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def prepend

bendvy-ecs-core@0.1.0.4 · compose.bend:194

import bendvy-ecs-core@0.1.0.4/compose.bend as Compose
import Base
import world.bend as W
import transaction.bend as T

194# Row outputs are committed only when the entire traversal succeeds.
195def prepend(~S: Data,~Store: Type,~R: Type,~E: Data,~U: Data,~Out: Data,value: Out,observed: T.Tx<W.World<S,Store,R,E>,E> & (T.Outcome<Error<U>> & List<&2,Out>)) -> T.Tx<W.World<S,Store,R,E>,E> & (T.Outcome<Error<U>> & List<&2,Out>):
196  (tx,result) = observed
197  (outcome,values) = result
198  (tx,(outcome,value <> values))

Uses (7)

Used by (1)