@function __list-reverse($list, $args...) {
    $length: length($list);
    $result-list: ();
    $index: $length;

    @while $index > 0 {
        $result-list: append($result-list, nth($list, $index));
        $index: $index - 1;
    }

    @return $result-list;
}


@function __str-reverse($string, $args...) {
    $string-list: __to-list($string);
    $result: __list-reverse($string-list);

    @return __join($result, '');
}


@function __reverse($value, $args...) {
    @if __is-string($value) {
        @return __str-reverse($value);
    }

    @return __list-reverse($value);
}


/// Reverses a `$list` or `$string`. The first element/character of the list/string
/// becomes the last, and vice versa.
/// 
/// @access public
/// @group List
/// @param {List|String} $value - The value to reverse.
/// @returns {List|String} Returns reversed `$value`.
/// @example scss
/// $foo: _reverse(1 2 3);
/// // => 3 2 1
/// 
/// $foo: _reverse('abc');
/// // => 'cba'

@function _reverse($args...) {
    @return call(get-function('__reverse'), $args...);
}


/// Reverses a `$string`. The first character of the string
/// becomes the last, and vice versa.
/// 
/// @access public
/// @group List
/// @param {String} $string - The string to reverse.
/// @returns {String} Returns reversed `$string`.
/// @example scss
/// $foo: _str-reverse('abc');
/// // => 'cba'

@function _str-reverse($args...) {
    @return call(get-function('__str-reverse'), $args...);
}