libsyntax: convert visit to pass ty_params by reference

1 files changed, 9 insertions, 4 deletions

diff --git a/src/libsyntax/ext/tt/macro_rules.rs b/src/libsyntax/ext/tt/macro_rules.rs
index f42bb01f7c2..cfb6e45cb5b 100644
--- a/src/libsyntax/ext/tt/macro_rules.rs
+++ b/src/libsyntax/ext/tt/macro_rules.rs
@@ -71,7 +71,7 @@ pub fn add_new_extension(cx: ext_ctxt, sp: span, name: ident,
 
     // Given `lhses` and `rhses`, this is the new macro we create
     fn generic_extension(cx: ext_ctxt, sp: span, name: ident,
-                         arg: ~[ast::token_tree],
+                         arg: &[ast::token_tree],
                          lhses: ~[@named_match], rhses: ~[@named_match])
     -> MacResult {
 
@@ -79,7 +79,7 @@ pub fn add_new_extension(cx: ext_ctxt, sp: span, name: ident,
             io::println(fmt!("%s! { %s }",
                              cx.str_of(name),
                              print::pprust::tt_to_str(
-                                 ast::tt_delim(arg),
+                                 ast::tt_delim(vec::from_slice(arg)),
                                  cx.parse_sess().interner)));
         }
 
@@ -94,7 +94,12 @@ pub fn add_new_extension(cx: ext_ctxt, sp: span, name: ident,
             match *lhs {
               @matched_nonterminal(nt_matchers(ref mtcs)) => {
                 // `none` is because we're not interpolating
-                let arg_rdr = new_tt_reader(s_d, itr, None, arg) as reader;
+                let arg_rdr = new_tt_reader(
+                    s_d,
+                    itr,
+                    None,
+                    vec::from_slice(arg)
+                ) as reader;
                 match parse(cx.parse_sess(), cx.cfg(), arg_rdr, (*mtcs)) {
                   success(named_matches) => {
                     let rhs = match rhses[i] {
@@ -136,7 +141,7 @@ pub fn add_new_extension(cx: ext_ctxt, sp: span, name: ident,
         cx.span_fatal(best_fail_spot, best_fail_msg);
     }
 
-    let exp: @fn(ext_ctxt, span, ~[ast::token_tree]) -> MacResult =
+    let exp: @fn(ext_ctxt, span, &[ast::token_tree]) -> MacResult =
         |cx, sp, arg| generic_extension(cx, sp, name, arg, lhses, rhses);
 
     return MRDef(MacroDef{