libsyntax: Separate multiple inherited traits with `+`

2 files changed, 5 insertions, 2 deletions

diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index dd179171fce..5013b2c919f 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -3112,7 +3112,7 @@ pub impl Parser {
     fn parse_trait_ref_list(&self, ket: &token::Token) -> ~[@trait_ref] {
         self.parse_seq_to_before_end(
             ket,
-            seq_sep_none(),
+            seq_sep_trailing_disallowed(token::BINOP(token::PLUS)),
             |p| p.parse_trait_ref()
         )
     }
diff --git a/src/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs
index 735344e43be..d307e3964e7 100644
--- a/src/libsyntax/print/pprust.rs
+++ b/src/libsyntax/print/pprust.rs
@@ -600,8 +600,11 @@ pub fn print_item(s: @ps, &&item: @ast::item) {
         print_generics(s, generics);
         if traits.len() != 0u {
             word(s.s, ~":");
-            for traits.each |trait_| {
+            for traits.eachi |i, trait_| {
                 nbsp(s);
+                if i != 0 {
+                    word_space(s, ~"+");
+                }
                 print_path(s, trait_.path, false);
             }
         }