Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.5)
// Compass (v1.0.1)
// ----

@function get($key, $map: null) {
  @if $map == null {
    $map: $default-settings;
  }

  $break: false;
  @while (str-index($key, ".") or 0) > 0 and $break == false {
    
    $child-key: str-slice($key, 1, str-index($key, ".") - 1);
    $key: str-slice($key, str-index($key, ".") + 1);
    
    @if type-of(map-get($map, $child-key)) == map {
      $map: map-get($map, $child-key);
    } @else {
      $break: true;
    }
  }

  @return if(type-of($map) == map, map-get($map, $key), $map);
}

$default-settings: (
  fonts: (
    primary: (
      size: 1.2em,
      color: blue,
      family: "Helvetica",
    ),
    secondary: (
      size: 1em,
      color: green,
      family: sans-serif,
    )
  )
);

.primary-font {
  font-family: get("fonts.primary.family");
  font-size: get("fonts.primary.size");
  color: get("fonts.primary.color");
}

SassMeister-output.css

.primary-font {
  font-family: "Helvetica";
  font-size: 1.2em;
  color: blue;
}