Variable / property namespacing

The discussion around namespacing had some proposals on syntax, but I'm starting to think https://github.com/less/less.js/issues/2767 makes the proposal problematic. https://github.com/less/less.js/issues/1848

Yes, that was part of the namespacing discussion. However, after some of our discussion around unifying mixins and detached ruleset behavior, I'm not sure the syntax really makes sense.

Namespacing

For example, we were talking about:

val: @{#ns var};
val: ${#ns prop};

...with var and prop a variable and property inside that namespace, and the @ and $ applying to the last identifier. But if we make a detached ruleset a kind of (anonymous mixin assigned to a var), then this logic begins to quickly get confusing.

val: @{@dr var};  // which one does @ belong with?

We also talked about the short form #ns@var, which becomes something like @dr1@dr2@var, which conflicts with other syntax.

So, I'm thinking for 3.0, we re-think it to one of the earlier suggestions by @lukeapage which was close to the original Ruby syntax with [] for properties:

val: #ns[@var];
val: #ns[prop];
val: @dr[@var];
val: @dr[prop];

That places the @ symbol closer to the actual variable, and makes the identifier it belongs with less ambiguous.

Interpolation

... Discussion moved to #13, as it's not necessary to do both at the same time, or at all.

Start by reading the linked discussions in issues 2767 and 1848, then review the namespacing examples and the note moving interpolation discussion to issue 13. Done means agreeing on a viable property and variable namespacing syntax and clarifying its scope for Less 3.0.