Auto merge of rust-lang#58079 - ljedrz:HirIdification_phase_1, r=Zoxc

hir: add HirId to main Hir nodes

This is the 1st PR in a series dedicated to `HirId`-ification, i.e. deprecating `ast::NodeId`s after the AST > HIR lowering process. The bigger proof of concept can be seen in rust-lang#57578.

**Phase 1**: store `HirId` in all remaining (some already have it) main HIR nodes (excluding `*Id` objects).

- [x] `Field`
- [x] `FieldPat`
- [x] `ForeignItem`
- [x] `GenericParam`
- [x] `Lifetime`
- [x] `MacroDef`
- [x] `PathSegment`
- [x] `PatKind::Binding`
- [x] `Stmt`
- [x] `StructField`
- [x] `TypeBinding`
- [x] `VariantData`
- [x] `WhereClause`
- [x] `WhereEqPredicate`

r? @Zoxc
Cc @varkor

Author: bors

src/librustc/hir/check_attr.rs

@@ -362,7 +362,7 @@ fn is_c_like_enum(item: &hir::Item) -> bool {
     if let hir::ItemKind::Enum(ref def, _) = item.node {
         for variant in &def.variants {
             match variant.node.data {
-                hir::VariantData::Unit(_) => { /* continue */ }
+                hir::VariantData::Unit(..) => { /* continue */ }
                 _ => { return false; }
             }
         }

src/librustc/hir/intravisit.rs

@@ -694,7 +694,7 @@ pub fn walk_pat<'v, V: Visitor<'v>>(visitor: &mut V, pattern: &'v Pat) {
         PatKind::Ref(ref subpattern, _) => {
             visitor.visit_pat(subpattern)
         }
-        PatKind::Binding(_, canonical_id, ident, ref optional_subpattern) => {
+        PatKind::Binding(_, canonical_id, _hir_id, ident, ref optional_subpattern) => {
             visitor.visit_def_mention(Def::Local(canonical_id));
             visitor.visit_ident(ident);
             walk_list!(visitor, visit_pat, optional_subpattern);

src/librustc/hir/lowering.rs

@@ -875,7 +875,7 @@ impl<'hir> Map<'hir> {
             Node::Field(f) => f.ident.name,
             Node::Lifetime(lt) => lt.name.ident().name,
             Node::GenericParam(param) => param.name.ident().name,
-            Node::Binding(&Pat { node: PatKind::Binding(_,_,l,_), .. }) => l.name,
+            Node::Binding(&Pat { node: PatKind::Binding(_, _, _, l, _), .. }) => l.name,
             Node::StructCtor(_) => self.name(self.get_parent(id)),
             _ => bug!("no name for {}", self.node_to_string(id))
         }

src/librustc/hir/map/mod.rs

@@ -146,6 +146,7 @@ pub const DUMMY_ITEM_LOCAL_ID: ItemLocalId = ItemLocalId::MAX;
 #[derive(Clone, RustcEncodable, RustcDecodable, Copy)]
 pub struct Lifetime {
     pub id: NodeId,
+    pub hir_id: HirId,
     pub span: Span,
 
     /// Either "'a", referring to a named lifetime definition,
@@ -321,6 +322,7 @@ pub struct PathSegment {
     // affected. (In general, we don't bother to get the defs for synthesized
     // segments, only for segments which have come from the AST).
     pub id: Option<NodeId>,
+    pub hir_id: Option<HirId>,
     pub def: Option<Def>,
 
