Ensure ruby parser returns all dictionary keys, regardless of whether or not there are elements in them.

bitshift/parser/__init__.py

@@ -12,12 +12,6 @@ from .python import parse_py
 
 __all__ = ["parse", "UnsupportedFileError", "start_parse_servers"]
 
-PARSERS = {
-    "Python": parse_py,
-    "Java": parse_via_server,
-    "Ruby": parse_via_server,
-}
-
 PARSER_COMMANDS = [
         ('Java', ['mvn', '-f',
             path.join(path.dirname(__file__), "../../parsers/java/pom.xml"),
@@ -120,6 +114,12 @@ def parse_via_server(codelet):
 
     codelet.symbols = symbols
 
+PARSERS = {
+    "Python": parse_py,
+    "Java": parse_via_server,
+    "Ruby": parse_via_server,
+}
+
 def parse(codelet):
     """
     Dispatches the codelet to the correct parser based on its language.
@@ -132,6 +132,7 @@ def parse(codelet):
     :type code: Codelet
     """
     lang = _lang(codelet)
+    lang_string = LANGS[lang]
     codelet.language = lang
-    if lang in PARSERS:
-        PARSERS[lang](codelet)
+    if lang_string in PARSERS:
+        PARSERS[lang_string](codelet)

parsers/ruby/lib/parser.rb

@@ -119,9 +119,11 @@ module Bitshift
         end
 
         def to_s
-            new_symbols = Hash.new {|hash, key| hash[key] = Hash.new}
+            new_symbols = Hash.new
 
             symbols.each do |type, sym_list|
+                new_symbols[type.to_s] = Hash.new
+
                 sym_list.each do |name, sym|
                     new_symbols[type.to_s][name.to_s] = {
                         "assignments" => sym[:assignments],