syntax: Move the AST from @T to Gc<T>

1 files changed, 5 insertions, 3 deletions

diff --git a/src/libsyntax/parse/obsolete.rs b/src/libsyntax/parse/obsolete.rs
index bba400742b5..9706176ca8b 100644
--- a/src/libsyntax/parse/obsolete.rs
+++ b/src/libsyntax/parse/obsolete.rs
@@ -22,6 +22,8 @@ use codemap::{Span, respan};
 use parse::parser;
 use parse::token;
 
+use std::gc::Gc;
+
 /// The specific types of unsupported syntax
 #[deriving(PartialEq, Eq, Hash)]
 pub enum ObsoleteSyntax {
@@ -35,7 +37,7 @@ pub trait ParserObsoleteMethods {
     fn obsolete(&mut self, sp: Span, kind: ObsoleteSyntax);
     // Reports an obsolete syntax non-fatal error, and returns
     // a placeholder expression
-    fn obsolete_expr(&mut self, sp: Span, kind: ObsoleteSyntax) -> @Expr;
+    fn obsolete_expr(&mut self, sp: Span, kind: ObsoleteSyntax) -> Gc<Expr>;
     fn report(&mut self,
               sp: Span,
               kind: ObsoleteSyntax,
@@ -68,9 +70,9 @@ impl<'a> ParserObsoleteMethods for parser::Parser<'a> {
 
     // Reports an obsolete syntax non-fatal error, and returns
     // a placeholder expression
-    fn obsolete_expr(&mut self, sp: Span, kind: ObsoleteSyntax) -> @Expr {
+    fn obsolete_expr(&mut self, sp: Span, kind: ObsoleteSyntax) -> Gc<Expr> {
         self.obsolete(sp, kind);
-        self.mk_expr(sp.lo, sp.hi, ExprLit(@respan(sp, LitNil)))
+        self.mk_expr(sp.lo, sp.hi, ExprLit(box(GC) respan(sp, LitNil)))
     }
 
     fn report(&mut self,