Syntax for hir::Expr.

Author: cjgillot

src/librustc/arena.rs

@@ -131,7 +131,7 @@ macro_rules! arena_types {
             [] foreign_item: rustc::hir::ForeignItem<$tcx>,
             [] impl_item_ref: rustc::hir::ImplItemRef,
             [few] macro_def: rustc::hir::MacroDef<$tcx>,
-            [] param: rustc::hir::Param,
+            [] param: rustc::hir::Param<$tcx>,
             [] path: rustc::hir::Path,
             [] struct_field: rustc::hir::StructField<$tcx>,
             [] trait_item_ref: rustc::hir::TraitItemRef,

src/librustc/hir/check_attr.rs

@@ -458,7 +458,7 @@ impl CheckAttrVisitor<'tcx> {
             .emit();
     }
 
-    fn check_stmt_attributes(&self, stmt: &hir::Stmt) {
+    fn check_stmt_attributes(&self, stmt: &hir::Stmt<'_>) {
         // When checking statements ignore expressions, they will be checked later
         if let hir::StmtKind::Local(ref l) = stmt.kind {
             for attr in l.attrs.iter() {
@@ -477,7 +477,7 @@ impl CheckAttrVisitor<'tcx> {
         }
     }
 
-    fn check_expr_attributes(&self, expr: &hir::Expr) {
+    fn check_expr_attributes(&self, expr: &hir::Expr<'_>) {
         let target = match expr.kind {
             hir::ExprKind::Closure(..) => Target::Closure,
             _ => Target::Expression,
@@ -537,12 +537,12 @@ impl Visitor<'tcx> for CheckAttrVisitor<'tcx> {
         intravisit::walk_impl_item(self, impl_item)
     }
 
-    fn visit_stmt(&mut self, stmt: &'tcx hir::Stmt) {
+    fn visit_stmt(&mut self, stmt: &'tcx hir::Stmt<'tcx>) {
         self.check_stmt_attributes(stmt);
         intravisit::walk_stmt(self, stmt)
     }
 
-    fn visit_expr(&mut self, expr: &'tcx hir::Expr) {
+    fn visit_expr(&mut self, expr: &'tcx hir::Expr<'tcx>) {
         self.check_expr_attributes(expr);
         intravisit::walk_expr(self, expr)
     }

src/librustc/hir/intravisit.rs

@@ -212,7 +212,7 @@ pub trait Visitor<'v>: Sized {
         }
     }
 
-    fn visit_param(&mut self, param: &'v Param) {
+    fn visit_param(&mut self, param: &'v Param<'v>) {
         walk_param(self, param)
     }
 
@@ -253,25 +253,25 @@ pub trait Visitor<'v>: Sized {
     fn visit_foreign_item(&mut self, i: &'v ForeignItem<'v>) {
         walk_foreign_item(self, i)
     }
-    fn visit_local(&mut self, l: &'v Local) {
+    fn visit_local(&mut self, l: &'v Local<'v>) {
         walk_local(self, l)
     }
-    fn visit_block(&mut self, b: &'v Block) {
+    fn visit_block(&mut self, b: &'v Block<'v>) {
         walk_block(self, b)
     }
-    fn visit_stmt(&mut self, s: &'v Stmt) {
+    fn visit_stmt(&mut self, s: &'v Stmt<'v>) {
         walk_stmt(self, s)
     }
-    fn visit_arm(&mut self, a: &'v Arm) {
+    fn visit_arm(&mut self, a: &'v Arm<'v>) {
         walk_arm(self, a)
     }
-    fn visit_pat(&mut self, p: &'v Pat) {
+    fn visit_pat(&mut self, p: &'v Pat<'v>) {
         walk_pat(self, p)
     }
     fn visit_anon_const(&mut self, c: &'v AnonConst) {
         walk_anon_const(self, c)
     }
-    fn visit_expr(&mut self, ex: &'v Expr) {
+    fn visit_expr(&mut self, ex: &'v Expr<'v>) {
         walk_expr(self, ex)
     }
     fn visit_ty(&mut self, t: &'v Ty) {
@@ -409,7 +409,7 @@ pub fn walk_body<'v, V: Visitor<'v>>(visitor: &mut V, body: &'v Body<'v>) {
     visitor.visit_expr(&body.value);
 }
 
-pub fn walk_local<'v, V: Visitor<'v>>(visitor: &mut V, local: &'v Local) {
+pub fn walk_local<'v, V: Visitor<'v>>(visitor: &mut V, local: &'v Local<'v>) {
     // Intentionally visiting the expr first - the initialization expr
     // dominates the local's definition.
     walk_list!(visitor, visit_expr, &local.init);
@@ -462,7 +462,7 @@ where
     visitor.visit_path(&trait_ref.path, trait_ref.hir_ref_id)
 }
 
