AdGuardHome/internal/next/configmgr/error.go

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package configmgr
import (
"fmt"
"github.com/AdguardTeam/golibs/timeutil"
"golang.org/x/exp/constraints"
)
// numberOrDuration is the constraint for integer types along with
// timeutil.Duration.
type numberOrDuration interface {
constraints.Integer | timeutil.Duration
}
// newMustBePositiveError returns an error about the value that must be positive
// but isn't. prop is the name of the property to mention in the error message.
//
// TODO(a.garipov): Consider moving such helpers to golibs and use in AdGuardDNS
// as well.
func newMustBePositiveError[T numberOrDuration](prop string, v T) (err error) {
if s, ok := any(v).(fmt.Stringer); ok {
return fmt.Errorf("%s must be positive, got %s", prop, s)
}
return fmt.Errorf("%s must be positive, got %d", prop, v)
}