Add program metadata

Include program id and depth on the generated wrapper objects. This
allows helpers who are passed these objects to differentiate between
helpers for cases where they may want to cache the generated DOM
structure.

lib/handlebars/base.js

@@ -7,11 +7,12 @@ var Handlebars = {};
 // BEGIN(BROWSER)
 
 Handlebars.VERSION = "1.0.0-rc.3";
-Handlebars.COMPILER_REVISION = 2;
+Handlebars.COMPILER_REVISION = 3;
 
 Handlebars.REVISION_CHANGES = {
   1: '<= 1.0.rc.2', // 1.0.rc.2 is actually rev2 but doesn't report it
-  2: '>= 1.0.0-rc.3'
+  2: '== 1.0.0-rc.3',
+  3: '>= 1.0.0-rc.4'
 };
 
 Handlebars.helpers  = {};

lib/handlebars/compiler/compiler.js

@@ -993,12 +993,7 @@ JavaScriptCompiler.prototype = {
       else { programParams.push("depth" + (depth - 1)); }
     }
 
-    if(depths.length === 0) {
-      return "self.program(" + programParams.join(", ") + ")";
-    } else {
-      programParams.shift();
-      return "self.programWithDepth(" + programParams.join(", ") + ")";
-    }
+    return (depths.length === 0 ? "self.program(" : "self.programWithDepth(") + programParams.join(", ") + ")";
   },
 
   register: function(name, val) {

lib/handlebars/runtime.js

@@ -12,13 +12,11 @@ Handlebars.VM = {
       program: function(i, fn, data) {
         var programWrapper = this.programs[i];
         if(data) {
-          return Handlebars.VM.program(fn, data);
-        } else if(programWrapper) {
-          return programWrapper;
-        } else {
-          programWrapper = this.programs[i] = Handlebars.VM.program(fn);
-          return programWrapper;
+          programWrapper = Handlebars.VM.program(i, fn, data);
+        } else if (!programWrapper) {
+          programWrapper = this.programs[i] = Handlebars.VM.program(i, fn);
         }
+        return programWrapper;
       },
       programWithDepth: Handlebars.VM.programWithDepth,
       noop: Handlebars.VM.noop,
@@ -50,21 +48,27 @@ Handlebars.VM = {
     };
   },
 
-  programWithDepth: function(fn, data, $depth) {
-    var args = Array.prototype.slice.call(arguments, 2);
+  programWithDepth: function(i, fn, data /*, $depth */) {
+    var args = Array.prototype.slice.call(arguments, 3);
 
-    return function(context, options) {
+    var program = function(context, options) {
       options = options || {};
 
       return fn.apply(this, [context, options.data || data].concat(args));
     };
+    program.program = i;
+    program.depth = args.length;
+    return program;
   },
-  program: function(fn, data) {
-    return function(context, options) {
+  program: function(i, fn, data) {
+    var program = function(context, options) {
       options = options || {};
 
       return fn(context, options.data || data);
     };
+    program.program = i;
+    program.depth = 0;
+    return program;
   },
   noop: function() { return ""; },
   invokePartial: function(partial, name, context, helpers, partials, data) {