     /// Type/lifetime parameters attached to this path. They come in
@@ -343,6 +345,7 @@ impl PathSegment {
         PathSegment {
             ident,
             id: None,
+            hir_id: None,
             def: None,
             infer_types: true,
             args: None,
@@ -352,13 +355,15 @@ impl PathSegment {
     pub fn new(
         ident: Ident,
         id: Option<NodeId>,
+        hir_id: Option<HirId>,
         def: Option<Def>,
         args: GenericArgs,
         infer_types: bool,
     ) -> Self {
         PathSegment {
             ident,
             id,
+            hir_id,
             def,
             infer_types,
             args: if args.is_empty() {
@@ -528,6 +533,7 @@ pub enum GenericParamKind {
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct GenericParam {
     pub id: NodeId,
+    pub hir_id: HirId,
     pub name: ParamName,
     pub attrs: HirVec<Attribute>,
     pub bounds: GenericBounds,
@@ -558,6 +564,7 @@ impl Generics {
             params: HirVec::new(),
             where_clause: WhereClause {
                 id: DUMMY_NODE_ID,
+                hir_id: DUMMY_HIR_ID,
                 predicates: HirVec::new(),
             },
             span: DUMMY_SP,
@@ -601,6 +608,7 @@ pub enum SyntheticTyParamKind {
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct WhereClause {
     pub id: NodeId,
+    pub hir_id: HirId,
     pub predicates: HirVec<WherePredicate>,
 }
 
@@ -661,6 +669,7 @@ pub struct WhereRegionPredicate {
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct WhereEqPredicate {
     pub id: NodeId,
+    pub hir_id: HirId,
     pub span: Span,
     pub lhs_ty: P<Ty>,
     pub rhs_ty: P<Ty>,
@@ -789,6 +798,7 @@ pub struct MacroDef {
     pub vis: Visibility,
     pub attrs: HirVec<Attribute>,
     pub id: NodeId,
+    pub hir_id: HirId,
     pub span: Span,
     pub body: TokenStream,
     pub legacy: bool,
@@ -878,6 +888,7 @@ impl Pat {
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct FieldPat {
     pub id: NodeId,
+    pub hir_id: HirId,
     /// The identifier for the field
     pub ident: Ident,
     /// The pattern the field is destructured to
@@ -924,7 +935,7 @@ pub enum PatKind {
     /// The `NodeId` is the canonical ID for the variable being bound,
     /// e.g., in `Ok(x) | Err(x)`, both `x` use the same canonical ID,
     /// which is the pattern ID of the first `x`.
-    Binding(BindingAnnotation, NodeId, Ident, Option<P<Pat>>),
+    Binding(BindingAnnotation, NodeId, HirId, Ident, Option<P<Pat>>),
 
     /// A struct or struct variant pattern, e.g., `Variant {x, y, ..}`.
     /// The `bool` is `true` in the presence of a `..`.
@@ -1137,6 +1148,7 @@ impl UnOp {
 #[derive(Clone, RustcEncodable, RustcDecodable)]
 pub struct Stmt {
     pub id: NodeId,
+    pub hir_id: HirId,
     pub node: StmtKind,
     pub span: Span,
 }
@@ -1204,6 +1216,7 @@ pub enum Guard {
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct Field {
     pub id: NodeId,
+    pub hir_id: HirId,
     pub ident: Ident,
     pub expr: P<Expr>,
     pub span: Span,
@@ -1711,6 +1724,7 @@ pub enum ImplItemKind {
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct TypeBinding {
     pub id: NodeId,
+    pub hir_id: HirId,
     pub ident: Ident,
     pub ty: P<Ty>,
     pub span: Span,
@@ -2106,6 +2120,7 @@ pub struct StructField {
     pub ident: Ident,
     pub vis: Visibility,
     pub id: NodeId,
+    pub hir_id: HirId,
     pub ty: P<Ty>,
     pub attrs: HirVec<Attribute>,
 }
@@ -2131,21 +2146,30 @@ impl StructField {
 /// Id of the whole struct lives in `Item`.
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub enum VariantData {
-    Struct(HirVec<StructField>, NodeId),
-    Tuple(HirVec<StructField>, NodeId),
-    Unit(NodeId),
+    Struct(HirVec<StructField>, NodeId, HirId),
+    Tuple(HirVec<StructField>, NodeId, HirId),
+    Unit(NodeId, HirId),
 }
 
