4 type stringValue string
6 func newStringValue(val string, p *string) *stringValue {
8 return (*stringValue)(p)
11 func (s *stringValue) Set(val string) error {
15 func (s *stringValue) Type() string {
19 func (s *stringValue) String() string { return string(*s) }
21 func stringConv(sval string) (interface{}, error) {
25 // GetString return the string value of a flag with the given name
26 func (f *FlagSet) GetString(name string) (string, error) {
27 val, err := f.getFlagType(name, "string", stringConv)
31 return val.(string), nil
34 // StringVar defines a string flag with specified name, default value, and usage string.
35 // The argument p points to a string variable in which to store the value of the flag.
36 func (f *FlagSet) StringVar(p *string, name string, value string, usage string) {
37 f.VarP(newStringValue(value, p), name, "", usage)
40 // StringVarP is like StringVar, but accepts a shorthand letter that can be used after a single dash.
41 func (f *FlagSet) StringVarP(p *string, name, shorthand string, value string, usage string) {
42 f.VarP(newStringValue(value, p), name, shorthand, usage)
45 // StringVar defines a string flag with specified name, default value, and usage string.
46 // The argument p points to a string variable in which to store the value of the flag.
47 func StringVar(p *string, name string, value string, usage string) {
48 CommandLine.VarP(newStringValue(value, p), name, "", usage)
51 // StringVarP is like StringVar, but accepts a shorthand letter that can be used after a single dash.
52 func StringVarP(p *string, name, shorthand string, value string, usage string) {
53 CommandLine.VarP(newStringValue(value, p), name, shorthand, usage)
56 // String defines a string flag with specified name, default value, and usage string.
57 // The return value is the address of a string variable that stores the value of the flag.
58 func (f *FlagSet) String(name string, value string, usage string) *string {
60 f.StringVarP(p, name, "", value, usage)
64 // StringP is like String, but accepts a shorthand letter that can be used after a single dash.
65 func (f *FlagSet) StringP(name, shorthand string, value string, usage string) *string {
67 f.StringVarP(p, name, shorthand, value, usage)
71 // String defines a string flag with specified name, default value, and usage string.
72 // The return value is the address of a string variable that stores the value of the flag.
73 func String(name string, value string, usage string) *string {
74 return CommandLine.StringP(name, "", value, usage)
77 // StringP is like String, but accepts a shorthand letter that can be used after a single dash.
78 func StringP(name, shorthand string, value string, usage string) *string {
79 return CommandLine.StringP(name, shorthand, value, usage)