Interpolated class names cannot be used in :extend syntax

[Craga89]

LESS cannot currently use the :extend syntax to extend styles which are applied using an "interpolated" selector. For example:

@className: test;

.@{className}{
  background-color: red;
}

.otherClass:extend(.test){}

Is this a bug? Or simply a side effect of the class name interpolation?

[Craga89]

Sorry, looks like I've found a discussion of the problem here: https://stackoverflow.com/questions/19602812/less-mixin-a-variable-class-name

[SomMeri]

That issue is tracked here: #1539 . In short, it is an open feature request, but the discussion contains also workaround.