fix field default values

lib/parser/basic_types.rb

@@ -39,9 +39,9 @@ module Parser
     rule(:type) { (str("int") | str("ref")).as(:type) >> space }
     # identifier must start with lower case
     # TODO rule forbit names like if_true, because it starts with a keyword. a little looser please!
-    rule(:name)   { keyword.absent? >> (match['a-z_'] >> match['a-zA-Z0-9_'].repeat).as(:name)  >> space? }
+    rule(:name)   { (keyword|type).absent? >> (match['a-z_'] >> match['a-zA-Z0-9_'].repeat).as(:name)  >> space? }
     # fields have type
-    rule(:field) { type >> name }
+    rule(:field) { type >> name >> (assign >> value_expression.as(:value) ).maybe}
     # and class/module names must start with capital
     # (admittatly the rule matches constants too, but one step at a time)
     rule(:module_name) { keyword.absent? >> (match['A-Z'] >> match['a-zA-Z0-9_'].repeat).as(:module_name)  >> space? }

lib/parser/transform.rb

@@ -15,6 +15,8 @@ module Parser
     rule(:integer => simple(:value)) { s(:int ,value.to_i) }
     rule(:name   => simple(:name))  { s(:name , name.to_sym) }
     rule(:type   => simple(:type), :name   => simple(:name))  { s(:field_def , type.to_sym , name.to_sym) }
+    rule(:type   => simple(:type), :name   => simple(:name) , :value => simple(:value))  {
+      s(:field_def , type.to_sym , name.to_sym , value ) }
 
     rule(:module_name   => simple(:module_name))  { s(:module,module_name.to_s) }