Generated by SassMeister.com.

SassMeister-input-HTML.haml

.parent
  .child boo
  .child baz
  .foo
    .child blah
  .child
    bar

SassMeister-input.scss

// ----
// Sass (v3.3.0.rc.1)
// Compass (v0.13.alpha.10)
// ----

// Sibling selector diff

.child {
  ~ .child {
    color: blue;
  }
  + .child {
    color: red;
  }
}

SassMeister-output.css

.child ~ .child {
  color: blue;
}
.child + .child {
  color: red;
}

SassMeister-rendered.html

<div class='parent'>
  <div class='child'>boo</div>
  <div class='child'>baz</div>
  <div class='foo'>
    <div class='child'>blah</div>
  </div>
  <div class='child'>
    bar
  </div>
</div>