csp-macros.js

operator (<~) 49
  { $channel } => #{ yield csp.take($channel) }

operator (~>) 50 right
  { $value, $channel } => #{ yield csp.put($channel, $value) }

macro (<~alts) {
  rule { } => {
    yield csp.alts
  }
}

// examples:

var ch = chan();

var x = <~ ch
// var x = yield csp.take(ch)

5 ~> ch
// yield csp.put(ch, 5)

(<~ foo()) ~> ch
// yield csp.put(ch, yield csp.take(foo()))

var r = <~alts([ch1, ch2])
// var r = yield csp.alts([ch1, ch2])

sweetjs?

Yep!