2025-01-06 22:25:31 +01:00

26 lines
317 B
Go

package utilities
import (
"fmt"
"sync"
)
func Singleton[T any](init func() (T, error)) func() T {
var (
once sync.Once
t T
)
return func() T {
once.Do(func() {
var err error
t, err = init()
if err != nil {
panic(fmt.Sprintf("creating %T failed: %s", t, err))
}
})
return t
}
}