Generated by SassMeister.com.

SassMeister-input.scss

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

$foo: ".foo";

#{$foo} {
  color: red;
}

@at-root {
  $bar: ".bar";
  
  #{$foo} {
    color: black;
  }
  
  #{$bar} {
    color: white;
  }
}

// Undefined variable
//#{$bar} {
//  color: blue;
//}

$hoge: ".hoge";

#{$hoge} {
  $fuga: ".fuga";
  color: green;
  
  #{$fuga} {
    color: yellow;
  }
  
  @at-root {
    $piyo: ".piyo";
    
    #{$piyo} {
      color: gray;
      
      #{$hoge},
      #{$fuga} {
        color: inherit;
      }
    }
  }
}

// Undefined variable
//#{$fuga} {
//  color: purple;
//}

// Undefined variable
//#{$piyo} {
//  color: transparent;
//}

SassMeister-output.css

.foo {
  color: red;
}

.foo {
  color: black;
}

.bar {
  color: white;
}
.hoge {
  color: green;
}
.hoge .fuga {
  color: yellow;
}
.piyo {
  color: gray;
}
.piyo .hoge,
.piyo .fuga {
  color: inherit;
}