Simplify Cache wrapper to single type, impl Deref on it, fix all compilation errors...

[rust.git] / src / libsyntax / ast.rs

diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index 57f2104e4a50f3eeab24d94ed32438ed3f9e3efe..512f43c86ca010cc55b52c38511eae0b6f526a22 100644 (file)
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -764,6 +764,21 @@ pub fn prefix_str(&self) -> &'static str {
     }
 }
 
+/// The kind of borrow in an `AddrOf` expression,
+/// e.g., `&place` or `&raw const place`.
+#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+#[derive(RustcEncodable, RustcDecodable, HashStable_Generic)]
+pub enum BorrowKind {
+    /// A raw borrow, `&raw const $expr` or `&raw mut $expr`.
+    /// The resulting type is either `*const T` or `*mut T`
+    /// where `T = typeof($expr)`.
+    Ref,
+    /// A normal borrow, `&$expr` or `&mut $expr`.
+    /// The resulting type is either `&'a T` or `&'a mut T`
+    /// where `T = typeof($expr)` and `'a` is some lifetime.
+    Raw,
+}
+
 #[derive(Clone, PartialEq, RustcEncodable, RustcDecodable, Debug, Copy)]
 pub enum BinOpKind {
     /// The `+` operator (addition)
@@ -992,12 +1007,12 @@ pub struct Arm {
 /// Access of a named (e.g., `obj.foo`) or unnamed (e.g., `obj.0`) struct field.
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct Field {
+    pub attrs: ThinVec<Attribute>,
+    pub id: NodeId,
+    pub span: Span,
     pub ident: Ident,
     pub expr: P<Expr>,
-    pub span: Span,
     pub is_shorthand: bool,
-    pub attrs: ThinVec<Attribute>,
-    pub id: NodeId,
     pub is_placeholder: bool,
 }
 
@@ -1081,7 +1096,7 @@ pub fn to_ty(&self) -> Option<P<Ty>> {
 
             ExprKind::Paren(expr) => expr.to_ty().map(TyKind::Paren)?,
 
-            ExprKind::AddrOf(mutbl, expr) => expr
+            ExprKind::AddrOf(BorrowKind::Ref, mutbl, expr) => expr
                 .to_ty()
                 .map(|ty| TyKind::Rptr(None, MutTy { ty, mutbl: *mutbl }))?,
 
@@ -1272,8 +1287,8 @@ pub enum ExprKind {
     /// Optionally "qualified" (e.g., `<Vec<T> as SomeTrait>::SomeType`).
     Path(Option<QSelf>, Path),
 
-    /// A referencing operation (`&a` or `&mut a`).
-    AddrOf(Mutability, P<Expr>),
+    /// A referencing operation (`&a`, `&mut a`, `&raw const a` or `&raw mut a`).
+    AddrOf(BorrowKind, Mutability, P<Expr>),
     /// A `break`, with an optional label to break, and an optional expression.
     Break(Option<Label>, Option<P<Expr>>),
     /// A `continue`, with an optional label.
@@ -1577,12 +1592,14 @@ pub struct FnSig {
 /// signature) or provided (meaning it has a default implementation).
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct TraitItem {
+    pub attrs: Vec<Attribute>,
     pub id: NodeId,
+    pub span: Span,
+    pub vis: Visibility,
     pub ident: Ident,
-    pub attrs: Vec<Attribute>,
+
     pub generics: Generics,
     pub kind: TraitItemKind,
-    pub span: Span,
     /// See `Item::tokens` for what this is.
     pub tokens: Option<TokenStream>,
 }
@@ -1598,14 +1615,15 @@ pub enum TraitItemKind {
 /// Represents anything within an `impl` block.
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct ImplItem {
+    pub attrs: Vec<Attribute>,
     pub id: NodeId,
-    pub ident: Ident,
+    pub span: Span,
     pub vis: Visibility,
+    pub ident: Ident,
+
     pub defaultness: Defaultness,
-    pub attrs: Vec<Attribute>,
     pub generics: Generics,
     pub kind: ImplItemKind,
-    pub span: Span,
     /// See `Item::tokens` for what this is.
     pub tokens: Option<TokenStream>,
 }
@@ -1700,6 +1718,18 @@ pub fn bit_width(&self) -> Option<usize> {
             IntTy::I128 => 128,
         })
     }
+
+    pub fn normalize(&self, target_width: u32) -> Self {
+        match self {
+            IntTy::Isize => match target_width {
+                16 => IntTy::I16,
+                32 => IntTy::I32,
+                64 => IntTy::I64,
+                _ => unreachable!(),
+            },
+            _ => *self,
+        }
+    }
 }
 
