When you're deep into trying some weird stuff and rustc suggests `for<'a> T: Fn(&'a U) -> G`pic.twitter.com/6tAPomY1bC
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I've seen this before, but still don't quite have the hang of the `for<'a>` syntax. I know it's usually something about closures, but don't get it yet. Do you know what's up?
Ohh, gonna read up on that. Thank you!
for<'a> introduces a new, unbound lifetime – it means "any lifetime". It's useful for closures because the lifetimes of their arguments usually don't need to be bound to the lifetime of the closure itself.
Thank you!
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