package asli

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in-package search v0.2.0

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type 'a visitAction =

| SkipChildren
(*
Do not visit the children. Return the node as it is.
*)
| DoChildren
(*
Continue with the children of this node. Rebuild the node on return if any of the children changes (use == test)
*)
| ChangeTo of 'a
(*
Replace the expression with the given one
*)
| ChangeDoChildrenPost of 'a * 'a -> 'a
(*
First consider that the entire exp is replaced by the first parameter. Then continue with the children. On return rebuild the node if any of the children has changed and then apply the function on the node
*)

Different visiting actions. 'a will be instantiated with expr, stmt, etc.

val doVisit : 'v -> 'a visitAction -> ('v -> 'a -> 'a) -> 'a -> 'a

val mapNoCopy : ('a -> 'a) -> 'a list -> 'a list

val mapNoCopyList : ('a -> 'a list) -> 'a list -> 'a list

val mapOptionNoCopy : ('a -> 'a) -> 'a option -> 'a option

val doVisitList : 
  'v ->
  'a list visitAction ->
  ('v -> 'a -> 'a) ->
  'a ->
  'a list