Step 27

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Most recent rule applied

EXACT

Stack and Code

StackExpression
case * {(# new_s, result #) -> $0_? new_s}
upd * main
case $3_? realWorld of {
   (# new_s, result #) -> $4_? new_s
}

Heap

VariableObject
$0
PAP(thenIO $1 $0)
$1
PAP(thenIO $3 $4)
$3
THUNK(return_1 monadIO unit)
$4
THUNK(poll_1 monadIO)
main
BLACKHOLE
monadIO
CON(Monad returnIO thenIO)
poll
FUN(monad ->
       let {
          ret_thunk = THUNK(return_1 monad unit);
          poll_poll_thunk = THUNK(poll_1 monad)
       } in then_1 monad ret_thunk poll_poll_thunk)
realWorld
CON(RealWorld)
return
FUN(monad ->
       case monad of {
          Monad return then -> return
       })
returnIO
FUN(x s -> (# s, x #))
then
FUN(monad ->
       case monad of {
          Monad return then -> then
       })
thenIO
FUN(m k s ->
       case m_? s of {
          (# new_s, result #) -> k_? new_s
       })
unit
CON(Unit)