Add missing case to parse_ty, un-XFAIL cast.rs.

src/Makefile

@@ -526,6 +526,7 @@ TEST_XFAILS_SELF := $(filter-out \
                         bool-not.rs \
                         box.rs \
                         box-in-tup.rs \
+                        cast.rs \
                         char.rs \
                         complex.rs \
                         dead-code-one-arm-if.rs \

src/comp/front/parser.rs

@@ -140,6 +140,7 @@ impure fn parse_ty(parser p) -> @ast.ty {
     auto hi = lo;
     let ast.ty_ t;
     alt (p.peek()) {
+        case (token.BOOL) { p.bump(); t = ast.ty_bool; }
         case (token.INT) { p.bump(); t = ast.ty_int; }
         case (token.UINT) { p.bump(); t = ast.ty_int; }
         case (token.STR) { p.bump(); t = ast.ty_str; }