Renamed some properties of the |PEG| object

1. |PEG.Compiler| -> |PEG.compiler|
2. |PEG.grammarParser| -> |PEG.parser|

This brings us closer to the desired structure of the PEG object, which
is:

  +-PEG
    |- parser
    +- compiler
       |- checks
       |- passes
       +- emitter

These are the only things (together with the |PEG.buildParser| function
and exceptions) that I want to be publicly accessible -- as extension
points and also for easy testing of PEG.js's components.

Rakefile

@@ -1,4 +1,4 @@
 desc "Generate the grammar parser"
 task :metaparser do
-  system "bin/pegjs PEG.grammarParser lib/metagrammar.pegjs"
+  system "bin/pegjs PEG.parser lib/metagrammar.pegjs"
 end

lib/compiler.js

@@ -12,13 +12,13 @@
  * The grammar must be a string in the format described by the metagramar in the
  * metagrammar.pegjs file.
  *
- * Throws |PEG.grammarParser.SyntaxError| if the grammar contains a syntax error
- * or |PEG.GrammarError| if it contains a semantic error. Note that not all
- * errors are detected during the generation and some may protrude to the
- * generated parser and cause its malfunction.
+ * Throws |PEG.parser.SyntaxError| if the grammar contains a syntax error or
+ * |PEG.GrammarError| if it contains a semantic error. Note that not all errors
+ * are detected during the generation and some may protrude to the generated
+ * parser and cause its malfunction.
  */
 PEG.buildParser = function(grammar) {
-  return PEG.Compiler.compileParser(PEG.grammarParser.parse(grammar));
+  return PEG.compiler.compileParser(PEG.parser.parse(grammar));
 };
 
 /* ===== PEG.GrammarError ===== */
@@ -127,9 +127,9 @@ PEG.RegExpUtils = {
   }
 };
 
-/* ===== PEG.Compiler ===== */
+/* ===== PEG.compiler ===== */
 
-PEG.Compiler = {
+PEG.compiler = {
   /*
    * Generates a parser from a specified grammar AST. Throws |PEG.GrammarError|
    * if the AST contains a semantic error. Note that not all errors are detected
@@ -160,7 +160,7 @@ PEG.Compiler = {
  * |PEG.GrammarError|. The checks are run in sequence in order of their
  * definition.
  */
-PEG.Compiler.checks = [
+PEG.compiler.checks = [
   /* Checks that all referenced rules exist. */
   function(ast) {
     function nop() {}
@@ -287,7 +287,7 @@ PEG.Compiler.checks = [
  * modified in-place by the pass. The passes are run in sequence in order of
  * their definition.
  */
-PEG.Compiler.passes = [
+PEG.compiler.passes = [
   /*
    * Removes proxy rules -- that is, rules that only delegate to other rule.
    */
@@ -366,7 +366,7 @@ PEG.Compiler.passes = [
 ];
 
 /* Emits the generated code for the AST. */
-PEG.Compiler.emitter = function(ast) {
+PEG.compiler.emitter = function(ast) {
   /*
    * Takes parts of code, interpolates variables inside them and joins them with
    * a newline.
@@ -477,7 +477,7 @@ PEG.Compiler.emitter = function(ast) {
         "     * Parses the input with a generated parser. If the parsing is successfull,",
         "     * returns a value explicitly or implicitly specified by the grammar from",
         "     * which the parser was generated (see |PEG.buildParser|). If the parsing is",
-        "     * unsuccessful, throws |PEG.grammarParser.SyntaxError| describing the error.",
+        "     * unsuccessful, throws |PEG.parser.SyntaxError| describing the error.",
         "     */",
         "    parse: function(input) {",
         "      var pos = 0;",

lib/metagrammar.js

@@ -1,4 +1,4 @@
-PEG.grammarParser = (function(){
+PEG.parser = (function(){
   /* Generated by PEG.js (http://pegjs.majda.cz/). */
   
   var result = {
@@ -6,7 +6,7 @@ PEG.grammarParser = (function(){
      * Parses the input with a generated parser. If the parsing is successfull,
      * returns a value explicitly or implicitly specified by the grammar from
      * which the parser was generated (see |PEG.buildParser|). If the parsing is
-     * unsuccessful, throws |PEG.grammarParser.SyntaxError| describing the error.
+     * unsuccessful, throws |PEG.parser.SyntaxError| describing the error.
      */
     parse: function(input) {
       var pos = 0;

test/compiler-test.js

@@ -124,7 +124,7 @@ module("PEG");
 test("buildParser reports syntax errors in the grammar", function() {
   throws(
     function() { PEG.buildParser(''); },
-    PEG.grammarParser.SyntaxError
+    PEG.parser.SyntaxError
   );
 });
 

test/metagrammar-test.js

@@ -5,15 +5,15 @@ var global = this;
 /* ===== Helpers ===== */
 
 global.grammarParserParses = function(input, expected) {
-  global.parses(PEG.grammarParser, input, expected);
+  global.parses(PEG.parser, input, expected);
 };
 
 global.grammarParserDoesNotParse = function(input) {
-  global.doesNotParse(PEG.grammarParser, input);
+  global.doesNotParse(PEG.parser, input);
 }
 
 global.grammarParserDoesNotParseWithMessage = function(input, message) {
-  global.doesNotParseWithMessage(PEG.grammarParser, input, message);
+  global.doesNotParseWithMessage(PEG.parser, input, message);
 }
 
 /* ===== Grammar Parser ===== */