text: package pflag
  
  import (
  	"fmt"
  	"strconv"
  )
  
  // -- float64 Value
  type float64Value float64
  
  func newFloat64Value(val float64, p *float64) *float64Value {
  	*p = val
  	return (*float64Value)(p)
  }
  
  func (f *float64Value) Set(s string) error {
  	v, err := strconv.ParseFloat(s, 64)
  	*f = float64Value(v)
  	return err
  }
  
  func (f *float64Value) Type() string {
  	return "float64"
  }
  
  func (f *float64Value) String() string { return fmt.Sprintf("%v", *f) }
  
  func float64Conv(sval string) (interface{}, error) {
  	return strconv.ParseFloat(sval, 64)
  }
  
  // GetFloat64 return the float64 value of a flag with the given name
  func (f *FlagSet) GetFloat64(name string) (float64, error) {
  	val, err := f.getFlagType(name, "float64", float64Conv)
  	if err != nil {
  		return 0, err
  	}
  	return val.(float64), nil
  }
  
  // Float64Var defines a float64 flag with specified name, default value, and usage string.
  // The argument p points to a float64 variable in which to store the value of the flag.
  func (f *FlagSet) Float64Var(p *float64, name string, value float64, usage string) {
  	f.VarP(newFloat64Value(value, p), name, "", usage)
  }
  
  // Float64VarP is like Float64Var, but accepts a shorthand letter that can be used after a single dash.
  func (f *FlagSet) Float64VarP(p *float64, name, shorthand string, value float64, usage string) {
  	f.VarP(newFloat64Value(value, p), name, shorthand, usage)
  }
  
  // Float64Var defines a float64 flag with specified name, default value, and usage string.
  // The argument p points to a float64 variable in which to store the value of the flag.
  func Float64Var(p *float64, name string, value float64, usage string) {
  	CommandLine.VarP(newFloat64Value(value, p), name, "", usage)
  }
  
  // Float64VarP is like Float64Var, but accepts a shorthand letter that can be used after a single dash.
  func Float64VarP(p *float64, name, shorthand string, value float64, usage string) {
  	CommandLine.VarP(newFloat64Value(value, p), name, shorthand, usage)
  }
  
  // Float64 defines a float64 flag with specified name, default value, and usage string.
  // The return value is the address of a float64 variable that stores the value of the flag.
  func (f *FlagSet) Float64(name string, value float64, usage string) *float64 {
  	p := new(float64)
  	f.Float64VarP(p, name, "", value, usage)
  	return p
  }
  
  // Float64P is like Float64, but accepts a shorthand letter that can be used after a single dash.
  func (f *FlagSet) Float64P(name, shorthand string, value float64, usage string) *float64 {
  	p := new(float64)
  	f.Float64VarP(p, name, shorthand, value, usage)
  	return p
  }
  
  // Float64 defines a float64 flag with specified name, default value, and usage string.
  // The return value is the address of a float64 variable that stores the value of the flag.
  func Float64(name string, value float64, usage string) *float64 {
  	return CommandLine.Float64P(name, "", value, usage)
  }
  
  // Float64P is like Float64, but accepts a shorthand letter that can be used after a single dash.
  func Float64P(name, shorthand string, value float64, usage string) *float64 {
  	return CommandLine.Float64P(name, shorthand, value, usage)
  }
  