Remove some unnecessary indirection from AST structures

src/librustc_driver/pretty.rs

@@ -614,7 +614,7 @@ impl fold::Folder for ReplaceBodyWithLoop {
         }
     }
 
-    fn fold_trait_item(&mut self, i: P<ast::TraitItem>) -> SmallVector<P<ast::TraitItem>> {
+    fn fold_trait_item(&mut self, i: ast::TraitItem) -> SmallVector<ast::TraitItem> {
         match i.node {
             ast::TraitItemKind::Const(..) => {
                 self.within_static_or_const = true;
@@ -626,7 +626,7 @@ impl fold::Folder for ReplaceBodyWithLoop {
         }
     }
 
-    fn fold_impl_item(&mut self, i: P<ast::ImplItem>) -> SmallVector<P<ast::ImplItem>> {
+    fn fold_impl_item(&mut self, i: ast::ImplItem) -> SmallVector<ast::ImplItem> {
         match i.node {
             ast::ImplItemKind::Const(..) => {
                 self.within_static_or_const = true;

src/librustc_trans/save/dump_csv.rs

@@ -561,7 +561,7 @@ impl <'l, 'tcx> DumpCsvVisitor<'l, 'tcx> {
                     type_parameters: &ast::Generics,
                     trait_ref: &Option<ast::TraitRef>,
                     typ: &ast::Ty,
-                    impl_items: &[P<ast::ImplItem>]) {
+                    impl_items: &[ast::ImplItem]) {
         let mut has_self_ref = false;
         if let Some(impl_data) = self.save_ctxt.get_item_data(item) {
             down_cast_data!(impl_data, ImplData, self, item.span);
@@ -602,7 +602,7 @@ impl <'l, 'tcx> DumpCsvVisitor<'l, 'tcx> {
                      item: &ast::Item,
                      generics: &ast::Generics,
                      trait_refs: &ast::TyParamBounds,
-                     methods: &[P<ast::TraitItem>]) {
+                     methods: &[ast::TraitItem]) {
         let qualname = format!("::{}", self.tcx.map.path_to_string(item.id));
         let val = self.span.snippet(item.span);
         let sub_span = self.span.sub_span_after_keyword(item.span, keywords::Trait);

src/libsyntax/ast.rs

@@ -287,7 +287,7 @@ impl PathParameters {
         }
     }
 
-    pub fn bindings(&self) -> Vec<&P<TypeBinding>> {
+    pub fn bindings(&self) -> Vec<&TypeBinding> {
         match *self {
             PathParameters::AngleBracketed(ref data) => {
                 data.bindings.iter().collect()
@@ -308,7 +308,7 @@ pub struct AngleBracketedParameterData {
     pub types: P<[P<Ty>]>,
     /// Bindings (equality constraints) on associated types, if present.
     /// e.g., `Foo<A=Bar>`.
-    pub bindings: P<[P<TypeBinding>]>,
+    pub bindings: P<[TypeBinding]>,
 }
 
 impl AngleBracketedParameterData {
@@ -508,7 +508,7 @@ impl PartialEq for MetaItemKind {
 #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
 pub struct Block {
     /// Statements in a block
-    pub stmts: Vec<P<Stmt>>,
+    pub stmts: Vec<Stmt>,
     /// An expression at the end of the block
     /// without a semicolon, if any
     pub expr: Option<P<Expr>>,
@@ -1716,12 +1716,12 @@ pub struct Mod {
 #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
 pub struct ForeignMod {
     pub abi: Abi,
-    pub items: Vec<P<ForeignItem>>,
+    pub items: Vec<ForeignItem>,
 }
 
 #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
 pub struct EnumDef {
-    pub variants: Vec<P<Variant>>,
+    pub variants: Vec<Variant>,
 }
 
 #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
@@ -1988,7 +1988,7 @@ pub enum ItemKind {
     Trait(Unsafety,
               Generics,
               TyParamBounds,
-              Vec<P<TraitItem>>),
+              Vec<TraitItem>),
 
