0b6a182c
 Hu Chunming
添加无鉴权注册和注销
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// Boost.Units - A C++ library for zero-overhead dimensional analysis and
// unit/quantity manipulation and conversion
//
// Copyright (C) 2003-2008 Matthias Christian Schabel
// Copyright (C) 2008 Steven Watanabe
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_UNITS_DETAIL_ONE_HPP
#define BOOST_UNITS_DETAIL_ONE_HPP
#include <boost/units/operators.hpp>
namespace boost {
namespace units {
struct one { BOOST_CONSTEXPR one() {} };
// workaround for pathscale.
inline BOOST_CONSTEXPR one make_one() {
return(one());
}
template<class T>
struct multiply_typeof_helper<one, T>
{
typedef T type;
};
template<class T>
struct multiply_typeof_helper<T, one>
{
typedef T type;
};
template<>
struct multiply_typeof_helper<one, one>
{
typedef one type;
};
template<class T>
inline BOOST_CONSTEXPR T operator*(const one&, const T& t)
{
return(t);
}
template<class T>
inline BOOST_CONSTEXPR T operator*(const T& t, const one&)
{
return(t);
}
inline BOOST_CONSTEXPR one operator*(const one&, const one&)
{
return(one());
}
template<class T>
struct divide_typeof_helper<T, one>
{
typedef T type;
};
template<class T>
struct divide_typeof_helper<one, T>
{
typedef T type;
};
template<>
struct divide_typeof_helper<one, one>
{
typedef one type;
};
template<class T>
inline BOOST_CONSTEXPR T operator/(const T& t, const one&)
{
return(t);
}
template<class T>
inline BOOST_CONSTEXPR T operator/(const one&, const T& t)
{
return(1/t);
}
inline BOOST_CONSTEXPR one operator/(const one&, const one&)
{
return(one());
}
template<class T>
inline BOOST_CONSTEXPR bool operator>(const boost::units::one&, const T& t) {
return(1 > t);
}
template<class T>
BOOST_CONSTEXPR T one_to_double(const T& t) { return t; }
inline BOOST_CONSTEXPR double one_to_double(const one&) { return 1.0; }
template<class T>
struct one_to_double_type { typedef T type; };
template<>
struct one_to_double_type<one> { typedef double type; };
} // namespace units
} // namespace boost
#endif
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