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float64.go (3105B)

      1 package pflag
      2 
      3 import "strconv"
      4 
      5 // -- float64 Value
      6 type float64Value float64
      7 
      8 func newFloat64Value(val float64, p *float64) *float64Value {
      9 	*p = val
     10 	return (*float64Value)(p)
     11 }
     12 
     13 func (f *float64Value) Set(s string) error {
     14 	v, err := strconv.ParseFloat(s, 64)
     15 	*f = float64Value(v)
     16 	return err
     17 }
     18 
     19 func (f *float64Value) Type() string {
     20 	return "float64"
     21 }
     22 
     23 func (f *float64Value) String() string { return strconv.FormatFloat(float64(*f), 'g', -1, 64) }
     24 
     25 func float64Conv(sval string) (interface{}, error) {
     26 	return strconv.ParseFloat(sval, 64)
     27 }
     28 
     29 // GetFloat64 return the float64 value of a flag with the given name
     30 func (f *FlagSet) GetFloat64(name string) (float64, error) {
     31 	val, err := f.getFlagType(name, "float64", float64Conv)
     32 	if err != nil {
     33 		return 0, err
     34 	}
     35 	return val.(float64), nil
     36 }
     37 
     38 // Float64Var defines a float64 flag with specified name, default value, and usage string.
     39 // The argument p points to a float64 variable in which to store the value of the flag.
     40 func (f *FlagSet) Float64Var(p *float64, name string, value float64, usage string) {
     41 	f.VarP(newFloat64Value(value, p), name, "", usage)
     42 }
     43 
     44 // Float64VarP is like Float64Var, but accepts a shorthand letter that can be used after a single dash.
     45 func (f *FlagSet) Float64VarP(p *float64, name, shorthand string, value float64, usage string) {
     46 	f.VarP(newFloat64Value(value, p), name, shorthand, usage)
     47 }
     48 
     49 // Float64Var defines a float64 flag with specified name, default value, and usage string.
     50 // The argument p points to a float64 variable in which to store the value of the flag.
     51 func Float64Var(p *float64, name string, value float64, usage string) {
     52 	CommandLine.VarP(newFloat64Value(value, p), name, "", usage)
     53 }
     54 
     55 // Float64VarP is like Float64Var, but accepts a shorthand letter that can be used after a single dash.
     56 func Float64VarP(p *float64, name, shorthand string, value float64, usage string) {
     57 	CommandLine.VarP(newFloat64Value(value, p), name, shorthand, usage)
     58 }
     59 
     60 // Float64 defines a float64 flag with specified name, default value, and usage string.
     61 // The return value is the address of a float64 variable that stores the value of the flag.
     62 func (f *FlagSet) Float64(name string, value float64, usage string) *float64 {
     63 	p := new(float64)
     64 	f.Float64VarP(p, name, "", value, usage)
     65 	return p
     66 }
     67 
     68 // Float64P is like Float64, but accepts a shorthand letter that can be used after a single dash.
     69 func (f *FlagSet) Float64P(name, shorthand string, value float64, usage string) *float64 {
     70 	p := new(float64)
     71 	f.Float64VarP(p, name, shorthand, value, usage)
     72 	return p
     73 }
     74 
     75 // Float64 defines a float64 flag with specified name, default value, and usage string.
     76 // The return value is the address of a float64 variable that stores the value of the flag.
     77 func Float64(name string, value float64, usage string) *float64 {
     78 	return CommandLine.Float64P(name, "", value, usage)
     79 }
     80 
     81 // Float64P is like Float64, but accepts a shorthand letter that can be used after a single dash.
     82 func Float64P(name, shorthand string, value float64, usage string) *float64 {
     83 	return CommandLine.Float64P(name, shorthand, value, usage)
     84 }