Support imports of the form `use {foo,bar}`

This fixes #10806.

2 files changed, 21 insertions, 2 deletions

diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index 62bfd7c80f9..75d5cadca14 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -4813,6 +4813,21 @@ impl Parser {
     fn parse_view_path(&self) -> @view_path {
         let lo = self.span.lo;
 
+        if *self.token == token::LBRACE {
+            // use {foo,bar}
+            let idents = self.parse_unspanned_seq(
+                &token::LBRACE, &token::RBRACE,
+                seq_sep_trailing_allowed(token::COMMA),
+                |p| p.parse_path_list_ident());
+            let path = ast::Path {
+                span: mk_sp(lo, self.span.hi),
+                global: false,
+                segments: ~[]
+            };
+            return @spanned(lo, self.span.hi,
+                            view_path_list(path, idents, ast::DUMMY_NODE_ID));
+        }
+
         let first_ident = self.parse_ident();
         let mut path = ~[first_ident];
         debug!("parsed view_path: {}", self.id_to_str(first_ident));
diff --git a/src/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs
index ea382e1cefe..19133fad9ee 100644
--- a/src/libsyntax/print/pprust.rs
+++ b/src/libsyntax/print/pprust.rs
@@ -1935,8 +1935,12 @@ pub fn print_view_path(s: @ps, vp: &ast::view_path) {
       }
 
       ast::view_path_list(ref path, ref idents, _) => {
-        print_path(s, path, false);
-        word(s.s, "::{");
+        if path.segments.is_empty() {
+            word(s.s, "{");
+        } else {
+            print_path(s, path, false);
+            word(s.s, "::{");
+        }
         commasep(s, inconsistent, (*idents), |s, w| {
             print_ident(s, w.node.name);
         });