the narwhal integration written in JavaScript has been replaced with CoffeeScript, and compiler-generated variable names now start with '__'

Rakefile

@@ -10,9 +10,19 @@ task :test do
   Dir['test/*/**/test_*.rb'].each {|test| require test }
 end
 
-desc "Recompile the Racc parser (pass -v and -g for verbose debugging)"
-task :build, :extra_args do |t, args|
-  sh "racc #{args[:extra_args]} -o lib/coffee_script/parser.rb lib/coffee_script/grammar.y"
+namespace :build do
+
+  desc "Recompile the Racc parser (pass -v and -g for verbose debugging)"
+  task :parser, :extra_args do |t, args|
+    sh "racc #{args[:extra_args]} -o lib/coffee_script/parser.rb lib/coffee_script/grammar.y"
+  end
+
+  desc "Compile the Narwhal interface for bin/cs"
+  task :narwhal do
+    sh "bin/coffee-script lib/coffee_script/narwhal/coffee-script.cs --print > lib-js/coffee-script.js"
+    sh "bin/coffee-script lib/coffee_script/narwhal/loader.cs --print > lib-js/coffee-script/loader.js"
+  end
+
 end
 
 desc "Build the documentation page"

lib-js/coffee-script.js

@@ -1,87 +1,64 @@
-var FILE = require("file");
-var OS = require("os");
-
-exports.run = function(args) {
-    // TODO: non-REPL
-
+(function(){
+  var File = require('file');
+  var OS = require('os');
+  exports.run = function(args) {
     args.shift();
-
     if (args.length) {
-        require(FILE.absolute(args[0]));
-        return;
+      return require(File.absolute(args[0]));
     }
-
-    while (true)
-    {
-        try {
-            system.stdout.write("cs> ").flush();
-
-            var result = exports.cs_eval(require("readline").readline());
-
-            if (result !== undefined)
-                print(result);
-
-        } catch (e) {
-            print(e);
+    while (true) {
+      try {
+        system.stdout.write('cs> ').flush();
+        var result = exports.cs_eval(require('readline').readline());
+        if (result !== undefined) {
+          print(result);
         }
+      } catch (e) {
+        print(e);
+      }
     }
-}
-
-// executes the coffee-script Ruby program to convert from CoffeeScript to Objective-J.
-// eventually this will hopefully be replaced by a JavaScript program.
-var coffeePath = FILE.path(module.path).dirname().dirname().join("bin", "coffee-script");
-
-exports.compileFile = function(path) {
+  };
+  // executes the coffee-script Ruby program to convert from CoffeeScript to Objective-J.
+  // eventually this will hopefully be replaced by a JavaScript program.
+  var coffeePath = File.path(module.path).dirname().dirname().join('bin', 'coffee-script');
+  exports.compileFile = function(path) {
     var coffee = OS.popen([coffeePath, "--print", "--no-wrap", path]);
-
     if (coffee.wait() !== 0) {
-        system.stderr.print(coffee.stderr.read());
-        throw new Error("coffee-script compile error");
+      system.stderr.print(coffee.stderr.read());
+      throw new Error("coffee-script compile error");
     }
-
     return coffee.stdout.read();
-}
-
-exports.compile = function(source) {
+  };
+  exports.compile = function(source) {
     var coffee = OS.popen([coffeePath, "--eval", "--no-wrap"]);
-
     coffee.stdin.write(source).flush().close();
-
     if (coffee.wait() !== 0) {
-        system.stderr.print(coffee.stderr.read());
-        throw new Error("coffee-script compile error");
+      system.stderr.print(coffee.stderr.read());
+      throw new Error("coffee-script compile error");
     }
-
     return coffee.stdout.read();
-}
-
-// these two functions are equivalent to objective-j's objj_eval/make_narwhal_factory.
-// implemented as a call to coffee and objj_eval/make_narwhal_factory
-exports.cs_eval = function(source) {
+  };
+  // these two functions are equivalent to objective-j's objj_eval/make_narwhal_factory.
+  // implemented as a call to coffee and objj_eval/make_narwhal_factory
+  exports.cs_eval = function(source) {
     init();
-
-    var code = exports.compile(source);
-
-    return eval(code);
-}
-
-exports.make_narwhal_factory = function(path) {
+    return eval(exports.compile(source));
+  };
+  exports.make_narwhal_factory = function(path) {
     init();
-
     var code = exports.compileFile(path);
-
     var factoryText = "function(require,exports,module,system,print){" + code + "/**/\n}";
-
-    if (system.engine === "rhino")
-        return Packages.org.mozilla.javascript.Context.getCurrentContext().compileFunction(global, factoryText, path, 0, null);
-
-    // eval requires parenthesis, but parenthesis break compileFunction.
-    else
-        return eval("(" + factoryText + ")");
-}
-
-
-var init = function() {
+    if (system.engine === "rhino") {
+      return Packages.org.mozilla.javascript.Context.getCurrentContext().compileFunction(global, factoryText, path, 0, null);
+    } else {
+      // eval requires parenthesis, but parenthesis break compileFunction.
+      return eval("(" + factoryText + ")");
+    }
+  };
+  var init = function() {
     // make sure it's only done once
-    init = function(){}
-}
+    init = function() {
+    };
+    return init;
+  };
+})();

