diff --git a/src/com/annimon/ownlang/lib/ArrayValue.java b/src/com/annimon/ownlang/lib/ArrayValue.java
index 594c205..3d67b80 100644
--- a/src/com/annimon/ownlang/lib/ArrayValue.java
+++ b/src/com/annimon/ownlang/lib/ArrayValue.java
@@ -72,6 +72,11 @@ public final class ArrayValue implements Value, Iterable<Value> {
         elements[index] = value;
     }
     
+    @Override
+    public Object raw() {
+        return elements;
+    }
+    
     @Override
     public int asInt() {
         throw new TypeException("Cannot cast array to integer");
diff --git a/src/com/annimon/ownlang/lib/FunctionValue.java b/src/com/annimon/ownlang/lib/FunctionValue.java
index 2cc89e7..97ad62a 100644
--- a/src/com/annimon/ownlang/lib/FunctionValue.java
+++ b/src/com/annimon/ownlang/lib/FunctionValue.java
@@ -22,6 +22,11 @@ public final class FunctionValue implements Value {
         return Types.FUNCTION;
     }
     
+    @Override
+    public Object raw() {
+        return value;
+    }
+    
     @Override
     public int asInt() {
         throw new TypeException("Cannot cast function to integer");
diff --git a/src/com/annimon/ownlang/lib/MapValue.java b/src/com/annimon/ownlang/lib/MapValue.java
index d94cc11..3b48ddb 100644
--- a/src/com/annimon/ownlang/lib/MapValue.java
+++ b/src/com/annimon/ownlang/lib/MapValue.java
@@ -45,6 +45,11 @@ public class MapValue implements Value, Iterable<Map.Entry<Value, Value>> {
         map.put(key, value);
     }
     
+    @Override
+    public Object raw() {
+        return map;
+    }
+    
     @Override
     public int asInt() {
         throw new TypeException("Cannot cast map to integer");
diff --git a/src/com/annimon/ownlang/lib/NumberValue.java b/src/com/annimon/ownlang/lib/NumberValue.java
index 85c07f2..b1a919e 100644
--- a/src/com/annimon/ownlang/lib/NumberValue.java
+++ b/src/com/annimon/ownlang/lib/NumberValue.java
@@ -25,6 +25,7 @@ public final class NumberValue implements Value {
         return Types.NUMBER;
     }
     
+    @Override
     public Number raw() {
         return value;
     }
diff --git a/src/com/annimon/ownlang/lib/StringValue.java b/src/com/annimon/ownlang/lib/StringValue.java
index fc6fa89..8a1ac22 100644
--- a/src/com/annimon/ownlang/lib/StringValue.java
+++ b/src/com/annimon/ownlang/lib/StringValue.java
@@ -24,6 +24,11 @@ public final class StringValue implements Value {
     public int type() {
         return Types.STRING;
     }
+
+    @Override
+    public Object raw() {
+        return value;
+    }
     
     @Override
     public int asInt() {
diff --git a/src/com/annimon/ownlang/lib/Value.java b/src/com/annimon/ownlang/lib/Value.java
index e585313..0bac3e4 100644
--- a/src/com/annimon/ownlang/lib/Value.java
+++ b/src/com/annimon/ownlang/lib/Value.java
@@ -6,6 +6,8 @@ package com.annimon.ownlang.lib;
  */
 public interface Value extends Comparable<Value> {
     
+    Object raw();
+    
     int asInt();
     
