._, cats.effect.IO
val ioOfList = aLotOfIOs.parSequence<console>:44: error: could not find implicit value for parameter P: cats.Parallel[cats.effect.IO,F]我包括隐式Timer[IO],即implicit val timer = IO.t
scala/is/cir/example/application/Http4sApi.scala:24:68: Cannot find an implicit value for ContextShift[cats.effect.IO]: [error] * if using] <and> (ec: scala.concurrent.Exe
/scala/io/databaker/UserSvcServlet.scala:12:54: Cannot find implicit value for ConcurrentEffect[[+A]cats.effect.IOdepend on having an implicit
[error] s.c.ExecutionContext in scope, a Scheduler, a ContextShift[[+A]cats.effect.IOmain/scala/io/datab