From 02141d8df02091e89cb02144417753032337525b Mon Sep 17 00:00:00 2001
From: Danila Fedorin <danila.fedorin@gmail.com>
Date: Mon, 24 Jul 2017 19:46:22 -0700
Subject: [PATCH] Switch underlying implementation to Set from List.

---
 src/org/nwapw/abacus/lexing/pattern/PatternNode.java | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/org/nwapw/abacus/lexing/pattern/PatternNode.java b/src/org/nwapw/abacus/lexing/pattern/PatternNode.java
index adf7bf5..3ef36d7 100644
--- a/src/org/nwapw/abacus/lexing/pattern/PatternNode.java
+++ b/src/org/nwapw/abacus/lexing/pattern/PatternNode.java
@@ -1,13 +1,14 @@
 package org.nwapw.abacus.lexing.pattern;
 
 import java.util.ArrayList;
+import java.util.HashSet;
 
 public class PatternNode<T> {
 
-    protected ArrayList<PatternNode<T>> outputStates;
+    protected HashSet<PatternNode<T>> outputStates;
 
     public PatternNode(){
-        outputStates = new ArrayList<>();
+        outputStates = new HashSet<>();
     }
 
     public boolean matches(char other){