Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.0.rc.5)
// Compass (v1.0.0.alpha.18)
// ----

%clearfix {
	&:before,
	&:after {
		content: " ";   // 1
		display: table; // 2
	}
	&:after {
		clear: both;
	}
}
.clearfix {
	@extend %clearfix;
}
.something {
  @extend %clearfix;
  background: red;
}

SassMeister-output.css

.clearfix:before, .something:before, .clearfix:after, .something:after {
  content: " ";
  display: table;
}
.clearfix:after, .something:after {
  clear: both;
}

.something {
  background: red;
}