[mediaqueries-4][mediaqueries-5] Is the <mf-range> "swapping value and name" syntax really useful? #2791

The <mf-range> syntax allows:

<mf-range> = <mf-name> [ '<' | '>' ]? '='? <mf-value>
           | <mf-value> [ '<' | '>' ]? '='? <mf-name>

That is, both 500px > width and width > 500px is valid.

This is nice, but given <mf-value> can also be an <ident> it causes ambiguity, and complexity / slowness while parsing.

Given you can easily use negations, I think it's not terribly useful, but if people feel very strongly about it the spec should define how to resolve the syntax ambiguity.