float64.go

Documentation: github.com/spf13/pflag

     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
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