-pub fn walk_param<'v, V: Visitor<'v>>(visitor: &mut V, param: &'v Param) {
+pub fn walk_param<'v, V: Visitor<'v>>(visitor: &mut V, param: &'v Param<'v>) {
     visitor.visit_id(param.hir_id);
     visitor.visit_pat(&param.pat);
     walk_list!(visitor, visit_attribute, &param.attrs);
@@ -684,7 +684,7 @@ pub fn walk_assoc_type_binding<'v, V: Visitor<'v>>(visitor: &mut V, type_binding
     }
 }
 
-pub fn walk_pat<'v, V: Visitor<'v>>(visitor: &mut V, pattern: &'v Pat) {
+pub fn walk_pat<'v, V: Visitor<'v>>(visitor: &mut V, pattern: &'v Pat<'v>) {
     visitor.visit_id(pattern.hir_id);
     match pattern.kind {
         PatKind::TupleStruct(ref qpath, ref children, _) => {
@@ -955,13 +955,13 @@ pub fn walk_struct_field<'v, V: Visitor<'v>>(visitor: &mut V, struct_field: &'v
     walk_list!(visitor, visit_attribute, struct_field.attrs);
 }
 
-pub fn walk_block<'v, V: Visitor<'v>>(visitor: &mut V, block: &'v Block) {
+pub fn walk_block<'v, V: Visitor<'v>>(visitor: &mut V, block: &'v Block<'v>) {
     visitor.visit_id(block.hir_id);
     walk_list!(visitor, visit_stmt, &block.stmts);
     walk_list!(visitor, visit_expr, &block.expr);
 }
 
-pub fn walk_stmt<'v, V: Visitor<'v>>(visitor: &mut V, statement: &'v Stmt) {
+pub fn walk_stmt<'v, V: Visitor<'v>>(visitor: &mut V, statement: &'v Stmt<'v>) {
     visitor.visit_id(statement.hir_id);
     match statement.kind {
         StmtKind::Local(ref local) => visitor.visit_local(local),
@@ -977,7 +977,7 @@ pub fn walk_anon_const<'v, V: Visitor<'v>>(visitor: &mut V, constant: &'v AnonCo
     visitor.visit_nested_body(constant.body);
 }
 
-pub fn walk_expr<'v, V: Visitor<'v>>(visitor: &mut V, expression: &'v Expr) {
+pub fn walk_expr<'v, V: Visitor<'v>>(visitor: &mut V, expression: &'v Expr<'v>) {
     visitor.visit_id(expression.hir_id);
     walk_list!(visitor, visit_attribute, expression.attrs.iter());
     match expression.kind {
@@ -1087,7 +1087,7 @@ pub fn walk_expr<'v, V: Visitor<'v>>(visitor: &mut V, expression: &'v Expr) {
     }
 }
 
-pub fn walk_arm<'v, V: Visitor<'v>>(visitor: &mut V, arm: &'v Arm) {
+pub fn walk_arm<'v, V: Visitor<'v>>(visitor: &mut V, arm: &'v Arm<'v>) {
     visitor.visit_id(arm.hir_id);
     visitor.visit_pat(&arm.pat);
     if let Some(ref g) = arm.guard {

src/librustc/hir/lowering.rs

@@ -2022,7 +2022,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         })
     }
 
-    fn lower_local(&mut self, l: &Local) -> (hir::Local, SmallVec<[NodeId; 1]>) {
+    fn lower_local(&mut self, l: &Local) -> (hir::Local<'hir>, SmallVec<[NodeId; 1]>) {
         let mut ids = SmallVec::<[NodeId; 1]>::new();
         if self.sess.features_untracked().impl_trait_in_bindings {
             if let Some(ref ty) = l.ty {
@@ -2586,7 +2586,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         bounds.iter().map(|bound| self.lower_param_bound(bound, itctx.reborrow())).collect()
     }
 
-    fn lower_block(&mut self, b: &Block, targeted_by_break: bool) -> P<hir::Block> {
+    fn lower_block(&mut self, b: &Block, targeted_by_break: bool) -> P<hir::Block<'hir>> {
         let mut stmts = vec![];
         let mut expr = None;
 
@@ -2614,12 +2614,12 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
 
     /// Lowers a block directly to an expression, presuming that it
     /// has no attributes and is not targeted by a `break`.
-    fn lower_block_expr(&mut self, b: &Block) -> hir::Expr {
+    fn lower_block_expr(&mut self, b: &Block) -> hir::Expr<'hir> {
         let block = self.lower_block(b, false);
         self.expr_block(block, AttrVec::new())
     }
 
