Begin using whittle to parse preprocessor output

lib/cxl/cxl/lib/cxl.rb

@@ -7,8 +7,7 @@ module Cxl
   class << self
 
     def compile_to(input_fname, output_fname, cppflags)
-      parser = Parser.new(input_fname, cppflags)
+      parsed = Parser.load(input_fname, cppflags)
-      parsed = parser.parse
 
       0
     end

lib/cxl/cxl/lib/cxl/parser.rb

@@ -1,24 +1,34 @@
 require "open3"
+require "whittle"
 
 module Cxl
-  class Parser
+  class Parser < Whittle::Parser
+    rule(:tok => /./)
+    rule(:eol => "\n")
 
-    def initialize(fname, cppflags)
+    rule(:translation_unit) do |r|
-      @fname = fname
+      r[]
-      @cppflags = cppflags
+      r[:translation_unit, :tok]
+      r[:translation_unit, :eol]
     end
 
-    def parse
+    start(:translation_unit)
-      c_preprocessor_command = Config.instance.c_preprocessor
+
-      command = c_preprocessor_command + @cppflags + [@fname]
+    class << self
-      pp_out, pp_err, status = Open3.capture3(*command)
+
-      if pp_err != ""
+      def load(fname, cppflags)
-        $stderr.write(pp_err)
+        c_preprocessor_command = Config.instance.c_preprocessor
+        command = c_preprocessor_command + cppflags + [fname]
+        pp_out, pp_err, status = Open3.capture3(*command)
+        if pp_err != ""
+          $stderr.write(pp_err)
+        end
+        if status != 0
+          return
+        end
+        Parser.new.parse(pp_out)
       end
-      if status != 0
+
-        return
-      end
-      puts pp_out.lines[0, 2]
     end
 
   end