@def myConstant 15px;
@def my_constant 20px;
@def my-constant 25px;

@url myUrl imageName;
@url my_url imageName2;
@url my-url imageName3;

@eval myEval com.foo.bar.foo();
@eval my_eval com.foo.bar.foo();
@eval my-eval com.foo.bar.foo();

.foo {
  width: myConstant;
  height: my-constant;
  top: my_constant;
  left: myEval;

  cursor: myUrl;
}

.bar {
  width: myConstant;
  height: my-constant;
  top: my_constant;
  left: my_eval;

  cursor: my_url;
}

.blop {
  width: myConstant;
  height: my-constant;
  top: my_constant;
  left: my-eval;

  cursor: my-url;
}