lib-js/coffee-script/loader.js

@@ -1,23 +1,23 @@
-var coffeescript = null;
-
-function CoffeeScriptLoader() {
-    var loader = {};
-    var factories = {};
-    
+(function(){
+  var coffeescript = null;
+  var CoffeeScriptLoader = function() {
+    var loader = {
+    };
+    var factories = {
+    };
     loader.reload = function(topId, path) {
-        if (!coffeescript) coffeescript = require("coffee-script");
-        
-        //print("loading objective-j: " + topId + " (" + path + ")");
-        factories[topId] = coffeescript.make_narwhal_factory(path);
-    }
-    
+      coffeescript = coffeescript || require('coffee-script');
+      // print("loading objective-j: " + topId + " (" + path + ")");
+      factories[topId] = coffeescript.make_narwhal_factory(path);
+      return factories[topId];
+    };
     loader.load = function(topId, path) {
-        if (!factories.hasOwnProperty(topId))
-            loader.reload(topId, path);
-        return factories[topId];
-    }
-    
+      if (!(factories.hasOwnProperty(topId))) {
+        loader.reload(topId, path);
+      }
+      return factories[topId];
+    };
     return loader;
-};
-
-require.loader.loaders.unshift([".cs", CoffeeScriptLoader()]);
+  };
+  require.loader.loaders.unshift([".cs", CoffeeScriptLoader()]);
+})();

lib/coffee_script/narwhal/coffee-script.cs

@@ -0,0 +1,63 @@
+# This (javascript) file is generated from lib/coffee_script/narwhal/coffee-script.cs
+
+File: require('file')
+OS:   require('os')
+
+exports.run: args =>
+  args.shift()
+  return require(File.absolute(args[0])) if args.length
+
+  while true
+    try
+      system.stdout.write('cs> ').flush()
+      result: exports.cs_eval(require('readline').readline())
+      print(result) if result isnt undefined
+    catch e
+      print(e)...
+
+# executes the coffee-script Ruby program to convert from CoffeeScript to Objective-J.
+# eventually this will hopefully be replaced by a JavaScript program.
+coffeePath: File.path(module.path).dirname().dirname().join('bin', 'coffee-script')
+
+exports.compileFile: path =>
+  coffee: OS.popen([coffeePath, "--print", "--no-wrap", path])
+
+  if coffee.wait() isnt 0
+    system.stderr.print(coffee.stderr.read())
+    throw new Error("coffee-script compile error").
+
+  coffee.stdout.read().
+
+exports.compile: source =>
+    coffee: OS.popen([coffeePath, "--eval", "--no-wrap"])
+
+    coffee.stdin.write(source).flush().close()
+
+    if coffee.wait() isnt 0
+      system.stderr.print(coffee.stderr.read())
+      throw new Error("coffee-script compile error").
+
+    coffee.stdout.read().
+
+# these two functions are equivalent to objective-j's objj_eval/make_narwhal_factory.
+# implemented as a call to coffee and objj_eval/make_narwhal_factory
+exports.cs_eval: source =>
+    init()
+    eval(exports.compile(source)).
+
+exports.make_narwhal_factory: path =>
+    init()
+    code: exports.compileFile(path)
+
+    factoryText: "function(require,exports,module,system,print){" + code + "/**/\n}"
+
+    if system.engine is "rhino"
+      Packages.org.mozilla.javascript.Context.getCurrentContext().compileFunction(global, factoryText, path, 0, null)
+    else
+      # eval requires parenthesis, but parenthesis break compileFunction.
+      eval("(" + factoryText + ")")..
+
+
+init: =>
+  # make sure it's only done once
+  init: => ..

