Feature request: when region is active, show word/line/char count in region

[duetosymmetry]

The strings %rw, %rl, and %rc could insert (i) an emptry string if no region is active, or (ii) the word/line/char count in the active region

[sten0]

wc (aliased wc-count) can operate on region. Do you mean using the modeline for a region-local value rather than a buffer-local one?

[duetosymmetry]

Yes, it would be great to use the modeline to see the currently active region's words/lines/chars.