ast_derive_util.ml

(* Copyright (C) 2015-2016 Bloomberg Finance L.P.
 * 
 * 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, either version 3 of the License, or
 * (at your option) any later version.
 *
 * In addition to the permissions granted to you by the LGPL, you may combine
 * or link a "work that uses the Library" with a publicly distributed version
 * of this file to produce a combined library or application, then distribute
 * that combined work under the terms of your choosing, with no requirement
 * to comply with the obligations normally placed on you by section 4 of the
 * LGPL version 3 (or the corresponding section of a later version of the LGPL
 * should you choose to use a 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. *)

open Ast_helper

let core_type_of_type_declaration (tdcl : Parsetree.type_declaration) =
  match tdcl with
  | {ptype_name = {txt; loc}; ptype_params; ptype_attributes = attrs} ->
    Typ.constr ~attrs {txt = Lident txt; loc} (Ext_list.map ptype_params fst)

let new_type_of_type_declaration (tdcl : Parsetree.type_declaration) new_name =
  match tdcl with
  | {ptype_name = {loc}; ptype_params} ->
    ( Typ.constr {txt = Lident new_name; loc} (Ext_list.map ptype_params fst),
      {
        Parsetree.ptype_params = tdcl.ptype_params;
        ptype_name = {txt = new_name; loc};
        ptype_kind = Ptype_abstract;
        ptype_attributes = [];
        ptype_loc = tdcl.ptype_loc;
        ptype_cstrs = [];
        ptype_private = Public;
        ptype_manifest = None;
      } )
let not_applicable loc deriving_name =
  Location.prerr_warning loc
    (Warnings.Bs_derive_warning (deriving_name ^ " not applicable to this type"))

let invalid_config (config : Parsetree.expression) =
  Location.raise_errorf ~loc:config.pexp_loc
    "such configuration is not supported"