@function __base-slice($list, $start: 0, $end: length($list)) {
  $index: 1;
  $length: length($list);
  $start: __parse-int($start);
  $start: if(__is-number($start), floor($start), if(__is-truthy($start), 1, 0));

  @if ($start < 0) {
    $start: if(-$start > $length, 0, ($length + $start));
  }

  $end: if(__is-number($end), floor($end), if(__is-truthy($end), 1, 0));
  $end: if($end > $length, $length, if($end, $end, 0));

  @if ($end < 0) {
    $end: $end + $length;
  }

  $length: if($start > $end, 0, ($end - $start));
  $result: ();

  @while ($index <= $length) {
    $result: append($result, nth($list, ($index + $start)));
    $index: $index + 1;
  }

  @return $result;
}

@function __slice($list, $start: 0, $end: length($list)) {
  $length: if(__is-list-like($list), length($list), 0);

  @if __is-falsey($length) {
    @return ();
  }

  @if (
    $end and not __is-number($end) and __is-iteratee-call($list, $start, $end)
  ) {
    $start: 0;
    $end: $length;
  }

  @return __base-slice($list, $start, $end);
}

/// Creates a slice of `$list` from `$start` up to, but not including, `$end`.
///
///
/// @access public
/// @group List
/// @param {List} $list - The list to slice.
/// @param {number} $start [0] - The start position.
/// @param {number} $end [length($list)] - The end position.
/// @returns {List} Returns the slice of `$list`.
/// @example scss
/// // todo

@function _slice($args...) {
  @return call(get-function("__slice"), $args...);
}