57 lines
1.5 KiB
Go
57 lines
1.5 KiB
Go
package main
|
|
|
|
import (
|
|
"strconv"
|
|
"time"
|
|
)
|
|
|
|
// funcVar is a type of flag that accepts a function that is the string given
|
|
// by the user.
|
|
type funcVar func(s string) error
|
|
|
|
func (f funcVar) Set(s string) error { return f(s) }
|
|
func (f funcVar) String() string { return "" }
|
|
func (f funcVar) IsBoolFlag() bool { return false }
|
|
|
|
// funcBoolVar is a type of flag that accepts a function, converts the user's
|
|
// value to a bool, and then calls the given function.
|
|
type funcBoolVar func(b bool) error
|
|
|
|
func (f funcBoolVar) Set(s string) error {
|
|
v, err := strconv.ParseBool(s)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return f(v)
|
|
}
|
|
func (f funcBoolVar) String() string { return "" }
|
|
func (f funcBoolVar) IsBoolFlag() bool { return true }
|
|
|
|
// funcDurationVar is a type of flag that accepts a function, converts the
|
|
// user's value to a duration, and then calls the given function.
|
|
type funcDurationVar func(d time.Duration) error
|
|
|
|
func (f funcDurationVar) Set(s string) error {
|
|
v, err := time.ParseDuration(s)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return f(v)
|
|
}
|
|
func (f funcDurationVar) String() string { return "" }
|
|
func (f funcDurationVar) IsBoolFlag() bool { return false }
|
|
|
|
// funcIntVar is a type of flag that accepts a function, converts the
|
|
// user's value to a int, and then calls the given function.
|
|
type funcIntVar func(i int) error
|
|
|
|
func (f funcIntVar) Set(s string) error {
|
|
v, err := strconv.ParseInt(s, 10, 32)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return f(int(v))
|
|
}
|
|
func (f funcIntVar) String() string { return "" }
|
|
func (f funcIntVar) IsBoolFlag() bool { return false }
|