User-friendly date/time parsing

[jonas-schievink]

It would be nice if chrono (or another crate, really) offered more ways of parsing date and time strings that come from user input. These strings often don't fully specify a DateTime, so I'd like to use the current date as a sort of "fallback" (imagine that the user wants to set a timer to fire today at 12:30, so they just enter "12:30" and expect it to work).

Currently, chrono just bails when a parsed string doesn't fully specify a DateTime.

[lifthrasiir]

This sounds like a strtotime-esque niche crate! I think it's useful to have but not a scope of the main crate. Probably it's in the scope of the Chronotope organization however.

[beamspease]

I too would like to see this, but I keep jumping around too much to learn nom well enough to do something about it.

[blankname]

Sounds like something that would fit well in the humantime crate (it currently only supports parsing durations).
https://github.com/tailhook/humantime

[0xpr03]

This would be really useful. I've some tasks to start daily from a certain time. Currently I've much boilerplate code which breaks with every chrono release just to parse a user %H:%M which is added to the current date and then checked whether we've to wait for tomorrow or can schedule this already today.