chill-bundles/Resources/assets/bower_components/gumby/sass/functions/_icons.scss

@function match($list, $icon) {
  @each $item in $list {
    $index: index($item, $icon);
      @if $index { 
        $return: if($index == 1, 2, $index);
        @return nth($item, $return); 
      }
    }
  @return false;
}

@mixin i($icon) {
  .#{$icon} {
    &.icon-left a:before, &.icon-right a:after {
      content: "#{match($entypo-icons, $icon)}";
      height: inherit;
    }
  }
  i.#{$icon}:before {
    content: "#{match($entypo-icons, $icon)}";
    height: inherit;
  }
}

@mixin icon($icon) {
  @if (type-of($icon) == list) {
    @each $i in $icon {
      @include i($i);
    }
  } @elseif ($icon == all) {
    @each $icon in $entypo-icons {
      .#{nth($icon, 1)} {
        &.icon-left a:before, &.icon-right a:after {
          content: "#{nth($icon, 2)}";
          height: inherit;
        }
      }
      i.#{nth($icon, 1)}:before {
        content: "#{nth($icon, 2)}";
        height: inherit;
      }
    }
  } @else {
    @include i($icon);
  }
}