Mixin Interpolation

We have selector interpolation, yet mixin interpolation does not work

For example:

.device-type(@namespace:~'') {
    .@{namespace}-test { width:50%; }
}

.device-type(~"laptop-");

Would generate a css class laptop-test, that could be used here:

<div id="test" class="laptop-test"> .... </div>

However, if I add this, things fail:

#test {
    .laptop-test;
}

One would expect it to generate:

.laptop-test {
    width:50%;
}
.testdiv {
    width:50%;
}

[matthew-dean]

+1 to variable use in mixin definition and call

[seven-phases-max]

is still not supported yet?

No. Neither in interpolated nor in simple variable form. (I re-opened #1338).