 impl VariantData {
     pub fn fields(&self) -> &[StructField] {
         match *self {
-            VariantData::Struct(ref fields, _) | VariantData::Tuple(ref fields, _) => fields,
+            VariantData::Struct(ref fields, ..) | VariantData::Tuple(ref fields, ..) => fields,
             _ => &[],
         }
     }
     pub fn id(&self) -> NodeId {
         match *self {
-            VariantData::Struct(_, id) | VariantData::Tuple(_, id) | VariantData::Unit(id) => id,
+            VariantData::Struct(_, id, ..)
+            | VariantData::Tuple(_, id, ..)
+            | VariantData::Unit(id, ..) => id,
+        }
+    }
+    pub fn hir_id(&self) -> HirId {
+        match *self {
+            VariantData::Struct(_, _, hir_id)
+            | VariantData::Tuple(_, _, hir_id)
+            | VariantData::Unit(_, hir_id) => hir_id,
         }
     }
     pub fn is_struct(&self) -> bool {
@@ -2343,6 +2367,7 @@ pub struct ForeignItem {
     pub attrs: HirVec<Attribute>,
     pub node: ForeignItemKind,
     pub id: NodeId,
+    pub hir_id: HirId,
     pub span: Span,
     pub vis: Visibility,
 }

src/librustc/hir/mod.rs

@@ -83,7 +83,7 @@ impl hir::Pat {
         where F: FnMut(hir::BindingAnnotation, HirId, Span, ast::Ident),
     {
         self.walk(|p| {
-            if let PatKind::Binding(binding_mode, _, ident, _) = p.node {
+            if let PatKind::Binding(binding_mode, _, _, ident, _) = p.node {
                 f(binding_mode, p.hir_id, p.span, ident);
             }
             true
@@ -123,8 +123,8 @@ impl hir::Pat {
 
     pub fn simple_ident(&self) -> Option<ast::Ident> {
         match self.node {
-            PatKind::Binding(hir::BindingAnnotation::Unannotated, _, ident, None) |
-            PatKind::Binding(hir::BindingAnnotation::Mutable, _, ident, None) => Some(ident),
+            PatKind::Binding(hir::BindingAnnotation::Unannotated, _, _, ident, None) |
+            PatKind::Binding(hir::BindingAnnotation::Mutable, _, _, ident, None) => Some(ident),
             _ => None,
         }
     }

src/librustc/hir/pat_util.rs

@@ -1768,7 +1768,7 @@ impl<'a> State<'a> {
         // is that it doesn't matter
         match pat.node {
             PatKind::Wild => self.s.word("_")?,
-            PatKind::Binding(binding_mode, _, ident, ref sub) => {
+            PatKind::Binding(binding_mode, _, _, ident, ref sub) => {
                 match binding_mode {
                     hir::BindingAnnotation::Ref => {
                         self.word_nbsp("ref")?;
@@ -2246,6 +2246,7 @@ impl<'a> State<'a> {
             params: hir::HirVec::new(),
             where_clause: hir::WhereClause {
                 id: ast::DUMMY_NODE_ID,
+                hir_id: hir::DUMMY_HIR_ID,
                 predicates: hir::HirVec::new(),
             },
             span: syntax_pos::DUMMY_SP,

src/librustc/hir/print.rs

@@ -159,6 +159,7 @@ impl_stable_hash_for!(struct ast::Label {
 
 impl_stable_hash_for!(struct hir::Lifetime {
     id,
+    hir_id,
     span,
     name
 });
@@ -172,6 +173,7 @@ impl_stable_hash_for!(struct hir::Path {
 impl_stable_hash_for!(struct hir::PathSegment {
     ident -> (ident.name),
     id,
+    hir_id,
     def,
     infer_types,
     args
@@ -200,6 +202,7 @@ impl_stable_hash_for!(enum hir::TraitBoundModifier {
 
 impl_stable_hash_for!(struct hir::GenericParam {
     id,
+    hir_id,
     name,
     pure_wrt_drop,
     attrs,
@@ -244,6 +247,7 @@ impl_stable_hash_for!(enum hir::SyntheticTyParamKind {
 
 impl_stable_hash_for!(struct hir::WhereClause {
     id,
+    hir_id,
     predicates
 });
 
