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117 lines
2.1 KiB
117 lines
2.1 KiB
// Boost.Units - A C++ library for zero-overhead dimensional analysis and |
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// unit/quantity manipulation and conversion |
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// |
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// Copyright (C) 2003-2008 Matthias Christian Schabel |
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// Copyright (C) 2008 Steven Watanabe |
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// |
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// Distributed under the Boost Software License, Version 1.0. (See |
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// accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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#ifndef BOOST_UNITS_DETAIL_ONE_HPP |
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#define BOOST_UNITS_DETAIL_ONE_HPP |
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#include <boost/units/operators.hpp> |
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namespace boost { |
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namespace units { |
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struct one { BOOST_CONSTEXPR one() {} }; |
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// workaround for pathscale. |
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inline BOOST_CONSTEXPR one make_one() { |
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return(one()); |
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} |
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template<class T> |
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struct multiply_typeof_helper<one, T> |
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{ |
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typedef T type; |
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}; |
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template<class T> |
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struct multiply_typeof_helper<T, one> |
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{ |
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typedef T type; |
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}; |
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template<> |
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struct multiply_typeof_helper<one, one> |
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{ |
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typedef one type; |
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}; |
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template<class T> |
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inline BOOST_CONSTEXPR T operator*(const one&, const T& t) |
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{ |
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return(t); |
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} |
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template<class T> |
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inline BOOST_CONSTEXPR T operator*(const T& t, const one&) |
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{ |
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return(t); |
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} |
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inline BOOST_CONSTEXPR one operator*(const one&, const one&) |
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{ |
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return(one()); |
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} |
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template<class T> |
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struct divide_typeof_helper<T, one> |
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{ |
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typedef T type; |
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}; |
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template<class T> |
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struct divide_typeof_helper<one, T> |
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{ |
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typedef T type; |
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}; |
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template<> |
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struct divide_typeof_helper<one, one> |
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{ |
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typedef one type; |
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}; |
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template<class T> |
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inline BOOST_CONSTEXPR T operator/(const T& t, const one&) |
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{ |
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return(t); |
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} |
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template<class T> |
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inline BOOST_CONSTEXPR T operator/(const one&, const T& t) |
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{ |
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return(1/t); |
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} |
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inline BOOST_CONSTEXPR one operator/(const one&, const one&) |
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{ |
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return(one()); |
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} |
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template<class T> |
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inline BOOST_CONSTEXPR bool operator>(const boost::units::one&, const T& t) { |
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return(1 > t); |
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} |
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template<class T> |
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BOOST_CONSTEXPR T one_to_double(const T& t) { return t; } |
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inline BOOST_CONSTEXPR double one_to_double(const one&) { return 1.0; } |
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template<class T> |
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struct one_to_double_type { typedef T type; }; |
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template<> |
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struct one_to_double_type<one> { typedef double type; }; |
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} // namespace units |
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} // namespace boost |
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#endif
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