All the initial special forms has been done

src/main/java/serene/simple/FalseNode.java

@@ -7,4 +7,9 @@ public class FalseNode extends Node {
     public Object eval(Scope scope) {
         return false;
     }
+
+    @Override
+    public String toString() {
+        return "false";
+    }
 }

src/main/java/serene/simple/FnSpecialForm.java

@@ -39,6 +39,11 @@ public class FnSpecialForm extends SpecialForm {
 
                 return output;
             }
+
+            @Override
+            public String toString() {
+                return "Function@" + System.identityHashCode(this);
+            }
         };
     }
 }

src/main/java/serene/simple/FunctionNode.java

@@ -5,4 +5,9 @@ public class FunctionNode extends Node {
     public Object eval(Scope scope) {
         return this;
     }
+
+    @Override
+    public String toString() {
+        return "Function@" + this;
+    }
 }

src/main/java/serene/simple/ListNode.java

@@ -94,4 +94,17 @@ public class ListNode<T extends Node> extends Node implements Iterable<T> {
             }
         };
     }
+
+    public String toString() {
+        if (this.length == 0) {
+            return "()";
+        }
+
+        String output = "(" + this.first();
+        for(Node x : this.rest()) {
+            output = output + " " + x.toString();
+        }
+
+        return output + ")";
+    }
 }

src/main/java/serene/simple/Main.java

@@ -31,9 +31,10 @@ public class Main {
             if (inputData == null) break;
 
             ByteArrayInputStream inputStream = new ByteArrayInputStream(inputData.getBytes());
-            ListNode<Node> nodes = Reader.read(inputStream);
+
 
             try {
+                ListNode<Node> nodes = Reader.read(inputStream);
                 Object result = ListNode.EMPTY;
 
                 for (Node n : nodes) {
@@ -42,7 +43,7 @@ public class Main {
 
                 if (result != ListNode.EMPTY) {
                     System.out.print(";; ");
-                    System.out.println(result);
+                    System.out.println(result.toString());
                 }
             }
             catch(Exception e) {

src/main/java/serene/simple/NilNode.java

@@ -7,4 +7,10 @@ public class NilNode extends Node {
     public Object eval(Scope scope) {
         return this;
     }
+
+    @Override
+    public String toString() {
+        return "nil";
+    }
+
 }

src/main/java/serene/simple/Node.java

@@ -9,6 +9,7 @@ public abstract class Node {
         return this == n;
     }
 
+    @Override
     public String toString() {
         String className = this.getClass().getName();
         return String.format("%s<%s>", className, System.identityHashCode(this));

src/main/java/serene/simple/NumberNode.java

@@ -11,4 +11,9 @@ public class NumberNode extends Node {
     public Object eval(Scope scope) {
         return this.value;
     }
-}
+
+    @Override
+    public String toString() {
+        return String.format("%s", this.value);
+    }
+ }

src/main/java/serene/simple/QuoteSpecialForm.java

@@ -1,13 +1,21 @@
 package serene.simple;
 
-
 public class QuoteSpecialForm extends SpecialForm {
-    public QuoteSpecialForm(ListNode node) {
+
+    // public QuoteSpecialForm(Node node) {
+    //     this.x = node;
+    // }
+
+    public QuoteSpecialForm(ListNode<Node> node) throws SereneException {
         super(node);
+
+        if (this.node.rest().length != 1) {
+            throw new SereneException("quote expects only one arguement");
+        }
     }
 
     @Override
     public Object eval(final Scope scope) {
-        return this.node;
+        return this.node.rest().first();
     }
 }

src/main/java/serene/simple/Reader.java

@@ -10,7 +10,7 @@ import java.util.List;
 
 
 public class Reader {
-    public static Node readNode(PushbackReader inputStream) throws IOException {
+    public static Node readNode(PushbackReader inputStream) throws IOException, IllegalArgumentException, SereneException {
         char c = (char) inputStream.read();
         inputStream.unread(c);
 
@@ -28,11 +28,11 @@ public class Reader {
         }
     }
 
-    public static ListNode<Node> read(InputStream inputStream) throws IOException {
+    public static ListNode<Node> read(InputStream inputStream) throws IOException, IllegalArgumentException, SereneException {
         return read(new PushbackReader(new InputStreamReader(inputStream)));
     }
 
-    public static ListNode<Node> read(PushbackReader inputStream) throws IOException {
+    public static ListNode<Node> read(PushbackReader inputStream) throws IOException, IllegalArgumentException, SereneException {
         List<Node> nodes = new ArrayList<Node>();
         skipWhiteSpaces(inputStream);
 
@@ -47,7 +47,7 @@ public class Reader {
         return ListNode.list(nodes);
     }
 
-    private static Node readList(PushbackReader inputStream) throws IOException {
+    private static Node readList(PushbackReader inputStream) throws IOException, SereneException {
         char opening = (char) inputStream.read();
         assert opening == '(' : "Lists must start with a '('";
 

src/main/java/serene/simple/SpecialForm.java

@@ -7,13 +7,15 @@ public class SpecialForm extends Node {
     private static final SymbolNode IF = new SymbolNode("if");
     private static final SymbolNode QUOTE = new SymbolNode("quote");
 
-    public final ListNode<Node> node;
+    public ListNode<Node> node;
+
+    public SpecialForm() {}
 
     public SpecialForm(ListNode<Node> node) {
         this.node = node;
     }
 
-    public static Node check(ListNode<Node> l) {
+    public static Node check(ListNode<Node> l) throws SereneException {
         if (l == ListNode.EMPTY) {
             return l;
         } else if (l.first().equals(DEF)) {
@@ -30,7 +32,7 @@ public class SpecialForm extends Node {
     }
 
     @Override
-    public Object eval(Scope scope) {
+    public Object eval(Scope scope) throws SereneException {
         throw new SereneException("Can't use SpecialForm directly");
     }
 }

src/main/java/serene/simple/SymbolNode.java

@@ -26,7 +26,8 @@ public class SymbolNode extends Node {
         return scope.lookupSymbol(this.name);
     }
 
+    @Override
     public String toString() {
-        return String.format("Symbol<%s>", this.name);
+        return this.name;
     }
 }

src/main/java/serene/simple/TrueNode.java

@@ -5,4 +5,9 @@ public class TrueNode extends Node {
     public Object eval(Scope scope) {
         return true;
     }
+
+    @Override
+    public String toString() {
+        return "true";
+    }
 }