/* Calculate which nonterminals can expand into the null string for Bison.
- Copyright (C) 1984, 1989, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
- 2009 Free Software Foundation, Inc.
+ Copyright (C) 1984, 1989, 2000-2006, 2009-2012 Free Software
+ Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.