fixes #1009: classes with reserved words as determined names

lib/nodes.js

@@ -1114,6 +1114,9 @@
       var decl, klass, lname, name;
       decl = this.determineName();
       name = decl || this.name || '_Class';
+      if (name.reserved) {
+        name = "_" + name;
+      }
       lname = new Literal(name);
       this.setContext(name);
       this.walkBody(name, o);

src/nodes.coffee

@@ -892,6 +892,7 @@ exports.Class = class Class extends Base
   compileNode: (o) ->
     decl  = @determineName()
     name  = decl or @name or '_Class'
+    name = "_#{name}" if name.reserved
     lname = new Literal name
 
     @setContext name

test/classes.coffee

@@ -500,3 +500,6 @@ test "#1464: bound class methods should keep context", ->
     @boundStaticEqual= => new this(nonce2)
   eq nonce,  C.boundStaticColon().id
   eq nonce2, C.boundStaticEqual().id
+
+test "#1009: classes with reserved words as determined names", ->
+  eq 'function', typeof (-> class @for).call {}