1 files changed, 23 insertions, 5 deletions
diff --git a/boil/library/TypeFactory.java b/boil/library/TypeFactory.java
index 8dd910e..c84f64e 100644
--- a/boil/library/TypeFactory.java
+++ b/boil/library/TypeFactory.java
@@ -13,13 +13,31 @@ public class TypeFactory {
         this.map = new HashMap<>();
     }
 
-    public String addNewAlias(TypeInstance t) {
-        String alias = String.format("t.%d", this.type_num++);
-        this.map.put(t, alias);
+    public String alias(TypeInstance t) {
+        /**
+         * Given a TypeInstance, return the designated
+         * vapor alias. If the alias does not exist, create it.
+         */
+        String alias;
+        if ((alias = this.map.get(t)) == null) {
+            alias = String.format("t.%d", this.type_num++);
+            this.map.put(t, alias);
+        }
+
         return alias;
     }
 
-    public String retrieveAlias(TypeInstance t) {
-        return this.map.get(t);
+    public String retrieveRecentList(int x) {
+        /**
+         * Given int x, retrieve a space-delimited
+         * list of the x most recent entries.
+         */
+        String rtn = "";
+        for (int i = type_num-x; i < type_num; ++i) {
+            rtn += String.format(" t.%d",
+                                 i);
+        }
+
+        return rtn;
     }
 }