Function isNilDriverValuer

pgtype/pgtype.go:2040–2067

isNilDriverValuer returns true if value is any type of nil unless it implements driver.Valuer. *T is not considered to implement driver.Valuer if it is only implemented by T.

(value any)

// isNilDriverValuer returns true if value is any type of nil unless it implements driver.Valuer. *T is not considered to implement
// driver.Valuer if it is only implemented by T.
func isNilDriverValuer(value any) (isNil, callNilDriverValuer bool) {
	if value == nil {
		return true, false
	}

	refVal := reflect.ValueOf(value)
	kind := refVal.Kind()
	switch kind {
	case reflect.Chan, reflect.Func, reflect.Map, reflect.Pointer, reflect.UnsafePointer, reflect.Interface, reflect.Slice:
		if !refVal.IsNil() {
			return false, false
		}

		if _, ok := value.(driver.Valuer); ok {
			if kind == reflect.Pointer {
				// The type assertion will succeed if driver.Valuer is implemented on T or *T. Check if it is implemented on *T
				// by checking if it is not implemented on *T.
				return true, !refVal.Type().Elem().Implements(valuerReflectType)
			} else {
				return true, true
			}
		}

		return true, false
	default:
		return false, false
	}
}