/**
 * Transform a dash notation value into a map
 * Dash notation value is : -key1 value1 -key2 value2
 *
 * @param 			{List} 			$dash 			The dash list notation to transform
 * @return 			{Map} 							The map generated
 *
 * @example
 * $dash : -hello world -coco universe
 * s-dash-to-map($dash);
 * // (
 * // 	hello : world,
 * // 	coco : universe
 * // )
 *
 * @author 			Olivier Bossel <olivier.bossel@gmail.com> (https://olivierbossel.com)
 */
@function s-dash-to-map($dash) {
  $prop: null;
  $values: ();
  $map: ();
  // protect
  @if type-of($dash) != list or str-slice(nth($dash, 1), 1, 1) != "-" {
    @return $dash;
  }
  // loop on each properties
  @each $d in $dash {
    @if type-of($d) == string and str-slice($d, 1, 1) == "-" {
      // check if a prop exist and if values exists
      @if $prop and length($values) > 0 {
        @if length($values) == 1 {
          $values: nth($values, 1);
        }
        $map: map-set($map, $prop, $values);
        $values: ();
      }
      // set new prop
      $prop: str-slice($d, 2);
      // check if
    } @else {
      // append values
      $values: append($values, $d);
    }
  }
  // check if a prop exist and if values exists
  @if $prop and length($values) > 0 {
    @if length($values) == 1 {
      $values: nth($values, 1);
    }
    $map: map-set($map, $prop, $values);
  }
  // return the map
  @return $map;
}