lib/coffee_script/narwhal/loader.cs

@@ -0,0 +1,20 @@
+# This (javascript) file is generated from lib/coffee_script/narwhal/loader.cs
+
+coffeescript: null
+
+CoffeeScriptLoader: =>
+  loader: {}
+  factories: {}
+
+  loader.reload: topId, path =>
+    coffeescript ||: require('coffee-script')
+    # print("loading objective-j: " + topId + " (" + path + ")");
+    factories[topId]: coffeescript.make_narwhal_factory(path).
+
+  loader.load: topId, path =>
+    loader.reload(topId, path) unless factories.hasOwnProperty(topId)
+    factories[topId].
+
+  loader.
+
+require.loader.loaders.unshift([".cs", CoffeeScriptLoader()])

lib/coffee_script/nodes.rb

@@ -479,6 +479,7 @@ module CoffeeScript
 
     def compile(o={})
       o = super(o)
+      o.delete(:return)
       indent = o[:indent] + TAB
       cond = @condition.compile(o.merge(:no_paren => true))
       write("while (#{cond}) {\n#{@body.compile(o.merge(:indent => indent))}\n#{o[:indent]}}")

lib/coffee_script/scope.rb

@@ -11,7 +11,7 @@ module CoffeeScript
     def initialize(parent=nil)
       @parent = parent
       @variables = {}
-      @temp_variable = @parent ? @parent.temp_variable : 'a'
+      @temp_variable = @parent ? @parent.temp_variable : '__a'
     end
 
     # Look up a variable in lexical scope, or declare it if not found.

test/fixtures/each.js

@@ -8,16 +8,16 @@
       if (obj.forEach) {
         obj.forEach(iterator, context);
       } else if (_.isArray(obj) || _.isArguments(obj)) {
-        var a = obj;
-        for (var b=0, c=a.length; b<c; b++) {
-          var item = a[b];
-          var i = b;
+        var __a = obj;
+        for (var __b=0, __c=__a.length; __b<__c; __b++) {
+          var item = __a[__b];
+          var i = __b;
           iterator.call(context, item, i, obj);
         }
       } else {
-        var d = _.keys(obj);
-        for (var e=0, f=d.length; e<f; e++) {
-          var key = d[e];
+        var __d = _.keys(obj);
+        for (var __e=0, __f=__d.length; __e<__f; __e++) {
+          var key = __d[__e];
           iterator.call(context, obj[key], key, obj);
         }
       }

test/fixtures/each_no_wrap.js

@@ -7,16 +7,16 @@ _.each = function(obj, iterator, context) {
     if (obj.forEach) {
       obj.forEach(iterator, context);
     } else if (_.isArray(obj) || _.isArguments(obj)) {
-      var a = obj;
-      for (var b=0, c=a.length; b<c; b++) {
-        var item = a[b];
-        var i = b;
+      var __a = obj;
+      for (var __b=0, __c=__a.length; __b<__c; __b++) {
+        var item = __a[__b];
+        var i = __b;
         iterator.call(context, item, i, obj);
       }
     } else {
-      var d = _.keys(obj);
-      for (var e=0, f=d.length; e<f; e++) {
-        var key = d[e];
+      var __d = _.keys(obj);
+      for (var __e=0, __f=__d.length; __e<__f; __e++) {
+        var key = __d[__e];
         iterator.call(context, obj[key], key, obj);
       }
     }