Concurrency.select: def of bend-kit-concurrency@0.2.0.0
Import: import bend-kit-concurrency@0.2.0.0/concurrency.bend as Concurrency
Lines 313-322 of bend-kit-concurrency@0.2.0.0/concurrency.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-concurrency@0.2.0.0/concurrency.bend&start_line=313&end_line=322

import Base

# One channel that carries (i, value) for each value received on chans[i], in
# the order they arrive. Chan.recv on it waits for whichever source is ready
# first, and answers None once every source is closed. The selector owns the
# receiving side of its sources. Close it to stop early: each relay then drops
# the one value it holds, if any, and stops.
def select(-A: Type, chans: List<Chan(A)>) -> IO(Chan(U32 & A)):
  do IO<Chan(U32 & A)>:
    out : Chan(U32 & A) <- Chan.new(U32 & A, 0)
    done : Chan(Unit) <- Chan.new(Unit, 0)
    select.go(A, chans, out, done)

Uses (9):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Chan
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Chan.new
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=IO.bind
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Unit
  https://jend.leeeet.dev/definition.txt?path=bend-kit-concurrency@0.2.0.0/concurrency.bend&name=select.go