var (
	rewrite    func(*token.FileSet, *ast.File) *ast.File
	parserMode parser.Mode
)

func usage() {
	fmt.Fprintf(os.Stderr, "usage: gofmt [flags] [path ...]\n")
	flag.PrintDefaults()
}

func initParserMode() {
	parserMode = parser.ParseComments
	if *allErrors {
		parserMode |= parser.AllErrors
	}
	// It's only -r that makes use of go/ast's object resolution,
	// so avoid the unnecessary work if the flag isn't used.