+            vis: lower_visibility(lctx, f.node.kind.visibility()),
             ty: lower_ty(lctx, &f.node.ty),
             attrs: lower_attrs(lctx, &f.node.attrs),
         },
@@ -1589,15 +1590,6 @@ pub fn lower_binding_mode(lctx: &LoweringContext, b: &BindingMode) -> hir::Bindi
     }
 }
 
-pub fn lower_struct_field_kind(lctx: &LoweringContext,
-                               s: &StructFieldKind)
-                               -> hir::StructFieldKind {
-    match *s {
-        NamedField(ident, vis) => hir::NamedField(ident.name, lower_visibility(lctx, vis)),
-        UnnamedField(vis) => hir::UnnamedField(lower_visibility(lctx, vis)),
-    }
-}
-
 pub fn lower_unsafe_source(_lctx: &LoweringContext, u: UnsafeSource) -> hir::UnsafeSource {
     match u {
         CompilerGenerated => hir::CompilerGenerated,

src/librustc_front/print/pprust.rs

@@ -915,14 +915,9 @@ pub fn print_struct(&mut self,
             if struct_def.is_tuple() {
                 try!(self.popen());
                 try!(self.commasep(Inconsistent, struct_def.fields(), |s, field| {
-                    match field.node.kind {
-                        hir::NamedField(..) => panic!("unexpected named field"),
-                        hir::UnnamedField(vis) => {
-                            try!(s.print_visibility(vis));
-                            try!(s.maybe_print_comment(field.span.lo));
-                            s.print_type(&field.node.ty)
-                        }
-                    }
+                    try!(s.print_visibility(field.node.vis));
+                    try!(s.maybe_print_comment(field.span.lo));
+                    s.print_type(&field.node.ty)
                 }));
                 try!(self.pclose());
             }
@@ -939,19 +934,14 @@ pub fn print_struct(&mut self,
             try!(self.hardbreak_if_not_bol());
 
             for field in struct_def.fields() {
-                match field.node.kind {
-                    hir::UnnamedField(..) => panic!("unexpected unnamed field"),
-                    hir::NamedField(name, visibility) => {
-                        try!(self.hardbreak_if_not_bol());
-                        try!(self.maybe_print_comment(field.span.lo));
-                        try!(self.print_outer_attributes(&field.node.attrs));
-                        try!(self.print_visibility(visibility));
-                        try!(self.print_name(name));
-                        try!(self.word_nbsp(":"));
-                        try!(self.print_type(&field.node.ty));
-                        try!(word(&mut self.s, ","));
-                    }
-                }
+                try!(self.hardbreak_if_not_bol());
+                try!(self.maybe_print_comment(field.span.lo));
+                try!(self.print_outer_attributes(&field.node.attrs));
+                try!(self.print_visibility(field.node.vis));
+                try!(self.print_name(field.node.name.unwrap()));
+                try!(self.word_nbsp(":"));
+                try!(self.print_type(&field.node.ty));
+                try!(word(&mut self.s, ","));
             }
 
             self.bclose(span)

src/librustc_lint/bad_style.rs

@@ -283,7 +283,7 @@ fn check_pat(&mut self, cx: &LateContext, p: &hir::Pat) {
     fn check_struct_def(&mut self, cx: &LateContext, s: &hir::VariantData,
                         _: ast::Name, _: &hir::Generics, _: ast::NodeId) {
         for sf in s.fields() {
-            if let hir::StructField_ { kind: hir::NamedField(name, _), .. } = sf.node {
+            if let Some(name) = sf.node.name {
                 self.check_snake_case(cx, "structure field", &name.as_str(),
                                       Some(sf.span));
             }

src/librustc_lint/builtin.rs

@@ -428,8 +428,8 @@ fn check_impl_item(&mut self, cx: &LateContext, impl_item: &hir::ImplItem) {
     }
 
     fn check_struct_field(&mut self, cx: &LateContext, sf: &hir::StructField) {
-        if let hir::NamedField(_, vis) = sf.node.kind {
-            if vis == hir::Public || self.in_variant {
+        if sf.node.name.is_some() {
+            if sf.node.vis == hir::Public || self.in_variant {
                 let cur_struct_def = *self.struct_def_stack.last()
                     .expect("empty struct_def_stack");
                 self.check_missing_docs_attrs(cx, Some(cur_struct_def),

