gistfile1.rb

parser = File.open(outfile.path) { |f| LPC::Parser.new(f) }

return_val = parser.translation_unit

tokens = parser.input

tree = return_val.tree

# Everything is OK up to here.


node_stream = ANTLR3::CommonTreeNodeStream.new(tree)

optimizations = LPCTreeRewrites::TreeParser.new(node_stream)

tree = optimizations.downup(tree, false)

gistfile2.txt

$ ruby LPCTreeRewrites.rb --lexer-name "LPC::Lexer" --parser-name "LPC::Parser" --parser-rule "translation_unit" < foobar.cpp

/usr/home/pope/.rvm/gems/ruby-1.8.7-p248/gems/antlr3-1.8.8/lib/antlr3/main.rb:576:in `send': nil is not a symbol (TypeError)
        from /usr/home/pope/.rvm/gems/ruby-1.8.7-p248/gems/antlr3-1.8.8/lib/antlr3/main.rb:576:in `recognize'
        from /usr/home/pope/.rvm/gems/ruby-1.8.7-p248/gems/antlr3-1.8.8/lib/antlr3/main.rb:162:in `execute'
        from /usr/home/pope/.rvm/gems/ruby-1.8.7-p248/gems/antlr3-1.8.8/lib/antlr3/tree.rb:108:in `main'
        from LPCTreeRewrites.rb:297
        from LPCTreeRewrites.rb:297