--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Implab/Automaton/AutomatonTransition.cs	Wed Feb 24 08:39:53 2016 +0300
@@ -0,0 +1,33 @@
+using System;
+
+namespace Implab.Automaton {
+    struct AutomatonTransition : IEquatable<AutomatonTransition> {
+        public readonly int s1;
+        public readonly int s2;
+        public readonly int edge;
+
+        public AutomatonTransition(int s1, int s2, int edge) {
+            this.s1 = s1;
+            this.s2 = s2;
+            this.edge = edge;
+        }
+
+
+        #region IEquatable implementation
+        public bool Equals(AutomatonTransition other) {
+            return other.s1 == s1 && other.s2 == s2 && other.edge == edge ;
+        }
+        #endregion
+
+        public override bool Equals(object obj) {
+            if (obj is AutomatonTransition)
+                return Equals((AutomatonTransition)obj);
+            return base.Equals(obj);
+        }
+
+        public override int GetHashCode() {
+            return s1 + s2 + edge;
+        }
+    }
+}
+