/usr/include/blitz/meta/metaprog.h is in libblitz0-dev 1:0.10-3.2.
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 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 | // -*- C++ -*-
/***************************************************************************
 * blitz/meta/metaprog.h   Useful metaprogram declarations
 *
 * $Id$
 *
 * Copyright (C) 1997-2011 Todd Veldhuizen <tveldhui@acm.org>
 *
 * This file is a part of Blitz.
 *
 * Blitz 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.
 *
 * Blitz 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 Blitz.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * Suggestions:          blitz-devel@lists.sourceforge.net
 * Bugs:                 blitz-support@lists.sourceforge.net    
 *
 * For more information, please see the Blitz++ Home Page:
 *    https://sourceforge.net/projects/blitz/
 *
 ***************************************************************************/
#ifndef BZ_META_METAPROG_H
#define BZ_META_METAPROG_H
BZ_NAMESPACE(blitz)
// Null Operand
class _bz_meta_nullOperand {
public:
    _bz_meta_nullOperand() { }
};
template<typename T> inline T operator+(const T& a, _bz_meta_nullOperand)
{ return a; }
template<typename T> inline T operator*(const T& a, _bz_meta_nullOperand)
{ return a; }
// MetaMax
template<int N1, int N2>
class _bz_meta_max {
public:
    static const int max = (N1 > N2) ? N1 : N2;
};
// MetaMin
template<int N1, int N2>
class _bz_meta_min {
public:
    static const int min = (N1 < N2) ? N1 : N2;
};
BZ_NAMESPACE_END 
#endif // BZ_META_METAPROG_H
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