-    fn lower_pat(&mut self, p: &Pat) -> P<hir::Pat> {
+    fn lower_pat(&mut self, p: &Pat) -> P<hir::Pat<'hir>> {
         let node = match p.kind {
             PatKind::Wild => hir::PatKind::Wild,
             PatKind::Ident(ref binding_mode, ident, ref sub) => {
@@ -2700,7 +2700,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         &mut self,
         pats: &[AstP<Pat>],
         ctx: &str,
-    ) -> (HirVec<P<hir::Pat>>, Option<usize>) {
+    ) -> (HirVec<P<hir::Pat<'hir>>>, Option<usize>) {
         let mut elems = Vec::with_capacity(pats.len());
         let mut rest = None;
 
@@ -2737,7 +2737,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
     /// When encountering `($binding_mode $ident @)? ..` (`slice`),
     /// this is interpreted as a sub-slice pattern semantically.
     /// Patterns that follow, which are not like `slice` -- or an error occurs, are in `after`.
-    fn lower_pat_slice(&mut self, pats: &[AstP<Pat>]) -> hir::PatKind {
+    fn lower_pat_slice(&mut self, pats: &[AstP<Pat>]) -> hir::PatKind<'hir> {
         let mut before = Vec::new();
         let mut after = Vec::new();
         let mut slice = None;
@@ -2796,8 +2796,8 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         p: &Pat,
         binding_mode: &BindingMode,
         ident: Ident,
-        lower_sub: impl FnOnce(&mut Self) -> Option<P<hir::Pat>>,
-    ) -> hir::PatKind {
+        lower_sub: impl FnOnce(&mut Self) -> Option<P<hir::Pat<'hir>>>,
+    ) -> hir::PatKind<'hir> {
         match self.resolver.get_partial_res(p.id).map(|d| d.base_res()) {
             // `None` can occur in body-less function signatures
             res @ None | res @ Some(Res::Local(_)) => {
@@ -2824,12 +2824,12 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         }
     }
 
-    fn pat_wild_with_node_id_of(&mut self, p: &Pat) -> P<hir::Pat> {
+    fn pat_wild_with_node_id_of(&mut self, p: &Pat) -> P<hir::Pat<'hir>> {
         self.pat_with_node_id_of(p, hir::PatKind::Wild)
     }
 
     /// Construct a `Pat` with the `HirId` of `p.id` lowered.
-    fn pat_with_node_id_of(&mut self, p: &Pat, kind: hir::PatKind) -> P<hir::Pat> {
+    fn pat_with_node_id_of(&mut self, p: &Pat, kind: hir::PatKind<'hir>) -> P<hir::Pat<'hir>> {
         P(hir::Pat { hir_id: self.lower_node_id(p.id), kind, span: p.span })
     }
 
@@ -2843,7 +2843,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
     }
 
     /// Used to ban the `..` pattern in places it shouldn't be semantically.
-    fn ban_illegal_rest_pat(&self, sp: Span) -> hir::PatKind {
+    fn ban_illegal_rest_pat(&self, sp: Span) -> hir::PatKind<'hir> {
         self.diagnostic()
             .struct_span_err(sp, "`..` patterns are not allowed here")
             .note("only allowed in tuple, tuple struct, and slice patterns")
@@ -2869,11 +2869,11 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         })
     }
 
-    fn lower_stmt(&mut self, s: &Stmt) -> SmallVec<[hir::Stmt; 1]> {
+    fn lower_stmt(&mut self, s: &Stmt) -> SmallVec<[hir::Stmt<'hir>; 1]> {
         let kind = match s.kind {
             StmtKind::Local(ref l) => {
                 let (l, item_ids) = self.lower_local(l);
-                let mut ids: SmallVec<[hir::Stmt; 1]> = item_ids
+                let mut ids: SmallVec<[hir::Stmt<'hir>; 1]> = item_ids
                     .into_iter()
                     .map(|item_id| {
                         let item_id = hir::ItemId { id: self.lower_node_id(item_id) };
@@ -2944,36 +2944,36 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
 
     // Helper methods for building HIR.
 
-    fn stmt(&mut self, span: Span, kind: hir::StmtKind) -> hir::Stmt {
+    fn stmt(&mut self, span: Span, kind: hir::StmtKind<'hir>) -> hir::Stmt<'hir> {
         hir::Stmt { span, kind, hir_id: self.next_id() }
     }
 
-    fn stmt_expr(&mut self, span: Span, expr: hir::Expr) -> hir::Stmt {
+    fn stmt_expr(&mut self, span: Span, expr: hir::Expr<'hir>) -> hir::Stmt<'hir> {
         self.stmt(span, hir::StmtKind::Expr(P(expr)))
     }
 
     fn stmt_let_pat(
         &mut self,
         attrs: AttrVec,
         span: Span,
-        init: Option<P<hir::Expr>>,
-        pat: P<hir::Pat>,
+        init: Option<P<hir::Expr<'hir>>>,
+        pat: P<hir::Pat<'hir>>,
         source: hir::LocalSource,
-    ) -> hir::Stmt {
+    ) -> hir::Stmt<'hir> {
         let local = hir::Local { attrs, hir_id: self.next_id(), init, pat, source, span, ty: None };
         self.stmt(span, hir::StmtKind::Local(P(local)))
     }
 
