libsyntax: Accept the new [T, ..N] style for vec.

Author: pcwalton

src/libsyntax/parse/parser.rs

@@ -642,9 +642,9 @@ pub impl Parser {
                 self.obsolete(*self.last_span, ObsoleteMutVector);
             }
 
-            // Parse the `* e` in `[ int * e ]`
+            // Parse the `, ..e` in `[ int, ..e ]`
             // where `e` is a const expression
-            let t = match self.maybe_parse_fixed_vstore_with_star() {
+            let t = match self.maybe_parse_fixed_vstore() {
                 None => ty_vec(mt),
                 Some(suffix) => ty_fixed_length_vec(mt, suffix)
             };
@@ -815,8 +815,14 @@ pub impl Parser {
         })
     }
 
-    fn maybe_parse_fixed_vstore_with_star(&self) -> Option<@ast::expr> {
+    fn maybe_parse_fixed_vstore(&self) -> Option<@ast::expr> {
         if self.eat(&token::BINOP(token::STAR)) {
+            // XXX: Obsolete; remove after snapshot.
+            Some(self.parse_expr())
+        } else if *self.token == token::COMMA &&
+                self.look_ahead(1) == token::DOTDOT {
+            self.bump();
+            self.bump();
             Some(self.parse_expr())
         } else {
             None

src/libsyntax/print/pprust.rs

@@ -424,7 +424,7 @@ pub fn print_type_ex(s: @ps, &&ty: @ast::Ty, print_colons: bool) {
             ast::m_imm => ()
         }
         print_type(s, mt.ty);
-        word(s.s, ~" * ");
+        word(s.s, ~", ..");
         print_expr(s, v);
         word(s.s, ~"]");
       }

src/test/run-pass/new-style-fixed-length-vec.rs

@@ -0,0 +1,10 @@
+use core::io::println;
+
+static FOO: [int, ..3] = [1, 2, 3];
+
+fn main() {
+    println(fmt!("%d %d %d", FOO[0], FOO[1], FOO[2]));
+}
+
+
+