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open Base
[%%template
[@@@mode.default m = (local, global)]
module%template.portable Make_base_diff (M : sig
type t [@@deriving equal [@mode.explicit m]]
end) =
struct
let[@inline] get ~from ~to_ = exclave_
if phys_equal from to_ || M.equal from to_
then Optional_diff.get_none ()
else Optional_diff.return to_
;;
let[@inline] apply_exn _ t = t
let[@inline] of_list_exn = function
| [] -> exclave_ Optional_diff.get_none ()
| _ :: _ as l -> exclave_ Optional_diff.return (List.last_exn l)
;;
end
module%template.portable
[@modality p] Make_diff_plain (M : sig
type t [@@deriving equal [@mode.explicit m]]
end) =
struct
type derived_on = M.t
type t = M.t [@@deriving equal [@mode.explicit m]]
include Make_base_diff [@mode m] [@modality p] (M)
end
module%template.portable
[@modality p] Make_diff (M : sig
type t [@@deriving sexp, bin_io, (equal [@mode.explicit m])]
end) =
struct
type derived_on = M.t
type t = M.t [@@deriving sexp, bin_io, (equal [@mode.explicit m])]
include Make_base_diff [@mode m] [@modality p] (M)
end
module%template.portable
[@modality p] Make_plain (M : sig
type t [@@deriving equal [@mode.explicit m]]
end) =
struct
module Diff = Make_diff_plain [@mode m] [@modality p] (M)
end
module%template.portable
[@modality p] Make (M : sig
type t [@@deriving (equal [@mode.explicit m]), sexp, bin_io]
end) =
struct
module Diff = Make_diff [@mode m] [@modality p] (M)
end]