int_slice.go

Documentation: github.com/spf13/pflag

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