Rea.Traverse
Data type traversal use cases.
val to_map :
(('b -> (Identity.r as 'R, 'e, 'a, 'D) er) ->
't ->
('R, 'e, 's, ('R, 'D) monad' as 'D) er) ->
('b -> 'a) ->
't ->
's
Convert traversal to map
.
val to_set :
(('b -> (Identity.r as 'R, 'e, 'a, 'D) er) ->
't ->
('R, 'e, 's, ('R, 'D) monad' as 'D) er) ->
'a ->
't ->
's
Convert traversal to set
.
val to_map_constant :
(('b -> ('c Constant.r as 'R, 'e, 'a, 'D) er) -> 't -> ('R, 'e, 's, 'D) er) ->
'D ->
('b -> 'c) ->
't ->
'c
Convert traversal to map with constant.
val to_get :
(('c -> ('c Constant.r as 'R, 'e, 'a, 'D) er) ->
't ->
('R, 'e, 's, ('R, 'D) functr' as 'D) er) ->
't ->
'c
Convert traversal to get
.
val to_get_opt :
(('c -> ('c option Constant.r as 'R, 'e, 'a, 'D) er) ->
't ->
('R, 'e, 's, ('R, 'D) applicative' as 'D) er) ->
't ->
'c option
Convert traversal to get_opt
.
val to_exists :
(('b -> (bool Constant.r as 'R, 'e, 'a, 'D) er) ->
't ->
('R, 'e, 's, ('R, 'D) applicative' as 'D) er) ->
('b -> bool) ->
't ->
bool
Convert traversal to exists
.
val to_find_map :
(('b -> ('c option Constant.r as 'R, 'e, 'a, 'D) er) ->
't ->
('R, 'e, 's, ('R, 'D) applicative' as 'D) er) ->
('b -> 'c option) ->
't ->
'c option
Convert traversal to find_map
.
val to_map_reduce :
(('b -> ('c Constant.r as 'R, 'e, 'a, 'D) er) ->
't ->
('R, 'e, 's, ('R, 'D) applicative' as 'D) er) ->
'c lazy_op'2 ->
'c ->
('b -> 'c) ->
't ->
'c
Convert traversal to map_reduce
.
val to_iter_er :
(('b -> ('c Constant.r as 'R, 'e, 'a, 'D) er) ->
't ->
('R, 'e, 's, ('R, 'D) applicative' as 'D) er) ->
('b -> ('Ru, 'eu, unit, ['Ru, 'Du] monad' as 'Du) er as 'c) ->
't ->
'c
Convert traversal to iter_er
.
val to_exists_er :
(('b -> ('c Constant.r as 'R, 'e, 'a, 'D) er) ->
't ->
('R, 'e, 's, ('R, 'D) applicative' as 'D) er) ->
('b -> ('Ru, 'eu, bool, ['Ru, 'Du] monad' as 'Du) er as 'c) ->
't ->
'c
Convert traversal to exists_er
.
val to_find_map_er :
(('b -> ('c Constant.r as 'R, 'e, 'a, 'D) er) ->
't ->
('R, 'e, 's, ('R, 'D) applicative' as 'D) er) ->
('b -> ('Ru, 'eu, 'x option, ['Ru, 'Du] monad' as 'Du) er as 'c) ->
't ->
'c
Convert traversal to find_map_er
.