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Diffstat (limited to 'libdimensionxx/dimensionxx/utility.hpp')
| -rw-r--r-- | libdimensionxx/dimensionxx/utility.hpp | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/libdimensionxx/dimensionxx/utility.hpp b/libdimensionxx/dimensionxx/utility.hpp new file mode 100644 index 0000000..50c5e67 --- /dev/null +++ b/libdimensionxx/dimensionxx/utility.hpp @@ -0,0 +1,47 @@ +/************************************************************************* + * 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 |