Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.10)
// Compass (v1.0.0.alpha.20)
// Base.Sass (v1.3.3)
// ----

@import "compass";
@import "base.sass/*";


$anonymous-placeholders: ();

@mixin placeholder-wrapper($name, $args...) {
  $times: map-get($anonymous-placeholders, ($name, $args)) or 0;
  $anonymous-placeholders: map-merge($anonymous-placeholders, (($name, $args): $times + 1)) !global;
  $index: index($anonymous-placeholders, (($name, $args) ($times + 1)));

  @if $times == 0 {
    @at-root %-#{$name}-#{$index} {
      @content;
    }
  }

  @extend %-#{$name}-#{$index};
}

@mixin test($a, $b) {
  @include placeholder-wrapper(test, $a, $b) {
    a: $a;
    b: $b;
  }
}

.foo {
  @include test(1, 1);
}

.bar {
  @include test(1, 2);
}

.baz {
  @include test(1, 1);
}

SassMeister-output.css

.foo, .baz {
  a: 1;
  b: 1;
}

.bar {
  a: 1;
  b: 2;
}