     double asNumber();
diff --git a/src/com/annimon/ownlang/lib/modules/functions/json_encode.java b/src/com/annimon/ownlang/lib/modules/functions/json_encode.java
index bf880ca..660e4dc 100644
--- a/src/com/annimon/ownlang/lib/modules/functions/json_encode.java
+++ b/src/com/annimon/ownlang/lib/modules/functions/json_encode.java
@@ -26,7 +26,7 @@ public final class json_encode implements Function {
             case Types.MAP:
                 return process((MapValue) val);
             case Types.NUMBER:
-                return ((NumberValue) val).raw();
+                return val.raw();
             case Types.STRING:
                 return val.asString();
             default:
diff --git a/src/com/annimon/ownlang/lib/modules/functions/std_sprintf.java b/src/com/annimon/ownlang/lib/modules/functions/std_sprintf.java
index cb282e7..e6c7256 100644
--- a/src/com/annimon/ownlang/lib/modules/functions/std_sprintf.java
+++ b/src/com/annimon/ownlang/lib/modules/functions/std_sprintf.java
@@ -13,7 +13,7 @@ public final class std_sprintf implements Function {
         final Object[] values = new Object[args.length - 1];
         for (int i = 1; i < args.length; i++) {
             values[i - 1] = (args[i].type() == Types.NUMBER)
-                    ? ((NumberValue) args[i]).raw()
+                    ? args[i].raw()
                     : args[i].asString();
         }
         return new StringValue(String.format(format, values));
diff --git a/src/com/annimon/ownlang/parser/ast/BinaryExpression.java b/src/com/annimon/ownlang/parser/ast/BinaryExpression.java
index 30876a1..df549c4 100644
--- a/src/com/annimon/ownlang/parser/ast/BinaryExpression.java
+++ b/src/com/annimon/ownlang/parser/ast/BinaryExpression.java
@@ -101,7 +101,7 @@ public final class BinaryExpression implements Expression {
         final Number number1 = value1.raw();
         if (value2.type() == Types.NUMBER) {
             // number1 + number2
-            final Number number2 = ((NumberValue) value2).raw();
+            final Number number2 = (Number) value2.raw();
             if (number1 instanceof Double || number2 instanceof Double) {
                 return new NumberValue(number1.doubleValue() + number2.doubleValue());
             }
@@ -138,7 +138,7 @@ public final class BinaryExpression implements Expression {
         final Number number1 = value1.raw();
         if (value2.type() == Types.NUMBER) {
             // number1 - number2
-            final Number number2 = ((NumberValue) value2).raw();
+            final Number number2 = (Number) value2.raw();
             if (number1 instanceof Double || number2 instanceof Double) {
                 return new NumberValue(number1.doubleValue() - number2.doubleValue());
             }
@@ -184,7 +184,7 @@ public final class BinaryExpression implements Expression {
         final Number number1 = value1.raw();
         if (value2.type() == Types.NUMBER) {
             // number1 * number2
-            final Number number2 = ((NumberValue) value2).raw();
+            final Number number2 = (Number) value2.raw();
             if (number1 instanceof Double || number2 instanceof Double) {
                 return new NumberValue(number1.doubleValue() * number2.doubleValue());
             }
@@ -221,7 +221,7 @@ public final class BinaryExpression implements Expression {
         final Number number1 = value1.raw();
         if (value2.type() == Types.NUMBER) {
             // number1 / number2
-            final Number number2 = ((NumberValue) value2).raw();
+            final Number number2 = (Number) value2.raw();
             if (number1 instanceof Double || number2 instanceof Double) {
                 return new NumberValue(number1.doubleValue() / number2.doubleValue());
             }
@@ -258,7 +258,7 @@ public final class BinaryExpression implements Expression {
         final Number number1 = value1.raw();
         if (value2.type() == Types.NUMBER) {
             // number1 % number2
-            final Number number2 = ((NumberValue) value2).raw();
+            final Number number2 = (Number) value2.raw();
             if (number1 instanceof Double || number2 instanceof Double) {
                 return new NumberValue(number1.doubleValue() % number2.doubleValue());
             }
@@ -303,7 +303,7 @@ public final class BinaryExpression implements Expression {
         final Number number1 = value1.raw();
         if (value2.type() == Types.NUMBER) {
             // number1 & number2
-            final Number number2 = ((NumberValue) value2).raw();
+            final Number number2 = (Number) value2.raw();
             if (number1 instanceof Long || number2 instanceof Long) {
                 return new NumberValue(number1.longValue() & number2.longValue());
             }
@@ -328,7 +328,7 @@ public final class BinaryExpression implements Expression {
         final Number number1 = value1.raw();
         if (value2.type() == Types.NUMBER) {
             // number1 | number2
-            final Number number2 = ((NumberValue) value2).raw();
+            final Number number2 = (Number) value2.raw();
             if (number1 instanceof Long || number2 instanceof Long) {
                 return new NumberValue(number1.longValue() | number2.longValue());
             }
@@ -353,7 +353,7 @@ public final class BinaryExpression implements Expression {
         final Number number1 = value1.raw();
         if (value2.type() == Types.NUMBER) {
             // number1 ^ number2
-            final Number number2 = ((NumberValue) value2).raw();
+            final Number number2 = (Number) value2.raw();
             if (number1 instanceof Long || number2 instanceof Long) {
                 return new NumberValue(number1.longValue() ^ number2.longValue());
             }
@@ -383,7 +383,7 @@ public final class BinaryExpression implements Expression {
         final Number number1 = value1.raw();
         if (value2.type() == Types.NUMBER) {
             // number1 << number2
-            final Number number2 = ((NumberValue) value2).raw();
+            final Number number2 = (Number) value2.raw();
             if (number1 instanceof Long || number2 instanceof Long) {
                 return new NumberValue(number1.longValue() << number2.longValue());
             }
@@ -408,7 +408,7 @@ public final class BinaryExpression implements Expression {
         final Number number1 = value1.raw();
         if (value2.type() == Types.NUMBER) {
             // number1 >> number2
-            final Number number2 = ((NumberValue) value2).raw();
+            final Number number2 = (Number) value2.raw();
             if (number1 instanceof Long || number2 instanceof Long) {
                 return new NumberValue(number1.longValue() >> number2.longValue());
             }
@@ -433,7 +433,7 @@ public final class BinaryExpression implements Expression {
         final Number number1 = value1.raw();
         if (value2.type() == Types.NUMBER) {
             // number1 >>> number2
-            final Number number2 = ((NumberValue) value2).raw();
+            final Number number2 = (Number) value2.raw();
             if (number1 instanceof Long || number2 instanceof Long) {
                 return new NumberValue(number1.longValue() >>> number2.longValue());
             }
diff --git a/src/com/annimon/ownlang/parser/ast/UnaryExpression.java b/src/com/annimon/ownlang/parser/ast/UnaryExpression.java
index 75b1f79..8182524 100644
--- a/src/com/annimon/ownlang/parser/ast/UnaryExpression.java
+++ b/src/com/annimon/ownlang/parser/ast/UnaryExpression.java
@@ -88,7 +88,7 @@ public final class UnaryExpression implements Expression, Statement {
     
