Generated by SassMeister.com.

SassMeister-input-HTML.html

<div></div>

SassMeister-input.scss

// ----
// Sass (v3.3.9)
// Compass (v1.0.0.alpha.20)
// ----

@mixin context($target, $new-context, $selector: null) {
  $selector: & !default;
  $new-selector: selector-replace($selector, $target, $new-context);
  @at-root #{$new-selector} {
    @content;
  }
}


div {
  nav {
    a {
      color: red;
      @include context('nav', 'nav.open') {
        color: blue;
      }
    }
  }
}

SassMeister-output.css

Invalid CSS after "  $selector: ": expected expression (e.g. 1px, bold), was "& !default;"

SassMeister-rendered.html

<div></div>