ast_external.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. *)

let create_local_external loc 
     ?(pval_attributes=[])
     ~pval_prim
     ~pval_type 
     ?(local_module_name = "J")
     ?(local_fun_name = "unsafe_expr")
     args
  : Parsetree.expression_desc = 
  Pexp_letmodule
    ({txt = local_module_name; loc},
     {pmod_desc =
        Pmod_structure
          [{pstr_desc =
              Pstr_primitive
                {pval_name = {txt = local_fun_name; loc};
                 pval_type ;
                 pval_loc = loc;
                 pval_prim ;
                 pval_attributes };
            pstr_loc = loc;
           }];
      pmod_loc = loc;
      pmod_attributes = []},
     {
       pexp_desc =
         Pexp_apply
           (({pexp_desc = Pexp_ident {txt = Ldot (Lident local_module_name, local_fun_name); 
                                      loc};
              pexp_attributes = [] ;
              pexp_loc = loc} : Parsetree.expression),
            args);
       pexp_attributes = [];
       pexp_loc = loc
     })

let local_extern_cont loc 
     ?(pval_attributes=[])
     ~pval_prim
     ~pval_type 
     ?(local_module_name = "J")
     ?(local_fun_name = "unsafe_expr")
     (cb : Parsetree.expression -> 'a) 
  : Parsetree.expression_desc = 
  Pexp_letmodule
    ({txt = local_module_name; loc},
     {pmod_desc =
        Pmod_structure
          [{pstr_desc =
              Pstr_primitive
                {pval_name = {txt = local_fun_name; loc};
                 pval_type ;
                 pval_loc = loc;
                 pval_prim ;
                 pval_attributes };
            pstr_loc = loc;
           }];
      pmod_loc = loc;
      pmod_attributes = []},
     cb {pexp_desc = Pexp_ident {txt = Ldot (Lident local_module_name, local_fun_name); 
                                 loc};
         pexp_attributes = [] ;
         pexp_loc = loc}
)