Ppx_deriving_gt (GT.Ppx.Ppx_deriving

module E : sig ... end

val gt_param : string -> Parsetree.expression option Ppxlib.Deriving.Args.param

val r : 
  (Parsetree.expression,
    (Astlib.Longident.t * Parsetree.expression) list ->
    (Astlib.Longident.t * Parsetree.expression) list option,
    (Astlib.Longident.t * Parsetree.expression) list option)
    Ppxlib__.Ast_pattern0.t

module H : sig ... end

val str_type_decl : 
  (Ppx.PpxHelpers.Str.t GTCommon.HelpersBase.List.t,
    Ppxlib.rec_flag * Ppxlib.type_declaration list)
    Ppxlib.Deriving.Generator.t

val sig_type_decl : 
  (Ppx.PpxHelpers.Sig.t GTCommon.HelpersBase.List.t,
    Ppxlib.rec_flag * Ppxlib.type_declaration list)
    Ppxlib.Deriving.Generator.t