     // Default trait implementations
     ///
@@ -2000,7 +2000,7 @@ pub enum ItemKind {
              Generics,
              Option<TraitRef>, // (optional) trait this impl implements
              P<Ty>, // self
-             Vec<P<ImplItem>>),
+             Vec<ImplItem>),
     /// A macro invocation (which includes macro definition)
     Mac(Mac),
 }

src/libsyntax/config.rs

@@ -72,7 +72,7 @@ impl<'a, F> fold::Folder for Context<'a, F> where F: FnMut(&[ast::Attribute]) ->
     fn fold_opt_expr(&mut self, expr: P<ast::Expr>) -> Option<P<ast::Expr>> {
         fold_opt_expr(self, expr)
     }
-    fn fold_stmt(&mut self, stmt: P<ast::Stmt>) -> SmallVector<P<ast::Stmt>> {
+    fn fold_stmt(&mut self, stmt: ast::Stmt) -> SmallVector<ast::Stmt> {
         fold_stmt(self, stmt)
     }
     fn fold_mac(&mut self, mac: ast::Mac) -> ast::Mac {
@@ -95,8 +95,8 @@ pub fn strip_items<'a, F>(diagnostic: &'a Handler,
 }
 
 fn filter_foreign_item<F>(cx: &mut Context<F>,
-                          item: P<ast::ForeignItem>)
-                          -> Option<P<ast::ForeignItem>> where
+                          item: ast::ForeignItem)
+                          -> Option<ast::ForeignItem> where
     F: FnMut(&[ast::Attribute]) -> bool
 {
     if foreign_item_in_cfg(cx, &item) {
@@ -153,18 +153,15 @@ fn fold_item_kind<F>(cx: &mut Context<F>, item: ast::ItemKind) -> ast::ItemKind
                 if !(cx.in_cfg)(&v.node.attrs) {
                     None
                 } else {
-                    Some(v.map(|Spanned {node: ast::Variant_ {name, attrs, data,
-                                                              disr_expr}, span}| {
-                        Spanned {
-                            node: ast::Variant_ {
-                                name: name,
-                                attrs: attrs,
-                                data: fold_struct(cx, data),
-                                disr_expr: disr_expr,
-                            },
-                            span: span
-                        }
-                    }))
+                    Some(Spanned {
+                        node: ast::Variant_ {
+                            name: v.node.name,
+                            attrs: v.node.attrs,
+                            data: fold_struct(cx, v.node.data),
+                            disr_expr: v.node.disr_expr,
+                        },
+                        span: v.span
+                    })
                 }
             });
             ast::ItemKind::Enum(ast::EnumDef {
@@ -225,11 +222,11 @@ fn fold_expr<F>(cx: &mut Context<F>, expr: P<ast::Expr>) -> P<ast::Expr> where
     })
 }
 
-fn fold_stmt<F>(cx: &mut Context<F>, stmt: P<ast::Stmt>) -> SmallVector<P<ast::Stmt>>
+fn fold_stmt<F>(cx: &mut Context<F>, stmt: ast::Stmt) -> SmallVector<ast::Stmt>
     where F: FnMut(&[ast::Attribute]) -> bool
 {
     if stmt_in_cfg(cx, &stmt) {
-        stmt.and_then(|s| fold::noop_fold_stmt(s, cx))
+        fold::noop_fold_stmt(stmt, cx)
     } else {
         SmallVector::zero()
     }

src/libsyntax/ext/base.rs

@@ -82,16 +82,16 @@ impl Annotatable {
         }
     }
 
-    pub fn expect_trait_item(self) -> P<ast::TraitItem> {
+    pub fn expect_trait_item(self) -> ast::TraitItem {
         match self {
-            Annotatable::TraitItem(i) => i,
+            Annotatable::TraitItem(i) => i.unwrap(),
             _ => panic!("expected Item")
         }
     }
 
