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/*************************************************************************
* Copyright (C) 2009 Tavian Barnes <tavianator@gmail.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library 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. *
* *
* The Dimension Library 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 this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
// Template utilities
#ifndef DIMENSIONXX_UTILITY_HPP
#define DIMENSIONXX_UTILITY_HPP
namespace Dimension
{
// A constraint enforcing that T is a POD type by making it part of a union.
// Taking the address of this function will cause a compile-time failure if
// T is not a POD type.
template <typename T>
void POD_constraint();
// POD constraint implementation
template <typename T>
void
POD_constraint()
{
union
{
T t;
} constraint;
static_cast<void>(constraint); // Silence unused variable warning
}
}
#endif // DIMENSIONXX_UTILITY_HPP
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