| 1 | // Boost.Units - A C++ library for zero-overhead dimensional analysis and |
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| 2 | // unit/quantity manipulation and conversion |
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| 3 | // |
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| 4 | // Copyright (C) 2003-2008 Matthias Christian Schabel |
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| 5 | // Copyright (C) 2008 Steven Watanabe |
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| 6 | // |
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| 7 | // Distributed under the Boost Software License, Version 1.0. (See |
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| 8 | // accompanying file LICENSE_1_0.txt or copy at |
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| 9 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 10 | |
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| 11 | #ifndef BOOST_UNITS_IS_QUANTITY_HPP |
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| 12 | #define BOOST_UNITS_IS_QUANTITY_HPP |
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| 13 | |
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| 14 | /// |
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| 15 | /// \file |
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| 16 | /// \brief Check that a type is a quantity. |
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| 17 | /// |
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| 18 | |
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| 19 | #include <boost/mpl/bool.hpp> |
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| 20 | #include <boost/units/units_fwd.hpp> |
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| 21 | |
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| 22 | namespace boost { |
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| 23 | |
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| 24 | namespace units { |
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| 25 | |
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| 26 | /// Check that a type is a quantity. |
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| 27 | template<typename T> |
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| 28 | struct is_quantity : |
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| 29 | public mpl::false_ |
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| 30 | { }; |
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| 31 | |
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| 32 | template<class Unit, |
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| 33 | class Y> |
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| 34 | struct is_quantity< quantity<Unit,Y> > : |
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| 35 | public mpl::true_ |
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| 36 | { }; |
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| 37 | |
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| 38 | } // namespace units |
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| 39 | |
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| 40 | } // namespace boost |
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| 41 | |
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| 42 | #endif // BOOST_UNITS_IS_QUANTITY_HPP |
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| 43 | |
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