Generated by SassMeister.com.

input.scss

// ----
// Compass (v1.0.1)
// ----

.baz,
.bar {
    @at-root foo#{&} { 
        color: baz;
    }
}

output.css

foo.baz, .bar {
  color: baz;
}

settings.json

{
  "sass": {
    "compiler": "Ruby Sass/3.4.3",
    "extensions": {
      "Compass": "1.0.1"
    },
    "syntax": "SCSS",
    "outputStyle": "expanded"
  },
  "autoprefixer": false
}