lib/ebnf/base.rb in ebnf-0.3.6 vs lib/ebnf/base.rb in ebnf-0.3.7

@@ -188,9 +188,38 @@
     # @return [String]
     def to_html
       Writer.html(*ast)
     end
 
+    ##
+    # Output Ruby parser files
+    #
+    # @param [IO, StringIO] output
+    # @param [Hash{Symbol => Object}] options
+    # @option options [String] :grammarFile
+    def to_ruby(output = STDOUT, options = {})
+      self.build_tables
+      unless output == STDOUT
+        output.puts "# This file is automatically generated by #{__FILE__}"
+        output.puts "# BRANCH derived from #{options[:grammarFile]}" if options[:grammarFile]
+        unless self.errors.empty?
+          output.puts "# Note, tables completed with errors, may need to be resolved manually:"
+          #output.puts "#   #{pp.conflicts.map{|c| c.join("\n#      ")}.join("\n#   ")}"
+        end
+        output.puts "module #{options.fetch(:mod_name, 'Branch')}"
+        output.puts "  START = #{self.start.inspect}"
+        output.puts
+      end
+      self.outputTable(output, 'BRANCH', self.branch, 1)
+      self.outputTable(output, 'TERMINALS', self.terminals, 1)
+      self.outputTable(output, 'FIRST', self.first, 1)
+      self.outputTable(output, 'FOLLOW', self.follow, 1)
+      self.outputTable(output, 'PASS', [self.pass], 1) if self.pass
+      unless output == STDOUT
+        output.puts "end"
+      end
+    end
+
     def dup
       new_obj = super
       new_obj.instance_variable_set(:@ast, @ast.dup)
       new_obj
     end
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