MlbendDatasets.opened: def of mlbend-datasets@0.1.6.0
Import: import mlbend-datasets@0.1.6.0/main.bend as MlbendDatasets
Lines 245-253 of mlbend-datasets@0.1.6.0/main.bend: https://jend.leeeet.dev/read.txt?path=mlbend-datasets@0.1.6.0/main.bend&start_line=245&end_line=253

import Base

def opened(r: Result<&1, &1, U32 & String, File>) -> IO(Maybe<&1, String>):
  match r:
    case Fail{e}:
      IO.pure(Maybe<&1, String>, None{})
    case Done{file}:
      do IO<Maybe<&1, String>>:
        pair : File & Result<&1, &1, U32 & String, U32> <- File.size(file)
        m : Maybe<&1, String> <- sized_done(pair)
        return m

Uses (11):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=File
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=File.size
  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=IO.pure
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=mlbend-datasets@0.1.6.0/main.bend&name=sized_done