syntax: Use the new `for` protocol

1 files changed, 16 insertions, 0 deletions

diff --git a/src/libsyntax/ext/pipes/proto.rs b/src/libsyntax/ext/pipes/proto.rs
index 647c7741bd8..7c78ec066d0 100644
--- a/src/libsyntax/ext/pipes/proto.rs
+++ b/src/libsyntax/ext/pipes/proto.rs
@@ -100,6 +100,7 @@ pub impl state_ {
 
     /// Iterate over the states that can be reached in one message
     /// from this state.
+    #[cfg(stage0)]
     fn reachable(&self, f: &fn(state) -> bool) {
         for self.messages.each |m| {
             match *m {
@@ -111,6 +112,21 @@ pub impl state_ {
             }
         }
     }
+    /// Iterate over the states that can be reached in one message
+    /// from this state.
+    #[cfg(not(stage0))]
+    fn reachable(&self, f: &fn(state) -> bool) -> bool {
+        for self.messages.each |m| {
+            match *m {
+              message(_, _, _, _, Some(next_state { state: ref id, _ })) => {
+                let state = self.proto.get_state((*id));
+                if !f(state) { return false; }
+              }
+              _ => ()
+            }
+        }
+        return true;
+    }
 }
 
 pub type protocol = @mut protocol_;