Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.0.rc.1)
// Compass (v1.0.0.alpha.20)
// ----

$border-radius-base: 6px;
$border-radius-mini: 4px;

$radii: (
  base: $border-radius-base,
  mini: $border-radius-mini
);

@each $radius, $i in $radii {
  %border-radius-#{$radius} {
    border-radius: $i;
  }
}

// This would normally be a silent class using %
.btn {
  @extend %border-radius-base;
}

// This would normally be a silent class using %
.btn-mini {
  @extend %border-radius-mini;
}

SassMeister-output.css

.btn {
  border-radius: 6px;
}

.btn-mini {
  border-radius: 4px;
}