     private Value increment(Value value) {
         if (value.type() == Types.NUMBER) {
-            final Number number = ((NumberValue) value).raw();
+            final Number number = (Number) value.raw();
             if (number instanceof Double) {
                 return new NumberValue(number.doubleValue() + 1);
             }
@@ -104,7 +104,7 @@ public final class UnaryExpression implements Expression, Statement {
     
     private Value decrement(Value value) {
         if (value.type() == Types.NUMBER) {
-            final Number number = ((NumberValue) value).raw();
+            final Number number = (Number) value.raw();
             if (number instanceof Double) {
                 return new NumberValue(number.doubleValue() - 1);
             }
@@ -124,7 +124,7 @@ public final class UnaryExpression implements Expression, Statement {
             return new StringValue(sb.reverse().toString());
         }
         if (value.type() == Types.NUMBER) {
-            final Number number = ((NumberValue) value).raw();
+            final Number number = (Number) value.raw();
             if (number instanceof Double) {
                 return new NumberValue(-number.doubleValue());
             }
@@ -140,7 +140,7 @@ public final class UnaryExpression implements Expression, Statement {
     
     private Value complement(Value value) {
         if (value.type() == Types.NUMBER) {
-            final Number number = ((NumberValue) value).raw();
+            final Number number = (Number) value.raw();
             if (number instanceof Long) {
                 return new NumberValue(~number.longValue());
             }