-    pub fn expect_impl_item(self) -> P<ast::ImplItem> {
+    pub fn expect_impl_item(self) -> ast::ImplItem {
         match self {
-            Annotatable::ImplItem(i) => i,
+            Annotatable::ImplItem(i) => i.unwrap(),
             _ => panic!("expected Item")
         }
     }
@@ -204,8 +204,8 @@ impl<F> IdentMacroExpander for F
 macro_rules! make_stmts_default {
     ($me:expr) => {
         $me.make_expr().map(|e| {
-            SmallVector::one(P(codemap::respan(
-                e.span, ast::StmtKind::Expr(e, ast::DUMMY_NODE_ID))))
+            SmallVector::one(codemap::respan(
+                e.span, ast::StmtKind::Expr(e, ast::DUMMY_NODE_ID)))
         })
     }
 }
@@ -223,7 +223,7 @@ pub trait MacResult {
     }
 
     /// Create zero or more impl items.
-    fn make_impl_items(self: Box<Self>) -> Option<SmallVector<P<ast::ImplItem>>> {
+    fn make_impl_items(self: Box<Self>) -> Option<SmallVector<ast::ImplItem>> {
         None
     }
 
@@ -236,7 +236,7 @@ pub trait MacResult {
     ///
     /// By default this attempts to create an expression statement,
     /// returning None if that fails.
-    fn make_stmts(self: Box<Self>) -> Option<SmallVector<P<ast::Stmt>>> {
+    fn make_stmts(self: Box<Self>) -> Option<SmallVector<ast::Stmt>> {
         make_stmts_default!(self)
     }
 
@@ -273,8 +273,8 @@ make_MacEager! {
     expr: P<ast::Expr>,
     pat: P<ast::Pat>,
     items: SmallVector<P<ast::Item>>,
-    impl_items: SmallVector<P<ast::ImplItem>>,
-    stmts: SmallVector<P<ast::Stmt>>,
+    impl_items: SmallVector<ast::ImplItem>,
+    stmts: SmallVector<ast::Stmt>,
     ty: P<ast::Ty>,
 }
 
@@ -287,11 +287,11 @@ impl MacResult for MacEager {
         self.items
     }
 
-    fn make_impl_items(self: Box<Self>) -> Option<SmallVector<P<ast::ImplItem>>> {
+    fn make_impl_items(self: Box<Self>) -> Option<SmallVector<ast::ImplItem>> {
         self.impl_items
     }
 
-    fn make_stmts(self: Box<Self>) -> Option<SmallVector<P<ast::Stmt>>> {
+    fn make_stmts(self: Box<Self>) -> Option<SmallVector<ast::Stmt>> {
         match self.stmts.as_ref().map_or(0, |s| s.len()) {
             0 => make_stmts_default!(self),
             _ => self.stmts,
@@ -391,19 +391,19 @@ impl MacResult for DummyResult {
         }
     }
 
-    fn make_impl_items(self: Box<DummyResult>) -> Option<SmallVector<P<ast::ImplItem>>> {
+    fn make_impl_items(self: Box<DummyResult>) -> Option<SmallVector<ast::ImplItem>> {
         if self.expr_only {
             None
         } else {
             Some(SmallVector::zero())
         }
     }
 
-    fn make_stmts(self: Box<DummyResult>) -> Option<SmallVector<P<ast::Stmt>>> {
-        Some(SmallVector::one(P(
+    fn make_stmts(self: Box<DummyResult>) -> Option<SmallVector<ast::Stmt>> {
+        Some(SmallVector::one(
             codemap::respan(self.span,
                             ast::StmtKind::Expr(DummyResult::raw_expr(self.span),
-                                                ast::DUMMY_NODE_ID)))))
+                                                ast::DUMMY_NODE_ID))))
     }
 }