src/librustc_privacy/lib.rs

@@ -288,7 +288,7 @@ fn visit_item(&mut self, item: &hir::Item) {
                     self.update(def.id(), item_level);
                 }
                 for field in def.fields() {
-                    if field.node.kind.visibility() == hir::Public {
+                    if field.node.vis == hir::Public {
                         self.update(field.node.id, item_level);
                     }
                 }
@@ -1178,7 +1178,7 @@ fn check_sane_privacy(&self, item: &hir::Item) {
             hir::ItemEnum(ref def, _) => {
                 for variant in &def.variants {
                     for field in variant.node.data.fields() {
-                        check_inherited(field.span, field.node.kind.visibility(),
+                        check_inherited(field.span, field.vis,
                                         "visibility qualifiers have no effect on variant fields");
                     }
                 }
@@ -1514,10 +1514,7 @@ fn visit_variant(&mut self, v: &hir::Variant, g: &hir::Generics, item_id: ast::N
     }
 
     fn visit_struct_field(&mut self, s: &hir::StructField) {
-        let vis = match s.node.kind {
-            hir::NamedField(_, vis) | hir::UnnamedField(vis) => vis
-        };
-        if vis == hir::Public || self.in_variant {
+        if s.node.vis == hir::Public || self.in_variant {
             intravisit::walk_struct_field(self, s);
         }
     }
@@ -1728,7 +1725,7 @@ fn visit_item(&mut self, item: &hir::Item) {
                 if item.vis == hir::Public {
                     check.visit_generics(generics);
                     for field in struct_def.fields() {
-                        if field.node.kind.visibility() == hir::Public {
+                        if field.node.vis == hir::Public {
                             check.visit_struct_field(field);
                         }
                     }

src/librustc_resolve/build_reduced_graph.rs

@@ -41,9 +41,7 @@
 use rustc_front::hir::{Item, ItemConst, ItemEnum, ItemExternCrate, ItemFn};
 use rustc_front::hir::{ItemForeignMod, ItemImpl, ItemMod, ItemStatic, ItemDefaultImpl};
 use rustc_front::hir::{ItemStruct, ItemTrait, ItemTy, ItemUse};
-use rustc_front::hir::{NamedField, PathListIdent, PathListMod};
-use rustc_front::hir::StmtDecl;
-use rustc_front::hir::UnnamedField;
+use rustc_front::hir::{PathListIdent, PathListMod, StmtDecl};
 use rustc_front::hir::{Variant, ViewPathGlob, ViewPathList, ViewPathSimple};
 use rustc_front::hir::Visibility;
 use rustc_front::intravisit::{self, Visitor};
@@ -384,12 +382,7 @@ fn build_reduced_graph_for_item(&mut self, item: &Item, parent: Module<'b>) -> M
                 // Record the def ID and fields of this struct.
                 let named_fields = struct_def.fields()
                                              .iter()
-                                             .filter_map(|f| {
-                                                 match f.node.kind {
-                                                     NamedField(name, _) => Some(name),
-                                                     UnnamedField(_) => None,
-                                                 }
-                                             })
+                                             .filter_map(|f| f.node.name)
                                              .collect();
                 let item_def_id = self.ast_map.local_def_id(item.id);
                 self.structs.insert(item_def_id, named_fields);

src/librustc_typeck/collect.rs

@@ -978,24 +978,21 @@ fn convert_struct_variant<'tcx>(tcx: &ty::ctxt<'tcx>,
     let mut seen_fields: FnvHashMap<ast::Name, Span> = FnvHashMap();
     let fields = def.fields().iter().map(|f| {
         let fid = tcx.map.local_def_id(f.node.id);
-        match f.node.kind {
-            hir::NamedField(name, vis) => {
-                let dup_span = seen_fields.get(&name).cloned();
-                if let Some(prev_span) = dup_span {
-                    let mut err = struct_span_err!(tcx.sess, f.span, E0124,
-                                                   "field `{}` is already declared",
-                                                   name);
-                    span_note!(&mut err, prev_span, "previously declared here");
-                    err.emit();
-                } else {
-                    seen_fields.insert(name, f.span);
-                }
-
-                ty::FieldDefData::new(fid, name, vis)
-            },
-            hir::UnnamedField(vis) => {
-                ty::FieldDefData::new(fid, special_idents::unnamed_field.name, vis)
+        if let Some(name) = f.node.name {
+            let dup_span = seen_fields.get(&name).cloned();
+            if let Some(prev_span) = dup_span {
+                let mut err = struct_span_err!(tcx.sess, f.span, E0124,
+                                               "field `{}` is already declared",
+                                               name);
+                span_note!(&mut err, prev_span, "previously declared here");
+                err.emit();
+            } else {
+                seen_fields.insert(name, f.span);
             }
+
+            ty::FieldDefData::new(fid, name, f.node.vis)
+        } else {
+            ty::FieldDefData::new(fid, special_idents::unnamed_field.name, f.node.vis)
         }
     }).collect();
     ty::VariantDefData {