Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.7)
// Compass (v1.0.0.alpha.18)
// ----

.icon {
	font-family:"icons";
	display:inline-block;
	vertical-align:middle;
	line-height:1;
	font-weight:normal;
	font-style:normal;
	speak:none;
	text-decoration:inherit;
	text-transform:none;
	text-rendering:optimizeLegibility;
	-webkit-font-smoothing:antialiased;
	-moz-osx-font-smoothing:grayscale;
}

.icon-activity-beach:before {
	content:"\e001";
}

.icon-activity-city:before {
	content:"\e002";
}

.icon-activity-family:before {
	content:"\e003";
}

// Our code

$icons: ("activity-beach", "activity-city", "activity-family");
@each $icon in $icons {
  %icon-#{$icon} {
    &:before {
      @extend .icon;
      @extend .icon-#{$icon};
    }
  }
}

.test {
  @extend %icon-activity-beach;
}

SassMeister-output.css

.icon, .test:before {
  font-family: "icons";
  display: inline-block;
  vertical-align: middle;
  line-height: 1;
  font-weight: normal;
  font-style: normal;
  speak: none;
  text-decoration: inherit;
  text-transform: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.icon-activity-beach:before, .test:before {
  content: "\e001";
}

.icon-activity-city:before {
  content: "\e002";
}

.icon-activity-family:before {
  content: "\e003";
}