How to pass a property name as an argument to a mixin in less

Question

I want to make a function/mixin that will make a color darker if it is already dark but lighter when it is light (normalize/extremeize?)

Is it possible to do this by

Answer 1

This feature was added since v1.6.0:

@property: color;

.widget {
  @{property}: #0ee;
  background-@{property}: #999;
}

Compiles to:

.widget {
  color: #0ee;
  background-color: #999;
}

See http://lesscss.org/features/#variables-feature-properties