Generated by SassMeister.com.

SassMeister-input.scss

// ----
// libsass (v3.2.5)
// ----

$font-stack:
  (group: base-font, id: regular, font: ('robotoregular', sans-serif ), weight: normal, style: normal),
  (group: base-font, id: regular-italic, font: ('robotoitalic', sans-serif ), weight: normal, style: italic),
  (group: base-font, id: medium, font: ('robotomedium', sans-serif), weight: normal, style: normal),
  (group: base-font, id: medium-italic, font: ('robotomedium_italic', sans-serif), weight: normal, style: italic),
  (group: base-font, id: bold, font: ('robotobold', sans-serif), weight: normal, style: normal),
  (group: base-font, id: bold-italic, font: ('robotobold', sans-serif), weight: normal, style: italic),
  (group: variant-font, id: regular, font: ('amerika_sansregular', serif), weight: normal, style: normal);
  
// Breakpoint Mixin
@mixin font($group, $id:regular){
  @each $font in $font-stack{
    @if($group == map-get($font, group) and $id == map-get($font, id)){
      font-family: map-get($font, font);
      font-weight: map-get($font, weight);
      font-style: map-get($font, style);
    }
  }
}

h1{
  @include font(base-font, bold);
}

SassMeister-output.css

h1 {
  font-family: "robotobold", sans-serif;
  font-weight: normal;
  font-style: normal;
}