--- a/src/luan/impl/Pointer.java	Thu Oct 22 00:33:04 2020 -0600
+++ b/src/luan/impl/Pointer.java	Thu Nov 05 20:24:09 2020 -0700
@@ -2,10 +2,13 @@
 
 import luan.LuanCloneable;
 import luan.LuanCloner;
+import luan.LuanImmutabler;
+import luan.LuanException;
 
 
 public final class Pointer implements LuanCloneable {
-	public Object o;
+	private Object o;
+	private boolean immutable = false;
 
 	public Pointer() {}
 
@@ -20,4 +23,19 @@
 	@Override public void deepenClone(LuanCloneable clone,LuanCloner cloner) {
 		((Pointer)clone).o = cloner.get(o);
 	}
+
+	@Override public void makeImmutable(LuanImmutabler immutabler) throws LuanException {
+		immutabler.makeImmutable(o);
+		immutable = true;
+	}
+
+	public Object get() {
+		return o;
+	}
+
+	public void set(Object o) throws LuanException {
+		if( immutable )
+			throw new LuanException("variable is immutable");
+		this.o = o;
+	}
 }