A shorthand @font-face mixin

mixins.less

.font(@family, @url, @weight: normal, @style: normal) {
  @font-face {
    font-family: @family;
    src: url('@{url}.eot'); // IE9 Compat Modes
    src: url('@{url}.eot?#iefix') format('embedded-opentype'), // IE6-IE8
         url('@{url}.woff') format('woff'), // Modern Browsers
         url('@{url}.ttf') format('truetype'); // Safari, Android, iOS
         // url('@{url}.svg') format('svg'); // Legacy iOS, pre-4.2, unecessary if not supporting that far.
    font-weight: @weight;
    font-style: @style;
  }
}