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package pflag
// -- func Value
type boolfuncValue func(string) error
func (f boolfuncValue) Set(s string) error { return f(s) }
func (f boolfuncValue) Type() string { return "boolfunc" }
func (f boolfuncValue) String() string { return "" } // same behavior as stdlib 'flag' package
func (f boolfuncValue) IsBoolFlag() bool { return true }
// BoolFunc defines a func flag with specified name, callback function and usage string.
//
// The callback function will be called every time "--{name}" (or any form that matches the flag) is parsed
// on the command line.
func (f *FlagSet) BoolFunc(name string, usage string, fn func(string) error) {
f.BoolFuncP(name, "", usage, fn)
}
// BoolFuncP is like BoolFunc, but accepts a shorthand letter that can be used after a single dash.
func (f *FlagSet) BoolFuncP(name, shorthand string, usage string, fn func(string) error) {
var val Value = boolfuncValue(fn)
flag := f.VarPF(val, name, shorthand, usage)
flag.NoOptDefVal = "true"
}
// BoolFunc defines a func flag with specified name, callback function and usage string.
//
// The callback function will be called every time "--{name}" (or any form that matches the flag) is parsed
// on the command line.
func BoolFunc(name string, usage string, fn func(string) error) {
CommandLine.BoolFuncP(name, "", usage, fn)
}
// BoolFuncP is like BoolFunc, but accepts a shorthand letter that can be used after a single dash.
func BoolFuncP(name, shorthand string, usage string, fn func(string) error) {
CommandLine.BoolFuncP(name, shorthand, usage, fn)
}
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