about
side.effects struct Closed<We: Breathing> { let us: We var oxygen: Oxygen = .tooLittle init(us: We) { self.us = us side.forEach { oxygen += $0(us) } } let side: [(We) -> Oxygen] = [ { $0.turn(ac, to: .recirculation) }, { $0.share(the:oxygen:)(that՚s.left, inside) }, { $0.gnaw(the: air.which(slowly: thickens), as: underpressure.closes(walls:in:)) }] func flatMap<W>(f: (We) -> Closed<W>) -> Closed<W> { effects.forEach { $0(oxygen) } return f(us) } let effects: [(Oxygen) -> Stay] = [ { hope($0.which(was: not(spent)) .will(find(a: way, to: other.lungs))) }, { needing($0, not: to(stay.sane), but: to(stay)) }]} // in Swift, by siejkowski