Add Generator class

lib/imbecile/generator.rb

@@ -0,0 +1,22 @@
+module Imbecile
+
+  # Class to generate the parser generator source.
+  class Generator
+
+    def initialize(grammar)
+      @grammar = grammar
+    end
+
+    def generate(output_file)
+      lexer_dfa = LexerDFA.new(@grammar.tokens)
+      classname = @grammar.classname || output_file.sub(%r{[^a-zA-Z0-9].*}, "").capitalize
+      erb = ERB.new(File.read(File.join(File.dirname(File.expand_path(__FILE__)), "../../assets/parser.d.erb")), nil, "<>")
+      result = erb.result(binding.clone)
+      File.open(output_file, "wb") do |fh|
+        fh.write(result)
+      end
+    end
+
+  end
+
+end