Added constructors

examples/linkedList.lox

@@ -1,15 +1,12 @@
 // Linked List via Classes
-class Link {}
-
-fun newLink (value, next) {
-  var link = Link();
-  link.value = value;
-  link.next = next;
-  link.append
-  return link;
+class Link {
+  init(value, next) {
+    this.value = value;
+    this.next = next;
+  }
 }
 
-var ll = newLink(1, newLink(2, newLink(3, nil)));
+var ll = Link(1, Link(2, Link(3, nil)));
 
 fun traverse(n, fn) {
   fn(n);
@@ -36,7 +33,7 @@ fun append(list, newNode) {
 print "list:";
 printList(ll);
 
-append(ll, newLink(40, nil));
+append(ll, Link(40, nil));
 
 print "list:";
 printList(ll);

interpreter.js

@@ -41,7 +41,7 @@ class LoxCallable {
     this.closure = closure
   }
 
-  call(interpreter, args) {
+  call(interpreter, args, isInit = false) {
     const env = new Environment(this.closure)
     for (let param = 0; param < this.declaration.params.length; param++) {
       env.set(this.declaration.params[param], args[param])
@@ -55,6 +55,9 @@ class LoxCallable {
         throw ret
       }
     }
+
+    // Always return "this" if a function is an initializer
+    if (isInit) return this.closure.get({ name: { lexeme: 'this' } })
     return null
   }
 
@@ -76,8 +79,11 @@ class LoxClass extends LoxCallable {
     this.methods = methods
   }
 
-  call() {
-    return new LoxInstance(this)
+  call(interpreter, args) {
+    const instance = new LoxInstance(this)
+    const init = this.methods.get('init')
+    if (init) init.bind(instance).call(interpreter, args, true)
+    return instance
   }
 
   toString() {