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package errors
import "fmt"
// fatalError is an error that should be printed to the user, then the program
// should exit with an error code.
type fatalError string
func (e fatalError) Error() string {
return string(e)
}
func (e fatalError) Fatal() bool {
return true
}
// Fataler is an error which should be printed to the user directly.
// Afterwards, the program should exit with an error.
type Fataler interface {
Fatal() bool
}
// IsFatal returns true if err is a fatal message that should be printed to the
// user. Then, the program should exit.
func IsFatal(err error) bool {
e, ok := err.(Fataler)
return ok && e.Fatal()
}
// Fatal returns a wrapped error which implements the Fataler interface.
func Fatal(s string) error {
return Wrap(fatalError(s), "Fatal")
}
// Fatalf returns an error which implements the Fataler interface.
func Fatalf(s string, data ...interface{}) error {
return Wrap(fatalError(fmt.Sprintf(s, data...)), "Fatal")
}
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