Source.AttrSourceval pp :
'a. (Ppx_deriving_runtime.Format.formatter ->
'a ->
Ppx_deriving_runtime.unit) ->
Ppx_deriving_runtime.Format.formatter ->
'a t ->
Ppx_deriving_runtime.unitval show :
'a. (Ppx_deriving_runtime.Format.formatter ->
'a ->
Ppx_deriving_runtime.unit) ->
'a t ->
Ppx_deriving_runtime.string