(* standard parse error function.
   Copyright (C) 2004 Jean Goubault-Larrecq and LSV, CNRS UMR 8643 & ENS Cachan.

   This file is part of ispi.

   ispi is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   ispi 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with ispi; see the file COPYING.  If not, write to
   the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*)

open "yyerror_h";

fun print_yyloc (f as |[put, ...]|) yyloc =
    (print f (pack (isub (yyloc, 0)+1));
     put "("; print f (pack (isub (yyloc, 1))); put ")";
     put "-";
     print f (pack (isub (yyloc, 2)+1));
     put "("; print f (pack (isub (yyloc, 3))); put ")");

fun yyerror yyloc tokens =
    (#put stderr "Parse error, line ";
     print_yyloc stderr yyloc;
     let val sep = ref ", expected: "
     in
        iterate
          (#put stderr (!sep);
           sep := " or ";
           #put stderr token)
        | token in list tokens
        end;
        #put stderr ".\n";
        #flush stderr ()
     end);