Acc

Accumulator effect: emit/emitAll/collect for incremental list building.

collect

Read the current accumulated items.

collect : Computation [a]

emit

Append a single item to the accumulator.

emit : a -> Computation null

emitAll

Append a list of items to the accumulator.

emitAll : [a] -> Computation null

handler

Standard accumulator handler. State is a list of accumulated items. Initial state: []

handle { handlers = acc.handler; state = []; } comp