syntax: pass some values around by reference

Author: erickt

src/libsyntax/ext/quote.rs

@@ -88,7 +88,7 @@ pub mod rt {
         }
     }
 
-    impl ToSource for ~[@ast::item] {
+    impl<'self> ToSource for &'self [@ast::item] {
         fn to_source(&self, cx: @ext_ctxt) -> ~str {
             str::connect(self.map(|i| i.to_source(cx)), ~"\n\n")
         }
@@ -100,7 +100,7 @@ pub mod rt {
         }
     }
 
-    impl ToSource for ~[@ast::Ty] {
+    impl<'self> ToSource for &'self [@ast::Ty] {
         fn to_source(&self, cx: @ext_ctxt) -> ~str {
             str::connect(self.map(|i| i.to_source(cx)), ~", ")
         }
@@ -216,7 +216,7 @@ pub mod rt {
         }
     }
 
-    impl ToTokens for ~[@ast::item] {
+    impl<'self> ToTokens for &'self [@ast::item] {
         fn to_tokens(&self, cx: @ext_ctxt) -> ~[token_tree] {
             cx.parse_tts(self.to_source(cx))
         }
@@ -228,7 +228,7 @@ pub mod rt {
         }
     }
 
-    impl ToTokens for ~[@ast::Ty] {
+    impl<'self> ToTokens for &'self [@ast::Ty] {
         fn to_tokens(&self, cx: @ext_ctxt) -> ~[token_tree] {
             cx.parse_tts(self.to_source(cx))
         }

src/libsyntax/print/pprust.rs

@@ -324,7 +324,7 @@ pub fn commasep<IN>(s: @ps, b: breaks, elts: &[IN], op: &fn(@ps, IN)) {
 pub fn commasep_cmnt<IN>(s: @ps, b: breaks, elts: &[IN], op: &fn(@ps, IN),
                          get_span: &fn(IN) -> codemap::span) {
     box(s, 0u, b);
-    let len = vec::len::<IN>(elts);
+    let len = elts.len();
     let mut i = 0u;
     for elts.each |elt| {
         maybe_print_comment(s, get_span(*elt).hi);
@@ -2133,7 +2133,7 @@ pub fn print_comment(s: @ps, cmnt: comments::cmnt) {
     }
 }
 
-pub fn print_string(s: @ps, st: ~str) {
+pub fn print_string(s: @ps, st: &str) {
     word(s.s, ~"\"");
     word(s.s, str::escape_default(st));
     word(s.s, ~"\"");