librustc: Make the default sigil for block lambdas & instead of @.

src/libsyntax/diagnostic.rs

@@ -213,7 +213,9 @@ fn print_diagnostic(topic: ~str, lvl: level, msg: &str) {
 fn collect(messages: @DVec<~str>)
     -> fn@(Option<(@codemap::CodeMap, span)>, &str, level)
 {
-    |_o, msg: &str, _l| { messages.push(msg.to_str()); }
+    let f: @fn(Option<(@codemap::CodeMap, span)>, &str, level) =
+        |_o, msg: &str, _l| { messages.push(msg.to_str()); };
+    f
 }
 
 fn emit(cmsp: Option<(@codemap::CodeMap, span)>, msg: &str, lvl: level) {

src/libsyntax/ext/tt/macro_rules.rs

@@ -136,8 +136,8 @@ fn add_new_extension(cx: ext_ctxt, sp: span, name: ident,
         cx.span_fatal(best_fail_spot, best_fail_msg);
     }
 
-    let exp = |cx, sp, arg| generic_extension(cx, sp, name,
-                                              arg, lhses, rhses);
+    let exp: @fn(ext_ctxt, span, ~[ast::token_tree]) -> mac_result =
+        |cx, sp, arg| generic_extension(cx, sp, name, arg, lhses, rhses);
 
     return mr_def({
         name: *cx.parse_sess().interner.get(name),

src/libsyntax/visit.rs

@@ -641,7 +641,8 @@ fn mk_simple_visitor(v: simple_visitor) -> vt<()> {
         f(fk, decl, body, sp, id);
         visit_fn(fk, decl, body, sp, id, e, v);
     }
-    let visit_ty = |a,b,c| v_ty(v.visit_ty, a, b, c);
+    let visit_ty: @fn(@Ty, &&x: (), vt<()>) =
+        |a,b,c| v_ty(v.visit_ty, a, b, c);
     fn v_struct_field(f: fn@(@struct_field), sf: @struct_field, &&e: (),
                       v: vt<()>) {
         f(sf);