diff --git a/lib/Cursor.cs b/lib/Cursor.cs
index 1f68a464..7a2d48ad 100644
--- a/lib/Cursor.cs
+++ b/lib/Cursor.cs
@@ -62,6 +62,7 @@ public struct State {
         end = orig.Length;
         bt = new PSN<State>(default(State), null);
         bt.obj.klasses = new PSN<DynMetaObject>(csr.klass, null);
+        bt.obj.xact = new XAct("MATCH", null);
         bt.obj.pos = c.pos;
     }
 
@@ -83,6 +84,35 @@ public struct State {
         bt.obj.xact = new XAct(name, bt.obj.xact);
     }
 
+    public void CommitAll() {
+        XAct x = bt.next.obj.xact;
+        while (x != null) {
+            x.committed = true;
+            x = x.next;
+        }
+    }
+
+    public void CommitSpecificRule(string name) {
+        XAct x = bt.next.obj.xact;
+        name = "RULE " + name;
+        while (x != null) {
+            x.committed = true;
+            x = x.next;
+            if (x.tag.Equals(name))
+                break;
+        }
+    }
+
+    public void CommitRule() {
+        XAct x = bt.next.obj.xact;
+        while (x != null) {
+            x.committed = true;
+            x = x.next;
+            if (x.tag.StartsWith("RULE "))
+                break;
+        }
+    }
+
     public Frame Exact(Frame th, string st) {
         if (bt.obj.pos + st.Length > end)
             return Backtrack(th);
diff --git a/t/RxUnitTest.cs b/t/RxUnitTest.cs
index 4914736d..853584ad 100644
--- a/t/RxUnitTest.cs
+++ b/t/RxUnitTest.cs
@@ -25,6 +25,18 @@ class RxExact: RxOp {
     }
 }
 
+class RxMeta: RxOp {
+    public delegate void MD(RxFrame rx);
+    MD md;
+    public RxMeta(MD md) { this.md = md; }
+    public override void Compile(CodeBuf cb) {
+        cb.ops.Add(delegate(Frame th) {
+            md(th.rx);
+            return th;
+        });
+    }
+}
+
 class RxStar: RxOp {
     RxOp inner;
     public RxStar(RxOp inner) { this.inner = inner; }
@@ -94,5 +106,6 @@ public class RxUnitTest {
 
     public static void Main() {
         RunTest(0, true, "aaaaab", new RxSeq(new RxOp[] { new RxStar( new RxExact("a") ), new RxExact("ab") }));
+        RunTest(1, false, "aaaaab", new RxSeq(new RxOp[] { new RxStar( new RxExact("a") ), new RxMeta(delegate(RxFrame rx) { rx.CommitAll(); }), new RxExact("ab") }));
     }
 }