@@ -268,6 +272,7 @@ impl_stable_hash_for!(struct hir::WhereRegionPredicate {
 
 impl_stable_hash_for!(struct hir::WhereEqPredicate {
     id,
+    hir_id,
     span,
     lhs_ty,
     rhs_ty
@@ -285,6 +290,7 @@ impl_stable_hash_for!(struct hir::MethodSig {
 
 impl_stable_hash_for!(struct hir::TypeBinding {
     id,
+    hir_id,
     ident -> (ident.name),
     ty,
     span
@@ -397,6 +403,7 @@ impl_stable_hash_for!(struct hir::MacroDef {
     vis,
     attrs,
     id,
+    hir_id,
     span,
     legacy,
     body
@@ -423,6 +430,7 @@ impl_stable_hash_for_spanned!(hir::FieldPat);
 
 impl_stable_hash_for!(struct hir::FieldPat {
     id -> _,
+    hir_id -> _,
     ident -> (ident.name),
     pat,
     is_shorthand,
@@ -442,7 +450,7 @@ impl_stable_hash_for!(enum hir::RangeEnd {
 
 impl_stable_hash_for!(enum hir::PatKind {
     Wild,
-    Binding(binding_mode, var, name, sub),
+    Binding(binding_mode, var, hir_id, name, sub),
     Struct(path, field_pats, dotdot),
     TupleStruct(path, field_pats, dotdot),
     Path(path),
@@ -485,6 +493,7 @@ impl_stable_hash_for!(enum hir::UnOp {
 
 impl_stable_hash_for!(struct hir::Stmt {
     id,
+    hir_id,
     node,
     span,
 });
@@ -514,6 +523,7 @@ impl_stable_hash_for!(enum hir::Guard {
 
 impl_stable_hash_for!(struct hir::Field {
     id -> _,
+    hir_id -> _,
     ident,
     expr,
     span,
@@ -836,14 +846,15 @@ impl_stable_hash_for!(struct hir::StructField {
     ident -> (ident.name),
     vis,
     id,
+    hir_id,
     ty,
     attrs
 });
 
 impl_stable_hash_for!(enum hir::VariantData {
-    Struct(fields, id),
-    Tuple(fields, id),
-    Unit(id)
+    Struct(fields, id, hir_id),
+    Tuple(fields, id, hir_id),
+    Unit(id, hir_id)
 });
 
 impl<'a> HashStable<StableHashingContext<'a>> for hir::Item {
@@ -929,6 +940,7 @@ impl_stable_hash_for!(struct hir::ForeignItem {
     attrs,
     node,
     id,
+    hir_id,
     span,
     vis
 });

src/librustc/ich/impls_hir.rs

@@ -408,7 +408,7 @@ fn add_from_pat<'a, 'tcx>(ir: &mut IrMaps<'a, 'tcx>, pat: &P<hir::Pat>) {
     while let Some(pat) = pats.pop_front() {
         use hir::PatKind::*;
         match pat.node {
-            Binding(_, _, _, ref inner_pat) => {
+            Binding(_, _, _, _, ref inner_pat) => {
                 pats.extend(inner_pat.iter());
             }
             Struct(_, ref fields, _) => {

src/librustc/middle/liveness.rs

@@ -1024,7 +1024,7 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
             Node::Variant(&hir::Variant {
                 span,
                 node: hir::VariantKind {
-                    data: hir::VariantData::Tuple(ref fields, _),
+                    data: hir::VariantData::Tuple(ref fields, ..),
                     ..
                 },
                 ..