/usr/include/ginac/fail.h is in libginac-dev 1.6.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | /** @file fail.h
 *
 *  Interface to class signaling failure of operation. Considered obsolete
 *  somewhat obsolete (most of this can be replaced by exceptions). */
/*
 *  GiNaC Copyright (C) 1999-2015 Johannes Gutenberg University Mainz, Germany
 *
 *  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 2 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, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef GINAC_FAIL_H
#define GINAC_FAIL_H
#include "basic.h"
#include "archive.h"
namespace GiNaC {
class fail : public basic
{
	GINAC_DECLARE_REGISTERED_CLASS(fail, basic)
	
	// functions overriding virtual functions from base classes
protected:
	unsigned return_type() const { return return_types::noncommutative_composite; };
	// non-virtual functions in this class
protected:
	void do_print(const print_context & c, unsigned level) const;
};
GINAC_DECLARE_UNARCHIVER(fail);
} // namespace GiNaC
#endif // ndef GINAC_FAIL_H
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