syntax: parse `const fn` for free functions and inherent methods.

1 files changed, 8 insertions, 1 deletions

diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index e00cb82649b..bd7fb441bf5 100644
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -1475,6 +1475,12 @@ pub enum Unsafety {
     Normal,
 }
 
+#[derive(Copy, Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
+pub enum Constness {
+    Const,
+    NotConst,
+}
+
 impl fmt::Display for Unsafety {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         fmt::Display::fmt(match *self {
@@ -1543,6 +1549,7 @@ pub enum ExplicitSelf_ {
 pub type ExplicitSelf = Spanned<ExplicitSelf_>;
 
 #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
+             Constness,
 pub struct Mod {
     /// A span from the first token past `{` to the last token until `}`.
     /// For `mod foo;`, the inner span ranges from the first token
@@ -1761,7 +1768,7 @@ pub enum Item_ {
     /// A `const` item
     ItemConst(P<Ty>, P<Expr>),
     /// A function declaration
-    ItemFn(P<FnDecl>, Unsafety, Abi, Generics, P<Block>),
+    ItemFn(P<FnDecl>, Unsafety, Constness, Abi, Generics, P<Block>),
     /// A module
     ItemMod(Mod),
     /// An external module