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(* Js_of_ocaml
* http://www.ocsigen.org
* Copyright Hugo Heuzard 2014.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, with linking exception;
* either version 2.1 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*)
(** Deriving_json syntax extension (based on the {i deriving} library).
@see <https://github.com/ocsigen/deriving> the source code of {i deriving}
@see <http://code.google.com/p/deriving/> the documentation of the original {i deriving} library by Jeremy Yallop.
*)
(**
[type typ = .. deriving (Json)] with generate
{[module Json_typ : sig
type a = typ
val to_string : a -> string
val from_string : string -> a
...
end]}
*)
open Pa_deriving_common
open Defs
val register_predefs : Type.qname -> Type.qname -> unit
(** [register_predefs typeA typeB] tells the syntax extension
that [typeB] is an alias for [typeA].
The extension syntax will then use the deriving_json implementation
of [typeB] in place of [typeA]'s one.
Important note: TypeB does NOT HAVE TO actually exists.
In practive, you may need to use this in the following cases:
- use deriving_json on types from external libraries that do not use deriving
- use deriving_json on abstract types
*)
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