Scott Baker | e7144bc | 2019-10-01 14:16:47 -0700 | [diff] [blame^] | 1 | package pflag |
| 2 | |
| 3 | import "strconv" |
| 4 | |
| 5 | // optional interface to indicate boolean flags that can be |
| 6 | // supplied without "=value" text |
| 7 | type boolFlag interface { |
| 8 | Value |
| 9 | IsBoolFlag() bool |
| 10 | } |
| 11 | |
| 12 | // -- bool Value |
| 13 | type boolValue bool |
| 14 | |
| 15 | func newBoolValue(val bool, p *bool) *boolValue { |
| 16 | *p = val |
| 17 | return (*boolValue)(p) |
| 18 | } |
| 19 | |
| 20 | func (b *boolValue) Set(s string) error { |
| 21 | v, err := strconv.ParseBool(s) |
| 22 | *b = boolValue(v) |
| 23 | return err |
| 24 | } |
| 25 | |
| 26 | func (b *boolValue) Type() string { |
| 27 | return "bool" |
| 28 | } |
| 29 | |
| 30 | func (b *boolValue) String() string { return strconv.FormatBool(bool(*b)) } |
| 31 | |
| 32 | func (b *boolValue) IsBoolFlag() bool { return true } |
| 33 | |
| 34 | func boolConv(sval string) (interface{}, error) { |
| 35 | return strconv.ParseBool(sval) |
| 36 | } |
| 37 | |
| 38 | // GetBool return the bool value of a flag with the given name |
| 39 | func (f *FlagSet) GetBool(name string) (bool, error) { |
| 40 | val, err := f.getFlagType(name, "bool", boolConv) |
| 41 | if err != nil { |
| 42 | return false, err |
| 43 | } |
| 44 | return val.(bool), nil |
| 45 | } |
| 46 | |
| 47 | // BoolVar defines a bool flag with specified name, default value, and usage string. |
| 48 | // The argument p points to a bool variable in which to store the value of the flag. |
| 49 | func (f *FlagSet) BoolVar(p *bool, name string, value bool, usage string) { |
| 50 | f.BoolVarP(p, name, "", value, usage) |
| 51 | } |
| 52 | |
| 53 | // BoolVarP is like BoolVar, but accepts a shorthand letter that can be used after a single dash. |
| 54 | func (f *FlagSet) BoolVarP(p *bool, name, shorthand string, value bool, usage string) { |
| 55 | flag := f.VarPF(newBoolValue(value, p), name, shorthand, usage) |
| 56 | flag.NoOptDefVal = "true" |
| 57 | } |
| 58 | |
| 59 | // BoolVar defines a bool flag with specified name, default value, and usage string. |
| 60 | // The argument p points to a bool variable in which to store the value of the flag. |
| 61 | func BoolVar(p *bool, name string, value bool, usage string) { |
| 62 | BoolVarP(p, name, "", value, usage) |
| 63 | } |
| 64 | |
| 65 | // BoolVarP is like BoolVar, but accepts a shorthand letter that can be used after a single dash. |
| 66 | func BoolVarP(p *bool, name, shorthand string, value bool, usage string) { |
| 67 | flag := CommandLine.VarPF(newBoolValue(value, p), name, shorthand, usage) |
| 68 | flag.NoOptDefVal = "true" |
| 69 | } |
| 70 | |
| 71 | // Bool defines a bool flag with specified name, default value, and usage string. |
| 72 | // The return value is the address of a bool variable that stores the value of the flag. |
| 73 | func (f *FlagSet) Bool(name string, value bool, usage string) *bool { |
| 74 | return f.BoolP(name, "", value, usage) |
| 75 | } |
| 76 | |
| 77 | // BoolP is like Bool, but accepts a shorthand letter that can be used after a single dash. |
| 78 | func (f *FlagSet) BoolP(name, shorthand string, value bool, usage string) *bool { |
| 79 | p := new(bool) |
| 80 | f.BoolVarP(p, name, shorthand, value, usage) |
| 81 | return p |
| 82 | } |
| 83 | |
| 84 | // Bool defines a bool flag with specified name, default value, and usage string. |
| 85 | // The return value is the address of a bool variable that stores the value of the flag. |
| 86 | func Bool(name string, value bool, usage string) *bool { |
| 87 | return BoolP(name, "", value, usage) |
| 88 | } |
| 89 | |
| 90 | // BoolP is like Bool, but accepts a shorthand letter that can be used after a single dash. |
| 91 | func BoolP(name, shorthand string, value bool, usage string) *bool { |
| 92 | b := CommandLine.BoolP(name, shorthand, value, usage) |
| 93 | return b |
| 94 | } |