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package records
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Class type

Type converters

type 'a t

How to convert a type to and from JSON.

val name : 'a t -> string
val of_yojson : 'a t -> Yojson.Safe.json -> ('a, string) Result.result
val to_yojson : 'a t -> 'a -> Yojson.Safe.json
val make : name:string -> to_yojson:('a -> Yojson.Safe.json) -> of_yojson:(Yojson.Safe.json -> ('a, string) Result.result) -> unit -> 'a t

Declare a new type.

val make_string : name:string -> to_string:('a -> string) -> of_string:(string -> ('a, string) Result.result) -> unit -> 'a t

Declare a new type that marshal/unmarshal to strings.

val exn : exn t

How to represent exceptions.

exception UnserializedException of string

Raised by exn.of_json

val unit : unit t

How to represent unit.

val string : string t

How to represent string.

val int : int t

How to represent int.

val int32 : int32 t

How to represent int32.

val int64 : int64 t

How to represent int64.

val list : 'a t -> 'a list t

Build a representation of a list.

  • deprecated Please use ppx_deriving_yojson instead
val product_2 : string -> 'a t -> string -> 'b t -> ('a * 'b) t

Build a representation of a couple. The labels identify the elements, not their types.

  • deprecated Please use ppx_deriving_yojson instead
val result : 'a t -> 'b t -> ('a, 'b) Result.result t

Build a representation of a result.

val view : name:string -> read:('a -> ('b, string) Result.result) -> write:('b -> 'a) -> 'a t -> 'b t

Build a 'b type which has the same JSON encoding as the 'a type from conversion functions read and write.