api

var Usage = func() {
	fmt.Fprintf(os.Stderr, "Usage:\n")
	fmt.Fprintf(os.Stderr, "  %s [options] shell {flagfile}\n", os.Args[0])
	fmt.Fprintf(os.Stderr, "\tshell interactive mode\n")
	fmt.Fprintf(os.Stderr, "  %s [options] {source}\n", os.Args[0])
	fmt.Fprintf(os.Stderr, "\tparse single file\n")
	fmt.Fprintf(os.Stderr, "Options:\n")
	flag.PrintDefaults()
	os.Exit(1)
}