followed-by: Apply content to adjacent siblings. #sassmeister #mixin

SassMeister-input.scss

// ----
// Sass (v3.4.4)
// Compass (v1.0.1)
// ----

@mixin followed-by($selectors...) {
  $placeholder: "%#{unique_id()}";
  @at-root #{$placeholder} {
    @content;
  }
  @each $selector in $selectors {
    + #{$selector} {
      @extend #{$placeholder};
    }
  }
}


.formatted p {
  @include followed-by(ul, ol) {
    margin-top: 10px;
  }
}

SassMeister-output.css

.formatted p + ul, .formatted p + ol {
  margin-top: 10px;
}