Add an automatic invert function

[sun-geo]

Lets say we have a opening/service time of
Mo-Fr 09:00-17:00
and for conditional syntax you want to write the inverted times like:
Mo-Fr 00:00-09:00,17:00-24:00, Sa,Su 00:00-24:00

[ypid]

Hm, I don’t have a clear idea yet how I could program this so that the inverse that would be generated is actually an "optimal" way to express it. So before we talk about extending https://openingh.openstreetmap.de/evaluation_tool/, lets maybe talk about how the syntax can be used in clever yet defined ways to achieve what you want.

My idea:

open; Mo-Fr 09:00-17:00 off
Mo-Fr 09:00-17:00

See https://wiki.openstreetmap.org/wiki/Key:opening_hours/specification#explain:rule_modifier:closed

This makes it really quick to "toggle" inverse and normal. But that is open for discussion. It was just the first thing I came up with right now.

[sun-geo]

My idea:

open; Mo-Fr 09:00-17:00 off
Mo-Fr 09:00-17:00

Interesting, the request was related in usage of date/time values for traffic signs. I never used the open / closed / off syntax in combination with traffic sign tagging. Do you think it would be okay? Or you want to use the syntax just for an internal converting function?

Edit
Oh, i see, your mentioned statement (open; Mo-Fr 09:00-17:00 off) seems already working:
https://openingh.openstreetmap.de/evaluation_tool/?EXP=open%3B%20Mo-Fr%2009%3A00-17%3A00%20off&lat=48.7769&lon=9.1844&mode=0&DATE=1605714780000

[ypid]

Yes, it is already supported (for years already). I guess now that I read it a second time, I don’t see anything wrong with this so I would say you can use it.