/**
 * Joins all elements of list with passed glue
 *
 * @link http://sassylists.com/documentation/#to-string
 *
 * @param {List}   $list
 * @param {String} $glue
 * @param {Bool}   $is-nested
 *
 * @return {String}
 */
@function flint-list-to-string($list, $glue: "", $is-nested: false) {
	$result: null;
	$length: length($list);

	@for $i from 1 through $length {
		$n: nth($list, $i);

		@if flint-is-list($n) {
			$result: $result#{flint-list-to-string($n, $glue, true)};
		} @else {
			$result: if($i != length($list) or $is-nested, $result#{$n}#{$glue}, $result#{$n});
		}
	}

	@return $result;
}