diff --git a/src/main/java/com/googlecode/aviator/runtime/function/AbstractFunction.java b/src/main/java/com/googlecode/aviator/runtime/function/AbstractFunction.java
index 1a2adbcb..5a84a0dc 100644
--- a/src/main/java/com/googlecode/aviator/runtime/function/AbstractFunction.java
+++ b/src/main/java/com/googlecode/aviator/runtime/function/AbstractFunction.java
@@ -14,20 +14,25 @@
  *
  */
 public abstract class AbstractFunction extends AviatorObject implements AviatorFunction {
-  public AviatorObject throwArity(int n) {
-    String name = this.getName();
+  public AviatorObject throwArity(final int n) {
+    String name = getName();
     throw new IllegalArgumentException("Wrong number of args (" + n + ") passed to: " + name);
   }
 
+  @Override
+  public String desc(final Map<String, Object> env) {
+    return "<" + getAviatorType() + ", " + getName() + ">";
+
+  }
 
   @Override
-  public AviatorObject call(Map<String, Object> env) {
-    return this.throwArity(0);
+  public AviatorObject call(final Map<String, Object> env) {
+    return throwArity(0);
   }
 
 
   @Override
-  public int compare(AviatorObject other, Map<String, Object> env) {
+  public int compare(final AviatorObject other, final Map<String, Object> env) {
     throw new UnsupportedOperationException("Lambda function can't be compared.");
   }
 
