float64_slice.go

Documentation: github.com/spf13/pflag

     1  package pflag
     2  
     3  import (
     4  	"fmt"
     5  	"strconv"
     6  	"strings"
     7  )
     8  
     9  // -- float64Slice Value
    10  type float64SliceValue struct {
    11  	value   *[]float64
    12  	changed bool
    13  }
    14  
    15  func newFloat64SliceValue(val []float64, p *[]float64) *float64SliceValue {
    16  	isv := new(float64SliceValue)
    17  	isv.value = p
    18  	*isv.value = val
    19  	return isv
    20  }
    21  
    22  func (s *float64SliceValue) Set(val string) error {
    23  	ss := strings.Split(val, ",")
    24  	out := make([]float64, len(ss))
    25  	for i, d := range ss {
    26  		var err error
    27  		out[i], err = strconv.ParseFloat(d, 64)
    28  		if err != nil {
    29  			return err
    30  		}
    31  
    32  	}
    33  	if !s.changed {
    34  		*s.value = out
    35  	} else {
    36  		*s.value = append(*s.value, out...)
    37  	}
    38  	s.changed = true
    39  	return nil
    40  }
    41  
    42  func (s *float64SliceValue) Type() string {
    43  	return "float64Slice"
    44  }
    45  
    46  func (s *float64SliceValue) String() string {
    47  	out := make([]string, len(*s.value))
    48  	for i, d := range *s.value {
    49  		out[i] = fmt.Sprintf("%f", d)
    50  	}
    51  	return "[" + strings.Join(out, ",") + "]"
    52  }
    53  
    54  func (s *float64SliceValue) fromString(val string) (float64, error) {
    55  	return strconv.ParseFloat(val, 64)
    56  }
    57  
    58  func (s *float64SliceValue) toString(val float64) string {
    59  	return fmt.Sprintf("%f", val)
    60  }
    61  
    62  func (s *float64SliceValue) Append(val string) error {
    63  	i, err := s.fromString(val)
    64  	if err != nil {
    65  		return err
    66  	}
    67  	*s.value = append(*s.value, i)
    68  	return nil
    69  }
    70  
    71  func (s *float64SliceValue) Replace(val []string) error {
    72  	out := make([]float64, len(val))
    73  	for i, d := range val {
    74  		var err error
    75  		out[i], err = s.fromString(d)
    76  		if err != nil {
    77  			return err
    78  		}
    79  	}
    80  	*s.value = out
    81  	return nil
    82  }
    83  
    84  func (s *float64SliceValue) GetSlice() []string {
    85  	out := make([]string, len(*s.value))
    86  	for i, d := range *s.value {
    87  		out[i] = s.toString(d)
    88  	}
    89  	return out
    90  }
    91  
    92  func float64SliceConv(val string) (interface{}, error) {
    93  	val = strings.Trim(val, "[]")
    94  	// Empty string would cause a slice with one (empty) entry
    95  	if len(val) == 0 {
    96  		return []float64{}, nil
    97  	}
    98  	ss := strings.Split(val, ",")
    99  	out := make([]float64, len(ss))
   100  	for i, d := range ss {
   101  		var err error
   102  		out[i], err = strconv.ParseFloat(d, 64)
   103  		if err != nil {
   104  			return nil, err
   105  		}
   106  
   107  	}
   108  	return out, nil
   109  }
   110  
   111  // GetFloat64Slice return the []float64 value of a flag with the given name
   112  func (f *FlagSet) GetFloat64Slice(name string) ([]float64, error) {
   113  	val, err := f.getFlagType(name, "float64Slice", float64SliceConv)
   114  	if err != nil {
   115  		return []float64{}, err
   116  	}
   117  	return val.([]float64), nil
   118  }
   119  
   120  // Float64SliceVar defines a float64Slice flag with specified name, default value, and usage string.
   121  // The argument p points to a []float64 variable in which to store the value of the flag.
   122  func (f *FlagSet) Float64SliceVar(p *[]float64, name string, value []float64, usage string) {
   123  	f.VarP(newFloat64SliceValue(value, p), name, "", usage)
   124  }
   125  
   126  // Float64SliceVarP is like Float64SliceVar, but accepts a shorthand letter that can be used after a single dash.
   127  func (f *FlagSet) Float64SliceVarP(p *[]float64, name, shorthand string, value []float64, usage string) {
   128  	f.VarP(newFloat64SliceValue(value, p), name, shorthand, usage)
   129  }
   130  
   131  // Float64SliceVar defines a float64[] flag with specified name, default value, and usage string.
   132  // The argument p points to a float64[] variable in which to store the value of the flag.
   133  func Float64SliceVar(p *[]float64, name string, value []float64, usage string) {
   134  	CommandLine.VarP(newFloat64SliceValue(value, p), name, "", usage)
   135  }
   136  
   137  // Float64SliceVarP is like Float64SliceVar, but accepts a shorthand letter that can be used after a single dash.
   138  func Float64SliceVarP(p *[]float64, name, shorthand string, value []float64, usage string) {
   139  	CommandLine.VarP(newFloat64SliceValue(value, p), name, shorthand, usage)
   140  }
   141  
   142  // Float64Slice defines a []float64 flag with specified name, default value, and usage string.
   143  // The return value is the address of a []float64 variable that stores the value of the flag.
   144  func (f *FlagSet) Float64Slice(name string, value []float64, usage string) *[]float64 {
   145  	p := []float64{}
   146  	f.Float64SliceVarP(&p, name, "", value, usage)
   147  	return &p
   148  }
   149  
   150  // Float64SliceP is like Float64Slice, but accepts a shorthand letter that can be used after a single dash.
   151  func (f *FlagSet) Float64SliceP(name, shorthand string, value []float64, usage string) *[]float64 {
   152  	p := []float64{}
   153  	f.Float64SliceVarP(&p, name, shorthand, value, usage)
   154  	return &p
   155  }
   156  
   157  // Float64Slice defines a []float64 flag with specified name, default value, and usage string.
   158  // The return value is the address of a []float64 variable that stores the value of the flag.
   159  func Float64Slice(name string, value []float64, usage string) *[]float64 {
   160  	return CommandLine.Float64SliceP(name, "", value, usage)
   161  }
   162  
   163  // Float64SliceP is like Float64Slice, but accepts a shorthand letter that can be used after a single dash.
   164  func Float64SliceP(name, shorthand string, value []float64, usage string) *[]float64 {
   165  	return CommandLine.Float64SliceP(name, shorthand, value, usage)
   166  }
   167
View as plain text