Access properties from other selectors

[silentmatt]

Using prop(name), you can reference existing properties. It should be possible to access properties from other selectors too.

Syntax ideas:

.floated-left {
    float: left;
    width: 100px;
}

.something-else {
    margin-left: prop({.floated-left}.width);
    margin-left: prop(.floated-left, width);
}

The first syntax opens the possibility of using {selector} as a generic "pseudo class". For example, you could do this:

.floated-left-bordered {
    apply: {.floated-left};  // Copy declarations from any rule with .floated-left as a selector
    apply: centered<100px>;
}