// ----
// Sass (v3.4.12)
// Compass (v1.0.3)
// ----

@mixin to-em-or-rem($unit, $properties, $sizes, $context, $sledgehammer) {

  $values: ();
  $sublists: false;
  $unit: if($unit == "em", unquote("em"), unquote("rem"));
  $important: if($sledgehammer, " !important", "");

  @each $s in $sizes {

    @if type-of($s) == list {
      $sublists: true;
      $vv: ();

      @each $ss in $s {
        $vv: append($vv, if(type-of($ss) == number and $ss != 0, #{$ss / $context}#{$unit}, $ss));
      }

      $values: append($values, join((), $vv));
    }

    @else {
      $values: append($values, if(type-of($s) == number and $s != 0, #{$s / $context}#{$unit},
        $s));
    }
  }

  $value: join((), $values, if($sublists, comma, space));

  @each $prop in $properties {
    #{$prop}: $value#{$important};
  }
}

@mixin to-em($properties, $sizes, $context: false, $sledgehammer: false) {
  $context: if($context, $context, $font-size);
  @include to-em-or-rem("em", $properties, $sizes, $context, $sledgehammer);
}

@mixin to-rem($properties, $sizes, $sledgehammer: false) {
  @include to-em-or-rem("rem", $properties, $sizes, $font-size, $sledgehammer);
}

$font-size: 16;

a {
  @include to-em(margin padding, 16, 12, true);
  @include to-em(margin padding, 16, true);
}