package bap-std

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in-package search v0.2.0

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Interacting between monads and language exceptions

val expect : 
  ?finally:(unit -> (unit, 's) t) ->
  f:(unit -> ('a, 's) t) ->
  catch:(exn -> ('a, 's) t) ->
  ('a, 's) t

expect ?finally ~f ~catch evaluates f (), if an exception e is raised during the evaluation (or call) then the result of whole computation will be catch e. If an optional argument ?finally is passed the finally is called after f () computation or after catch e if an exception was raised.