Generated by SassMeister.com.

SassMeister-input.scss

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

@mixin to-em($properties, $sizes, $context: $font-size, $sledgehammer: false) {

  $values: ();
  $sublists: false;
  $important: if($sledgehammer, "!important", "");

  @each $s in $sizes {

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

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

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

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

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

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

@mixin to-rem($properties, $sizes, $sledgehammer: "") {

  $values: ();
  $sublists: false;

  @each $s in $sizes {

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

      @each $ss in $s {
        $vv: append($vv, if(type-of($ss) == number, #{$ss / $font-size}rem,
          $ss));
      }

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

    @else {
      $values: append($values, if(type-of($s) == number, #{$s / $font-size}rem,
        $s));
    }
  }

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

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

$font-size: 16;

a {
  @include to-em(margin, 16);
  @include to-em(margin, 10, 12, true);
  @include to-rem(padding, 12);
  @include to-rem(padding, 12, true);
  @include to-em(text-shadow, (#0d6e28 1 1) (#777 0 0 2), 20);
  @include to-em(text-shadow, (#0d6e28 1 1) (#777 0 0 2), 20, true);
  @include to-rem(text-shadow, (#0d6e28 1 1) (#777 0 0 2));
  @include to-rem(text-shadow, (#0d6e28 1 1) (#777 0 0 2), true);
}

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

SassMeister-output.css

a {
  margin: 1em;
  margin: 0.83333em!important;
  padding: 0.75rem;
  padding: 0.75remtrue;
  text-shadow: #0d6e28 0.05em 0.05em, #777 0em 0em 0.1em;
  text-shadow: #0d6e28 0.05em 0.05em, #777 0em 0em 0.1em!important;
  text-shadow: #0d6e28 0.0625rem 0.0625rem, #777 0rem 0rem 0.125rem;
  text-shadow: #0d6e28 0.0625rem 0.0625rem, #777 0rem 0rem 0.125remtrue;
}

b {
  margin: 0.75em!important;
  padding: 0.75em!important;
  margin: 16/falseem!important;
  padding: 16/falseem!important;
  margin: 16/""em!important;
  padding: 16/""em!important;
}