Cannot use an interpolated selector as a mixin.

[donaldpipowitch]

I want to use an interpolated selector as a mixin:

@prefix: test;

.@{prefix}-hello {
  color: red;
}

.world {
  .@{prefix}-hello;
}

I would expect this outcome:

.test-hello {
  color: red;
}
.world {
  color: red;
}

But I get this error:

>> ParseError: Unrecognised input in src/scaffolding.less on line 20, column 3:
>> 19 .world {
>> 20   .@{prefix}-hello;
>> 21 }

[SomMeri]

I think it is a duplicate of this one #1399 . Feel free to join the discussion or add +1 there.

Overview: it is an open feature request. It is hard to define how exactly should this feature work. We are collecting various border cases and possible solutions so we can properly define how exactly it should behave. It would be great if you could help us to define this feature.

[donaldpipowitch]

Thank you for your advice @SomMeri.