I've been playing with core.async, and have come across a couple of things that 
it seemed would probably be common use cases, but can't find anything in the 
library that addresses them.

I'd be grateful for pointers if any of these do exist and I'm just missing 
them, or suggestions for reasons why I don't really want them and should be 
tackling the problem in a different way:

A way to convert a channel to a lazy sequence (i.e. build the sequence by 
repeatedly reading from a channel until it's closed). It seems odd that 
core.async provides a means to turn a lazy sequence into a channel (to-chan) 
but not the inverse?
An equivalent of doseq for a channel, which repeatedly reads from the channel 
and calls its body with the result of doing so, terminating when the channel is 
closed.

Of course, both of these are easy enough to write, but I'm wondering whether 
the fact that they aren't provided as standard is telling me something?

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