portability: fix several issues with M4 subprocess.

[bison.git] / src / assoc.c

/* Associativity information.
   Copyright (C) 2002, 2005-2006, 2008-2010 Free Software Foundation,
   Inc.

   This file is part of Bison, the GNU Compiler Compiler.

   This program 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 3 of the License, or
   (at your option) any 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include <config.h>
#include "system.h"

#include "assoc.h"


const char *
assoc_to_string (assoc a)
{
  switch (a)
    {
    default:
      abort ();

    case undef_assoc:
      return "undefined associativity";

    case right_assoc:
      return "%right";

    case left_assoc:
      return "%left";

    case non_assoc:
      return "%nonassoc";

    case precedence_assoc:
      return "%precedence";
    }
}