@@ -38,188 +43,210 @@ public AviatorType getAviatorType() {
   }
 
   @Override
-  public Object getValue(Map<String, Object> env) {
+  public Object getValue(final Map<String, Object> env) {
     return this;
   }
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1) {
-    return this.throwArity(1);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1) {
+    return throwArity(1);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2) {
-    return this.throwArity(2);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2) {
+    return throwArity(2);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3) {
-    return this.throwArity(3);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3) {
+    return throwArity(3);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4) {
-    return this.throwArity(4);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4) {
+    return throwArity(4);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5) {
-    return this.throwArity(5);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5) {
+    return throwArity(5);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5, AviatorObject arg6) {
-    return this.throwArity(6);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5, final AviatorObject arg6) {
+    return throwArity(6);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5, AviatorObject arg6,
-      AviatorObject arg7) {
-    return this.throwArity(7);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5, final AviatorObject arg6, final AviatorObject arg7) {
+    return throwArity(7);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5, AviatorObject arg6,
-      AviatorObject arg7, AviatorObject arg8) {
-    return this.throwArity(8);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5, final AviatorObject arg6, final AviatorObject arg7,
+      final AviatorObject arg8) {
+    return throwArity(8);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5, AviatorObject arg6,
-      AviatorObject arg7, AviatorObject arg8, AviatorObject arg9) {
-    return this.throwArity(9);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5, final AviatorObject arg6, final AviatorObject arg7,
+      final AviatorObject arg8, final AviatorObject arg9) {
+    return throwArity(9);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5, AviatorObject arg6,
-      AviatorObject arg7, AviatorObject arg8, AviatorObject arg9, AviatorObject arg10) {
-    return this.throwArity(10);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5, final AviatorObject arg6, final AviatorObject arg7,
+      final AviatorObject arg8, final AviatorObject arg9, final AviatorObject arg10) {
+    return throwArity(10);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5, AviatorObject arg6,
-      AviatorObject arg7, AviatorObject arg8, AviatorObject arg9, AviatorObject arg10,
-      AviatorObject arg11) {
-    return this.throwArity(11);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5, final AviatorObject arg6, final AviatorObject arg7,
+      final AviatorObject arg8, final AviatorObject arg9, final AviatorObject arg10,
+      final AviatorObject arg11) {
+    return throwArity(11);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5, AviatorObject arg6,
-      AviatorObject arg7, AviatorObject arg8, AviatorObject arg9, AviatorObject arg10,
-      AviatorObject arg11, AviatorObject arg12) {
-    return this.throwArity(12);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5, final AviatorObject arg6, final AviatorObject arg7,
+      final AviatorObject arg8, final AviatorObject arg9, final AviatorObject arg10,
+      final AviatorObject arg11, final AviatorObject arg12) {
+    return throwArity(12);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5, AviatorObject arg6,
-      AviatorObject arg7, AviatorObject arg8, AviatorObject arg9, AviatorObject arg10,
-      AviatorObject arg11, AviatorObject arg12, AviatorObject arg13) {
-    return this.throwArity(13);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5, final AviatorObject arg6, final AviatorObject arg7,
+      final AviatorObject arg8, final AviatorObject arg9, final AviatorObject arg10,
+      final AviatorObject arg11, final AviatorObject arg12, final AviatorObject arg13) {
+    return throwArity(13);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5, AviatorObject arg6,
-      AviatorObject arg7, AviatorObject arg8, AviatorObject arg9, AviatorObject arg10,
-      AviatorObject arg11, AviatorObject arg12, AviatorObject arg13, AviatorObject arg14) {
-    return this.throwArity(14);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5, final AviatorObject arg6, final AviatorObject arg7,
+      final AviatorObject arg8, final AviatorObject arg9, final AviatorObject arg10,
+      final AviatorObject arg11, final AviatorObject arg12, final AviatorObject arg13,
+      final AviatorObject arg14) {
+    return throwArity(14);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5, AviatorObject arg6,
-      AviatorObject arg7, AviatorObject arg8, AviatorObject arg9, AviatorObject arg10,
-      AviatorObject arg11, AviatorObject arg12, AviatorObject arg13, AviatorObject arg14,
-      AviatorObject arg15) {
-    return this.throwArity(15);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5, final AviatorObject arg6, final AviatorObject arg7,
+      final AviatorObject arg8, final AviatorObject arg9, final AviatorObject arg10,
+      final AviatorObject arg11, final AviatorObject arg12, final AviatorObject arg13,
+      final AviatorObject arg14, final AviatorObject arg15) {
+    return throwArity(15);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5, AviatorObject arg6,
-      AviatorObject arg7, AviatorObject arg8, AviatorObject arg9, AviatorObject arg10,
-      AviatorObject arg11, AviatorObject arg12, AviatorObject arg13, AviatorObject arg14,
-      AviatorObject arg15, AviatorObject arg16) {
-    return this.throwArity(16);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5, final AviatorObject arg6, final AviatorObject arg7,
+      final AviatorObject arg8, final AviatorObject arg9, final AviatorObject arg10,
+      final AviatorObject arg11, final AviatorObject arg12, final AviatorObject arg13,
+      final AviatorObject arg14, final AviatorObject arg15, final AviatorObject arg16) {
+    return throwArity(16);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5, AviatorObject arg6,
-      AviatorObject arg7, AviatorObject arg8, AviatorObject arg9, AviatorObject arg10,
-      AviatorObject arg11, AviatorObject arg12, AviatorObject arg13, AviatorObject arg14,
-      AviatorObject arg15, AviatorObject arg16, AviatorObject arg17) {
-    return this.throwArity(17);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5, final AviatorObject arg6, final AviatorObject arg7,
+      final AviatorObject arg8, final AviatorObject arg9, final AviatorObject arg10,
+      final AviatorObject arg11, final AviatorObject arg12, final AviatorObject arg13,
+      final AviatorObject arg14, final AviatorObject arg15, final AviatorObject arg16,
+      final AviatorObject arg17) {
+    return throwArity(17);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5, AviatorObject arg6,
-      AviatorObject arg7, AviatorObject arg8, AviatorObject arg9, AviatorObject arg10,
-      AviatorObject arg11, AviatorObject arg12, AviatorObject arg13, AviatorObject arg14,
-      AviatorObject arg15, AviatorObject arg16, AviatorObject arg17, AviatorObject arg18) {
-    return this.throwArity(18);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5, final AviatorObject arg6, final AviatorObject arg7,
+      final AviatorObject arg8, final AviatorObject arg9, final AviatorObject arg10,
+      final AviatorObject arg11, final AviatorObject arg12, final AviatorObject arg13,
+      final AviatorObject arg14, final AviatorObject arg15, final AviatorObject arg16,
+      final AviatorObject arg17, final AviatorObject arg18) {
+    return throwArity(18);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5, AviatorObject arg6,
-      AviatorObject arg7, AviatorObject arg8, AviatorObject arg9, AviatorObject arg10,
-      AviatorObject arg11, AviatorObject arg12, AviatorObject arg13, AviatorObject arg14,
-      AviatorObject arg15, AviatorObject arg16, AviatorObject arg17, AviatorObject arg18,
-      AviatorObject arg19) {
-    return this.throwArity(19);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5, final AviatorObject arg6, final AviatorObject arg7,
+      final AviatorObject arg8, final AviatorObject arg9, final AviatorObject arg10,
+      final AviatorObject arg11, final AviatorObject arg12, final AviatorObject arg13,
+      final AviatorObject arg14, final AviatorObject arg15, final AviatorObject arg16,
+      final AviatorObject arg17, final AviatorObject arg18, final AviatorObject arg19) {
+    return throwArity(19);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5, AviatorObject arg6,
-      AviatorObject arg7, AviatorObject arg8, AviatorObject arg9, AviatorObject arg10,
-      AviatorObject arg11, AviatorObject arg12, AviatorObject arg13, AviatorObject arg14,
-      AviatorObject arg15, AviatorObject arg16, AviatorObject arg17, AviatorObject arg18,
-      AviatorObject arg19, AviatorObject arg20) {
-    return this.throwArity(20);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5, final AviatorObject arg6, final AviatorObject arg7,
+      final AviatorObject arg8, final AviatorObject arg9, final AviatorObject arg10,
+      final AviatorObject arg11, final AviatorObject arg12, final AviatorObject arg13,
+      final AviatorObject arg14, final AviatorObject arg15, final AviatorObject arg16,
+      final AviatorObject arg17, final AviatorObject arg18, final AviatorObject arg19,
+      final AviatorObject arg20) {
+    return throwArity(20);
   }
 
