gistfile1.vim

" Eval line
function! EvalLine() range
  let str = ""
  for i in range(a:firstline, a:lastline)
    let str = str . getline(i) . "\n"
  endfor
ruby << EOF
  require 'stringio'
  $stdout = StringIO.new
  begin
    result = eval(VIM.evaluate('str')).inspect
  rescue Exception => e
    result = e.class.name
  end
  unless $stdout.string.empty?
    result = $stdout.string
  end
  result.split(/\n/).reverse_each do |line|
    $curbuf.append VIM.evaluate('a:lastline').to_i, line
  end
EOF
endfunction