1<===> input.scss
2@function returns-string() {
3  @return "selector";
4}
5
6#{"selector"} {
7  color: red;
8}
9
10#{returns-string()} {
11  color: red;
12}
13
14#{"selector"} selector2 {
15  color: red;
16}
17
18#{returns-string()} selector2 {
19  color: red;
20}
21<===> output.css
22selector {
23  color: red;
24}
25
26selector {
27  color: red;
28}
29
30selector selector2 {
31  color: red;
32}
33
34selector selector2 {
35  color: red;
36}
37