 
   @Override
-  public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2,
-      AviatorObject arg3, AviatorObject arg4, AviatorObject arg5, AviatorObject arg6,
-      AviatorObject arg7, AviatorObject arg8, AviatorObject arg9, AviatorObject arg10,
-      AviatorObject arg11, AviatorObject arg12, AviatorObject arg13, AviatorObject arg14,
-      AviatorObject arg15, AviatorObject arg16, AviatorObject arg17, AviatorObject arg18,
-      AviatorObject arg19, AviatorObject arg20, AviatorObject... args) {
-    return this.throwArity(21);
+  public AviatorObject call(final Map<String, Object> env, final AviatorObject arg1,
+      final AviatorObject arg2, final AviatorObject arg3, final AviatorObject arg4,
+      final AviatorObject arg5, final AviatorObject arg6, final AviatorObject arg7,
+      final AviatorObject arg8, final AviatorObject arg9, final AviatorObject arg10,
+      final AviatorObject arg11, final AviatorObject arg12, final AviatorObject arg13,
+      final AviatorObject arg14, final AviatorObject arg15, final AviatorObject arg16,
+      final AviatorObject arg17, final AviatorObject arg18, final AviatorObject arg19,
+      final AviatorObject arg20, final AviatorObject... args) {
+    return throwArity(21);
   }
 
 }
diff --git a/src/main/java/com/googlecode/aviator/runtime/type/AviatorObject.java b/src/main/java/com/googlecode/aviator/runtime/type/AviatorObject.java
index ce7a0218..215f8c4c 100644
--- a/src/main/java/com/googlecode/aviator/runtime/type/AviatorObject.java
+++ b/src/main/java/com/googlecode/aviator/runtime/type/AviatorObject.java
@@ -70,7 +70,12 @@ public AviatorObject not(final Map<String, Object> env) {
   }
 
   public String desc(final Map<String, Object> env) {
-    return "<" + getAviatorType() + ", " + getValue(env) + ">";
+    Object val = getValue(env);
+    if (val != this) {
+      return "<" + getAviatorType() + ", " + getValue(env) + ">";
+    } else {
+      return "<" + getAviatorType() + ", this>";
+    }
   }
 
   public abstract Object getValue(Map<String, Object> env);
diff --git a/src/test/java/com/googlecode/aviator/test/function/GrammarUnitTest.java b/src/test/java/com/googlecode/aviator/test/function/GrammarUnitTest.java
index 239b6b0b..4bab314f 100644
--- a/src/test/java/com/googlecode/aviator/test/function/GrammarUnitTest.java
+++ b/src/test/java/com/googlecode/aviator/test/function/GrammarUnitTest.java
@@ -56,6 +56,15 @@ public void testIssue77() {
     AviatorEvaluator.setOption(Options.ALWAYS_PARSE_FLOATING_POINT_NUMBER_INTO_DECIMAL, false);
   }
 
+  @Test
+  public void testFunctionToString() {
+    AviatorEvaluatorInstance instance = AviatorEvaluator.newInstance();
+    String expression = "(lambda (x) -> lambda(y) -> lambda(z) -> x + y + z end end end)(appName)";
+    HashMap<String, Object> env = new HashMap<>();
+    String s = instance.execute(expression, env, true).toString();
+    assertTrue(s.startsWith("<Lambda,"));
+  }
+
   @Test(expected = ExpressionRuntimeException.class)
   public void testIssue181() {
     Map<String, Object> env = new HashMap<>();