Reserving __hasProp and friends, for safety's sake.

lib/lexer.js

@@ -581,7 +581,7 @@
   JS_KEYWORDS = ["if", "else", "true", "false", "new", "return", "try", "catch", "finally", "throw", "break", "continue", "for", "in", "while", "delete", "instanceof", "typeof", "switch", "super", "extends", "class", "this", "null"];
   COFFEE_ALIASES = ["and", "or", "is", "isnt", "not"];
   COFFEE_KEYWORDS = COFFEE_ALIASES.concat(["then", "unless", "until", "loop", "yes", "no", "on", "off", "of", "by", "where", "when"]);
-  RESERVED = ["case", "default", "do", "function", "var", "void", "with", "const", "let", "enum", "export", "import", "native"];
+  RESERVED = ["case", "default", "do", "function", "var", "void", "with", "const", "let", "enum", "export", "import", "native", "__hasProp", "__extends", "__slice"];
   JS_FORBIDDEN = JS_KEYWORDS.concat(RESERVED);
   IDENTIFIER = /^([a-zA-Z\$_](\w|\$)*)/;
   NUMBER = /^(((\b0(x|X)[0-9a-fA-F]+)|((\b[0-9]+(\.[0-9]+)?|\.[0-9]+)(e[+\-]?[0-9]+)?)))\b/i;

lib/nodes.js

@@ -1647,9 +1647,9 @@
     }
   });
   UTILITIES = {
-    __extends: "function(child, parent) {\n    var ctor = function(){ };\n    ctor.prototype = parent.prototype;\n    child.__superClass__ = parent.prototype;\n    child.prototype = new ctor();\n    child.prototype.constructor = child;\n  }",
-    __hasProp: 'Object.prototype.hasOwnProperty',
-    __slice: 'Array.prototype.slice'
+    'extends': "function(child, parent) {\n    var ctor = function(){ };\n    ctor.prototype = parent.prototype;\n    child.__superClass__ = parent.prototype;\n    child.prototype = new ctor();\n    child.prototype.constructor = child;\n  }",
+    hasProp: 'Object.prototype.hasOwnProperty',
+    slice: 'Array.prototype.slice'
   };
   TAB = '  ';
   TRAILING_WHITESPACE = /[ \t]+$/gm;
@@ -1663,7 +1663,7 @@
   utility = function(name) {
     var ref;
     ref = ("__" + name);
-    Scope.root.assign(ref, UTILITIES[ref]);
+    Scope.root.assign(ref, UTILITIES[name]);
     return ref;
   };
 })();

src/lexer.coffee

@@ -501,8 +501,9 @@ COFFEE_KEYWORDS: COFFEE_ALIASES.concat [
 # used by CoffeeScript internally. We throw an error when these are encountered,
 # to avoid having a JavaScript error at runtime.
 RESERVED: [
-  "case", "default", "do", "function", "var", "void", "with"
-  "const", "let", "enum", "export", "import", "native"
+  "case", "default", "do", "function", "var", "void", "with",
+  "const", "let", "enum", "export", "import", "native",
+  "__hasProp", "__extends", "__slice"
 ]
 
 # The superset of both JavaScript keywords and reserved words, none of which may

src/nodes.coffee

@@ -1460,19 +1460,19 @@ UTILITIES: {
   # Correctly set up a prototype chain for inheritance, including a reference
   # to the superclass for `super()` calls. See:
   # [goog.inherits](http://closure-library.googlecode.com/svn/docs/closureGoogBase.js.source.html#line1206).
-  __extends:  """
-              function(child, parent) {
-                  var ctor = function(){ };
-                  ctor.prototype = parent.prototype;
-                  child.__superClass__ = parent.prototype;
-                  child.prototype = new ctor();
-                  child.prototype.constructor = child;
-                }
-              """
+  extends:  """
+            function(child, parent) {
+                var ctor = function(){ };
+                ctor.prototype = parent.prototype;
+                child.__superClass__ = parent.prototype;
+                child.prototype = new ctor();
+                child.prototype.constructor = child;
+              }
+            """
 
   # Shortcuts to speed up the lookup time for native functions.
-  __hasProp: 'Object.prototype.hasOwnProperty'
-  __slice:   'Array.prototype.slice'
+  hasProp: 'Object.prototype.hasOwnProperty'
+  slice:   'Array.prototype.slice'
 
 }
 
@@ -1506,5 +1506,5 @@ literal: (name) ->
 # Helper for ensuring that utility functions are assigned at the top level.
 utility: (name) ->
   ref: "__$name"
-  Scope.root.assign ref, UTILITIES[ref]
+  Scope.root.assign ref, UTILITIES[name]
   ref