hg_lib.open
Open_hg_lib.Or_simple_error
ppxlib
yojson
type 'a t = 'a Core.Or_error.t
val tag : 'a Core.Or_error.t -> string -> 'b -> ('b -> Sexplib0.Sexp.t) -> 'a Core.Or_error.t
val simple_error : 'a -> 'a