43 lines
944 B
Go
43 lines
944 B
Go
package getopt
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import (
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"flag"
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"strconv"
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)
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type boolFlag interface {
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flag.Value
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IsBoolFlag() bool
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}
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type boolVal bool
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func (b *boolVal) String() string {
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return strconv.FormatBool(bool(*b))
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}
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func (b *boolVal) Set(val string) error {
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*b = boolVal(true)
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return nil
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}
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func (b *boolVal) IsBoolFlag() bool {
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return true
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}
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// BoolVar defines a bool flag with specified name, default value, and
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// usage string. The argument p points to a bool variable in which to
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// store the value of the flag.
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func (set *FlagSet) BoolVar(p *bool, name string, value bool, usage string) {
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*p = value
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set.Var((*boolVal)(p), name, usage)
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}
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// Bool defines a bool flag with specified name, default value, and
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// usage string. The return value is the address of a bool variable that
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// stores the value of the flag.
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func (set *FlagSet) Bool(name string, value bool, usage string) *bool {
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var b bool
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set.BoolVar(&b, name, value, usage)
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return &b
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}
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