Like alts! inside go blocks

clojure.core.async.impl.ioc-macros/async-custom-terminators

impl really means impl

having written a bunch of that code back in the day, I can't in good conscience suggest anyone extend it

the terminator notion is from LLVM, meaning the final instruction in a basic block

I know impl means what it says on the tin. I'm missing something slightly lower level.

The root of the problem is that the limit for takes and puts leaks a lot

So if for example I want to create a pipeline element similar to pipeline-async which does not maintain order I have to take lots of care to not create a situation where I have a bunch of puts/takes on one channel