$icons: (edit upload);

.icon {
  display: inline;
  width: 1em;
  height: 1em;
  font-size: 18px;
  line-height: 1;
  vertical-align: top;

  @each $icon in $icons {
    &.#{$icon} {
      background: url(./#{$icon}.png) center / contain no-repeat;
    }
  }
}