Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.0.rc.4)
// Compass (v1.0.0.alpha.18)
// ----

//recursive match function
@function recumatch($l, $a){
  @each $e in $l {
    @if type-of($e) != 'list' {
      @if $e == $a { @return true; }
    }
    @else {
      @if recumatch($e, $a) { @return true; }
    }
  }
  @return false;
}

test {
  //multidimensional list:
  $list: (('a', ('f', 'b')), 'c'), 'd';
  
  test1: recumatch($list, 'b');
  test2: recumatch($list, 'g');
}

SassMeister-output.css

test {
  test1: true;
  test2: false;
}