Explore how to debug Xtext grammar with Antlrworks @0.7

devjournal.md

@@ -95,10 +95,19 @@
     The referrred `[Class]` will not create a new class name, but expects an existing name
   * Syntactic predicate denoted as `=>`.
 
+* Debugging Xtext grammar with Antlrworks
+  * The grammar generated doesn't compile, it's looking for a class
+   `DebugAbstractInternalAntlrParser` which cannot be found anywhere
+  * Xtext [claims to have new stuff for debugging][8].
+    New stuff includes a railroad diagram (`Views->Xtext->Xtext Syntax Graph`).
+    It also refers to a new generator fragment, `org.eclipse.xtext.generator.parser.antlr.DebugAntlrGeneratorFragment`
+    which I don't know yet how to use.
+
   [1]: http://jevopisdeveloperblog.blogspot.com/2011/03/implement-tostring-with-xtexts.html
   [2]: http://www.eclipse.org/Xtext/documentation/2_1_0/100-serialization.php#serializationcontract 
   [3]: http://stackoverflow.com/questions/8154790/visualize-lalr-grammar
   [4]: http://goldparser.org/
   [5]: http://stackoverflow.com/questions/8263772/left-factoring-grammar-of-coffeescript-expressions
   [6]: http://stackoverflow.com/questions/8279790/convert-simple-antlr-grammar-to-xtext
   [7]: http://stackoverflow.com/questions/8302333/xtext-grammar-in-two-files
+  [8]: http://eclipse.org/Xtext/documentation/indigo/new_and_noteworthy.php

make.py

@@ -92,11 +92,17 @@ def call_antlrworks(antlrworks_jar, class_path, prj, grammar):
     Set up classpath and call antlrworks to debug grammar
     """
     prj_bin = '{prj}/bin'.format(prj=prj)
-    real_class_path = os.pathsep.join(class_path + [prj_bin])
+    real_class_path = os.pathsep.join(class_path + [prj_bin, antlrworks_jar])
+    main_class = 'org.antlr.works.IDE'
+    grammar_file = '{prj}/src-gen/{prj}/parser/antlr/internal/Internal{grammar}.g'.format(prj=prj, grammar=grammar)
+    print grammar_file
     raw_cmd = '''
-        java -cp {classpath} -jar {antlrworks_jar}
+        java -cp {classpath} {main_class} -open {grammar_file}
     '''
-    cmd = raw_cmd.format(classpath=real_class_path, antlrworks_jar=antlrworks_jar).split()
+    cmd = raw_cmd.format(\
+        classpath=real_class_path,
+        main_class=main_class,
+        grammar_file=grammar_file).split()
     call(cmd)
 
 def main():