From e8c8fe86c757bd1208427c0ad4f8134f1b1bff1f Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sun, 4 Oct 2015 17:27:54 +0100
Subject: Throw exception if getting value of variable out of scope

---
 src/main/java/org/zwobble/couscous/interpreter/Environment.java | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'src/main/java/org')

diff --git a/src/main/java/org/zwobble/couscous/interpreter/Environment.java b/src/main/java/org/zwobble/couscous/interpreter/Environment.java
index 5985a94..d748654 100644
--- a/src/main/java/org/zwobble/couscous/interpreter/Environment.java
+++ b/src/main/java/org/zwobble/couscous/interpreter/Environment.java
@@ -18,8 +18,9 @@ public class Environment {
         this.stackFrame = new HashMap<>(stackFrame);
     }
 
-    public InterpreterValue get(int referentId) {
-        return stackFrame.get(referentId).get();
+    public InterpreterValue get(int variableId) {
+        checkVariable(variableId);
+        return stackFrame.get(variableId).get();
     }
 
     public void put(int variableId, InterpreterValue value) {
-- 
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