float64.go raw

   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  }
  85