/// Since the current way to qualify a class from within its ruleset is quite
/// ugly, here is a mixin providing a friendly API to do so.
/// @author Hugo Giraudel
/// @param {String} $element-selector - Element selector
qualify($element-selector)
  {$element-selector}&
    {block}


/// @alias qualify
when-is($element-selector)
  +qualify($element-selector)
    {block}


// .button {
//   border: none;
//
//   // Qualify `.button` with `button`
//   @include qualify(button) {
//     -webkit-appearance: none;
//   }
//
//   // Qualify `.button` with `a`
//   @include when-is(a) {
//     text-decoration: none;
//   }
// }