class Haml::Exec::Generic

def parse!
  begin
    parse
  rescue Exception => e
    raise e if @options[:trace] || e.is_a?(SystemExit)
    $stderr.print "#{e.class}: " unless e.class == RuntimeError
    $stderr.puts "#{e.message}"
    $stderr.puts "  Use --trace for backtrace."
    exit 1
  end
  exit 0
end