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https://github.com/bolero-MURAKAMI/Sprout.git
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56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
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#ifndef SPROUT_MATH_FLOAT_PROMOTE_HPP
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#define SPROUT_MATH_FLOAT_PROMOTE_HPP
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#include <type_traits>
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#include <sprout/config.hpp>
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namespace sprout {
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namespace math {
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namespace detail {
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template<bool IsArithmetic, typename Current, typename Head, typename... Tail>
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struct float_promote_impl {};
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template<typename Current, typename Head>
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struct float_promote_impl<true, Current, Head>
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: public std::conditional<
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(std::is_same<Current, long double>::value || std::is_same<Head, long double>::value),
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long double,
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double
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>
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{};
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template<typename Current, typename Head, typename... Tail>
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struct float_promote_impl<true, Current, Head, Tail...>
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: public sprout::math::detail::float_promote_impl<
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std::is_arithmetic<Head>::value,
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typename std::conditional<
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(std::is_same<Current, long double>::value || std::is_same<Head, long double>::value),
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long double,
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double
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>::type,
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Tail...
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>
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{};
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template<typename Head, typename... Tail>
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struct float_promote
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: public sprout::math::detail::float_promote_impl<
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std::is_arithmetic<Head>::value,
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double,
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Head, Tail...
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>
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{};
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} // namespace detail
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//
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// float_promote
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//
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template<typename... Types>
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struct float_promote
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: public sprout::math::detail::float_promote<
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typename std::remove_cv<Types>::type...
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>
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{};
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} // namespace math
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} // namespace sprout
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#endif // #ifndef SPROUT_MATH_FLOAT_PROMOTE_HPP
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