Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.9)
// Compass (v1.0.1)
// ----

.button,
%button {
  border-radius: 5px;
  a {
    text-decoration: none;
  }
  &--red {
    @extend %button;
    background: red;
  }
}

.my-red-button {
  @extend %button--red;
}

SassMeister-output.css

.button,
.button--red,
.my-red-button {
  border-radius: 5px;
}
.button a,
.button--red a,
.my-red-button a {
  text-decoration: none;
}
.button--red,
.my-red-button {
  background: red;
}