errorhelpers.nim

import std/sequtils, chronos

proc allFuturesThrowing*(args: varargs[FutureBase]): Future[void] =
  # This proc is only meant for use in tests / not suitable for general use.
  # - Swallowing errors arbitrarily instead of aggregating them is bad design
  # - It raises `CatchableError` instead of the union of the `futs` errors,
  #   inflating the caller's `raises` list unnecessarily. `macro` could fix it
  let futs = @args
  (
    proc() {.async: (raises: [CatchableError]).} =
      await allFutures(futs)
      var firstErr: ref CatchableError
      for fut in futs:
        if fut.failed:
          let err = fut.error()
          if err of CancelledError:
            raise err
          if firstErr == nil:
            firstErr = err
      if firstErr != nil:
        raise firstErr
  )()

proc allFuturesThrowing*[T](futs: varargs[Future[T]]): Future[void] =
  allFuturesThrowing(futs.mapIt(FutureBase(it)))

proc allFuturesThrowing*[T, E]( # https://github.com/nim-lang/Nim/issues/23432
    futs: varargs[InternalRaisesFuture[T, E]]
): Future[void] =
  allFuturesThrowing(futs.mapIt(FutureBase(it)))