package pflag // -- string Valuetype stringValue string func newStringValue(val string, p *string) *stringValue {	*p = val	return (*stringValue)(p)} func (s *stringValue) Set(val string) error {	*s = stringValue(val)	return nil}func (s *stringValue) Type() string {	return "string"} func (s *stringValue) String() string { return string(*s) } func stringConv(sval string) (interface{}, error) {	return sval, nil} // GetString return the string value of a flag with the given namefunc (f *FlagSet) GetString(name string) (string, error) {	val, err := f.getFlagType(name, "string", stringConv)	if err != nil {		return "", err	}	return val.(string), nil} // StringVar defines a string flag with specified name, default value, and usage string.// The argument p points to a string variable in which to store the value of the flag.func (f *FlagSet) StringVar(p *string, name string, value string, usage string) {	f.VarP(newStringValue(value, p), name, "", usage)} // StringVarP is like StringVar, but accepts a shorthand letter that can be used after a single dash.func (f *FlagSet) StringVarP(p *string, name, shorthand string, value string, usage string) {	f.VarP(newStringValue(value, p), name, shorthand, usage)} // StringVar defines a string flag with specified name, default value, and usage string.// The argument p points to a string variable in which to store the value of the flag.func StringVar(p *string, name string, value string, usage string) {	CommandLine.VarP(newStringValue(value, p), name, "", usage)} // StringVarP is like StringVar, but accepts a shorthand letter that can be used after a single dash.func StringVarP(p *string, name, shorthand string, value string, usage string) {	CommandLine.VarP(newStringValue(value, p), name, shorthand, usage)} // String defines a string flag with specified name, default value, and usage string.// The return value is the address of a string variable that stores the value of the flag.func (f *FlagSet) String(name string, value string, usage string) *string {	p := new(string)	f.StringVarP(p, name, "", value, usage)	return p} // StringP is like String, but accepts a shorthand letter that can be used after a single dash.func (f *FlagSet) StringP(name, shorthand string, value string, usage string) *string {	p := new(string)	f.StringVarP(p, name, shorthand, value, usage)	return p} // String defines a string flag with specified name, default value, and usage string.// The return value is the address of a string variable that stores the value of the flag.func String(name string, value string, usage string) *string {	return CommandLine.StringP(name, "", value, usage)} // StringP is like String, but accepts a shorthand letter that can be used after a single dash.func StringP(name, shorthand string, value string, usage string) *string {	return CommandLine.StringP(name, shorthand, value, usage)}