1package pflag 2 3// -- string Value 4type stringValue string 5 6func newStringValue(val string, p *string) *stringValue { 7 *p = val 8 return (*stringValue)(p) 9} 10 11func (s *stringValue) Set(val string) error { 12 *s = stringValue(val) 13 return nil 14} 15func (s *stringValue) Type() string { 16 return "string" 17} 18 19func (s *stringValue) String() string { return string(*s) } 20 21func stringConv(sval string) (interface{}, error) { 22 return sval, nil 23} 24 25// GetString return the string value of a flag with the given name 26func (f *FlagSet) GetString(name string) (string, error) { 27 val, err := f.getFlagType(name, "string", stringConv) 28 if err != nil { 29 return "", err 30 } 31 return val.(string), nil 32} 33 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. 36func (f *FlagSet) StringVar(p *string, name string, value string, usage string) { 37 f.VarP(newStringValue(value, p), name, "", usage) 38} 39 40// StringVarP is like StringVar, but accepts a shorthand letter that can be used after a single dash. 41func (f *FlagSet) StringVarP(p *string, name, shorthand string, value string, usage string) { 42 f.VarP(newStringValue(value, p), name, shorthand, usage) 43} 44 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. 47func StringVar(p *string, name string, value string, usage string) { 48 CommandLine.VarP(newStringValue(value, p), name, "", usage) 49} 50 51// StringVarP is like StringVar, but accepts a shorthand letter that can be used after a single dash. 52func StringVarP(p *string, name, shorthand string, value string, usage string) { 53 CommandLine.VarP(newStringValue(value, p), name, shorthand, usage) 54} 55 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. 58func (f *FlagSet) String(name string, value string, usage string) *string { 59 p := new(string) 60 f.StringVarP(p, name, "", value, usage) 61 return p 62} 63 64// StringP is like String, but accepts a shorthand letter that can be used after a single dash. 65func (f *FlagSet) StringP(name, shorthand string, value string, usage string) *string { 66 p := new(string) 67 f.StringVarP(p, name, shorthand, value, usage) 68 return p 69} 70 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. 73func String(name string, value string, usage string) *string { 74 return CommandLine.StringP(name, "", value, usage) 75} 76 77// StringP is like String, but accepts a shorthand letter that can be used after a single dash. 78func StringP(name, shorthand string, value string, usage string) *string { 79 return CommandLine.StringP(name, shorthand, value, usage) 80} 81