BUG: Can't override variables with 'when' statement

[janannedh]

It's not possible to override @variables with a 'when' statement, like this for example :

@a: false;
@b: 1px;

& when (@a = false) {
    @b: 2px;
}

But it is possible it like this:
```less
@a: false;
@b: 1px;

& when (@a = false) {
    #c {
        width: 2px;
    };
}

I tried all kinds of solutions:
http://stackoverflow.com/questions/31378687/less-when-statement-without-classname

Is this a bug?

[seven-phases-max]

_{please use backticks to format you code.}

No, not a bug.

& {...} statement is an ordinal ruleset (just like div {...} for example), and as an ordinal ruleset it should not expose its content (variables and mixins) to an outer scope (see #2072 for more details).
There're other ways to achieve conditional variable definition, but to suggest something specific we need you to provide a bit more specific example of your use-case.

P.S. I see you've already asked a more specific question at http://stackoverflow.com/questions/31378687 and I guess there're already a few answers to fit.

[seven-phases-max]

Closing as expected behaviour (and duplicate of #2072 if it's about to be turned into feature request).