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, HashStable_Generic,
@@ -1750,6 +1780,18 @@ pub fn bit_width(&self) -> Option<usize> {
             UintTy::U128 => 128,
         })
     }
+
+    pub fn normalize(&self, target_width: u32) -> Self {
+        match self {
+            UintTy::Usize => match target_width {
+                16 => UintTy::U16,
+                32 => UintTy::U32,
+                64 => UintTy::U64,
+                _ => unreachable!(),
+            },
+            _ => *self,
+        }
+    }
 }
 
 /// A constraint on an associated type (e.g., `A = Bar` in `Foo<A = Bar>` or
@@ -2184,22 +2226,24 @@ pub struct GlobalAsm {
 pub struct EnumDef {
     pub variants: Vec<Variant>,
 }
-
 /// Enum variant.
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct Variant {
-    /// Name of the variant.
-    pub ident: Ident,
     /// Attributes of the variant.
     pub attrs: Vec<Attribute>,
     /// Id of the variant (not the constructor, see `VariantData::ctor_id()`).
     pub id: NodeId,
+    /// Span
+    pub span: Span,
+    /// The visibility of the variant. Syntactically accepted but not semantically.
+    pub vis: Visibility,
+    /// Name of the variant.
+    pub ident: Ident,
+
     /// Fields and constructor id of the variant.
     pub data: VariantData,
     /// Explicit discriminant, e.g., `Foo = 1`.
     pub disr_expr: Option<AnonConst>,
-    /// Span
-    pub span: Span,
     /// Is a macro placeholder
     pub is_placeholder: bool,
 }
@@ -2378,12 +2422,13 @@ pub fn is_pub(&self) -> bool {
 /// E.g., `bar: usize` as in `struct Foo { bar: usize }`.
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct StructField {
+    pub attrs: Vec<Attribute>,
+    pub id: NodeId,
     pub span: Span,
-    pub ident: Option<Ident>,
     pub vis: Visibility,
-    pub id: NodeId,
+    pub ident: Option<Ident>,
+
     pub ty: P<Ty>,
-    pub attrs: Vec<Attribute>,
     pub is_placeholder: bool,
 }
 
@@ -2427,12 +2472,13 @@ pub fn ctor_id(&self) -> Option<NodeId> {
 /// The name might be a dummy name in case of anonymous items.
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct Item {
-    pub ident: Ident,
     pub attrs: Vec<Attribute>,
     pub id: NodeId,
-    pub kind: ItemKind,
-    pub vis: Visibility,
     pub span: Span,
+    pub vis: Visibility,
+    pub ident: Ident,
+
+    pub kind: ItemKind,
 
     /// Original tokens this item was parsed from. This isn't necessarily
     /// available for all items, although over time more and more items should
@@ -2589,12 +2635,13 @@ pub fn descriptive_variant(&self) -> &str {
 
 #[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct ForeignItem {
-    pub ident: Ident,
     pub attrs: Vec<Attribute>,
-    pub kind: ForeignItemKind,
     pub id: NodeId,
     pub span: Span,
     pub vis: Visibility,
+    pub ident: Ident,
+
+    pub kind: ForeignItemKind,
 }
 
 /// An item within an `extern` block.