Sass multi selector inheritance mixin

multi-inherit.scss

/// Dependency - str-replace mixin from https://css-tricks.com/snippets/sass/str-replace-function/
/// Replace `$search` with `$replace` in `$string`
/// @author Hugo Giraudel
/// @param {String} $string - Initial string
/// @param {String} $search - Substring to replace
/// @param {String} $replace ('') - New value
/// @return {String} - Updated string
@function str-replace($string, $search, $replace: '') {
  $index: str-index($string, $search);

  @if $index {
    @return str-slice($string, 1, $index - 1) + $replace + str-replace(str-slice($string, $index + str-length($search)), $search, $replace);
  }

  @return $string;
}

@mixin multi-inherit($this, $mask) {
  $selector: ();
  @each $amp in $this {
    $selector: append($selector, unquote(str-replace($mask, '&', $amp)), comma);
  }
  @at-root {
   #{$selector} {
   @content;
   }
  }
}

// Example that gives:
// - .p1-opened .p1, .p2-opened .p2, .p3-opened .p3 {  display: block; }
// instead of:
// .p1-opened .p1, .p2-opened .p1, .p1-opened .p2, .p2-opened .p2 { display: block; }
// playground: https://www.sassmeister.com/
.p1, .p2 {
  width: 100%;
  @include multi-inherit(&, '&-opened &') {
    display: block;
  }
  
  &-closed & {
    display: none;
  }
}