Generator builds a Lexer, not a Lexer::DFA

assets/parser.d.erb

@@ -115,7 +115,7 @@ class <%= classname %>
             uint accepts;
         }
 
-<% transition_table, state_table = lexer_dfa.build_tables %>
+<% transition_table, state_table = lexer.dfa.build_tables %>
         private static const Transition transitions[] = [
 <% transition_table.each do |transition_table_entry| %>
             Transition(<%= transition_table_entry[:first] %>u, <%= transition_table_entry[:last] %>u, <%= transition_table_entry[:destination] %>u),