-    fn block_expr(&mut self, expr: P<hir::Expr>) -> hir::Block {
+    fn block_expr(&mut self, expr: P<hir::Expr<'hir>>) -> hir::Block<'hir> {
         self.block_all(expr.span, hir::HirVec::new(), Some(expr))
     }
 
     fn block_all(
         &mut self,
         span: Span,
-        stmts: hir::HirVec<hir::Stmt>,
-        expr: Option<P<hir::Expr>>,
-    ) -> hir::Block {
+        stmts: hir::HirVec<hir::Stmt<'hir>>,
+        expr: Option<P<hir::Expr<'hir>>>,
+    ) -> hir::Block<'hir> {
         hir::Block {
             stmts,
             expr,
@@ -2985,33 +2985,33 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
     }
 
     /// Constructs a `true` or `false` literal pattern.
-    fn pat_bool(&mut self, span: Span, val: bool) -> P<hir::Pat> {
+    fn pat_bool(&mut self, span: Span, val: bool) -> P<hir::Pat<'hir>> {
         let expr = self.expr_bool(span, val);
         self.pat(span, hir::PatKind::Lit(P(expr)))
     }
 
-    fn pat_ok(&mut self, span: Span, pat: P<hir::Pat>) -> P<hir::Pat> {
+    fn pat_ok(&mut self, span: Span, pat: P<hir::Pat<'hir>>) -> P<hir::Pat<'hir>> {
         self.pat_std_enum(span, &[sym::result, sym::Result, sym::Ok], hir_vec![pat])
     }
 
-    fn pat_err(&mut self, span: Span, pat: P<hir::Pat>) -> P<hir::Pat> {
+    fn pat_err(&mut self, span: Span, pat: P<hir::Pat<'hir>>) -> P<hir::Pat<'hir>> {
         self.pat_std_enum(span, &[sym::result, sym::Result, sym::Err], hir_vec![pat])
     }
 
-    fn pat_some(&mut self, span: Span, pat: P<hir::Pat>) -> P<hir::Pat> {
+    fn pat_some(&mut self, span: Span, pat: P<hir::Pat<'hir>>) -> P<hir::Pat<'hir>> {
         self.pat_std_enum(span, &[sym::option, sym::Option, sym::Some], hir_vec![pat])
     }
 
-    fn pat_none(&mut self, span: Span) -> P<hir::Pat> {
+    fn pat_none(&mut self, span: Span) -> P<hir::Pat<'hir>> {
         self.pat_std_enum(span, &[sym::option, sym::Option, sym::None], hir_vec![])
     }
 
     fn pat_std_enum(
         &mut self,
         span: Span,
         components: &[Symbol],
-        subpats: hir::HirVec<P<hir::Pat>>,
-    ) -> P<hir::Pat> {
+        subpats: hir::HirVec<P<hir::Pat<'hir>>>,
+    ) -> P<hir::Pat<'hir>> {
         let path = self.std_path(span, components, None, true);
         let qpath = hir::QPath::Resolved(None, P(path));
         let pt = if subpats.is_empty() {
@@ -3022,7 +3022,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         self.pat(span, pt)
     }
 
-    fn pat_ident(&mut self, span: Span, ident: Ident) -> (P<hir::Pat>, hir::HirId) {
+    fn pat_ident(&mut self, span: Span, ident: Ident) -> (P<hir::Pat<'hir>>, hir::HirId) {
         self.pat_ident_binding_mode(span, ident, hir::BindingAnnotation::Unannotated)
     }
 
@@ -3031,7 +3031,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         span: Span,
         ident: Ident,
         bm: hir::BindingAnnotation,
-    ) -> (P<hir::Pat>, hir::HirId) {
+    ) -> (P<hir::Pat<'hir>>, hir::HirId) {
         let hir_id = self.next_id();
 
         (
@@ -3044,11 +3044,11 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         )
     }
 
-    fn pat_wild(&mut self, span: Span) -> P<hir::Pat> {
+    fn pat_wild(&mut self, span: Span) -> P<hir::Pat<'hir>> {
         self.pat(span, hir::PatKind::Wild)
     }
 
-    fn pat(&mut self, span: Span, kind: hir::PatKind) -> P<hir::Pat> {
+    fn pat(&mut self, span: Span, kind: hir::PatKind<'hir>) -> P<hir::Pat<'hir>> {
         P(hir::Pat { hir_id: self.next_id(), kind, span })
     }