Why doesn't this code compile with less?

Question

Less

I use less-loader, for some reason this construction:

.transition(@rest...){
    each(@rest, {
        transition: @{value} 0.5s ease;
    });
}

It does not compile, although in the original documentation the code is almost the same, only not with the rest variable. But as I understand @rest stores a regular array of data. As I understand @{value} does not compile. Is it possible to do what I thought?
In the docs, the code is:

@selectors: blue, green, red;

each(@selectors, {
  .sel-@{value} {
    a: b;
  }
});

И он компилируется

Answer 1

It is necessary to remove the interpolation of the value variable .

.transition(@rest...){
    each(@rest, {
        transition: @value 0.5s ease;
    });
}