Make the code emitter a compiler pass

This gives the compiler a more regular structure.

src/compiler.js

@@ -8,7 +8,8 @@ PEG.compiler = {
     "reportLeftRecursion",
     "removeProxyRules",
     "computeVarNames",
-    "computeParams"
+    "computeParams",
+    "generateCode"
   ],
 
   /*
@@ -24,7 +25,7 @@ PEG.compiler = {
       that.passes[passName](ast, options);
     });
 
-    var source = this.emitter(ast, options);
+    var source = ast.code;
     var result = eval(source);
     result._source = source;
 
@@ -33,4 +34,3 @@ PEG.compiler = {
 };
 
 // @include "compiler/passes.js"
-// @include "compiler/emitter.js"

src/compiler/passes.js

@@ -12,3 +12,4 @@ PEG.compiler.passes = {};
 // @include "passes/remove-proxy-rules.js"
 // @include "passes/compute-var-names.js"
 // @include "passes/compute-params.js"
+// @include "passes/generate-code.js"

src/compiler/passes/generate-code.js

@@ -1,5 +1,5 @@
-/* Emits the generated code for the AST. */
-PEG.compiler.emitter = function(ast, options) {
+/* Generates the parser code. */
+PEG.compiler.passes.generateCode = function(ast, options) {
   options = options || {};
   if (options.cache === undefined) {
     options.cache = false;
@@ -885,5 +885,5 @@ PEG.compiler.emitter = function(ast, options) {
     }
   });
 
-  return emit(ast);
+  ast.code = emit(ast);
 };