@mixin link---alter() {
}

@mixin link() {
  color: $link-color;
  text-decoration: $link-decoration;
  transition: all 0.4s;
  @include link---alter;
}

@mixin link--hover---alter() {
}

@mixin link--hover() {
  color: $link-hover-color;
  text-decoration: $link-hover-decoration;
  outline: none;
  @include link--hover---alter();
}