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add default_construct

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This commit is contained in:
bolero-MURAKAMI 2014-09-22 10:40:52 +09:00
parent 3b0ab6f5fd
commit 2979248623
6 changed files with 80 additions and 111 deletions
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44
sprout/tpp/algorithm/max_element.hpp
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@ -8,41 +8,45 @@
#ifndef SPROUT_TPP_ALGORITHM_MAX_ELEMENT_HPP
#define SPROUT_TPP_ALGORITHM_MAX_ELEMENT_HPP
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/workaround/std/cstddef.hpp>
#include <sprout/type_traits/integral_constant.hpp>
#include <sprout/type_traits/common_decay.hpp>
#include <sprout/type/type_tuple.hpp>
namespace sprout {
namespace tpp {
namespace detail {
template<typename T, T... Values>
struct max_element_impl;
template<typename T, T Value>
struct max_element_impl<T, Value>
: public sprout::integral_constant<T, Value>
template<typename T, typename U>
struct max_value
: public std::conditional<(T::value < U::value), U, T>
{};
template<typename T, T Value1, T Value2>
struct max_element_impl<T, Value1, Value2>
: public sprout::integral_constant<T, (Value1 < Value2 ? Value2 : Value1)>
template<typename Tup, std::size_t First, std::size_t Last, bool = (Last - First == 1)>
struct max_element_impl
: public std::tuple_element<First, Tup>::type
{};
template<typename T, T Value1, T Value2, T... Tail>
struct max_element_impl<T, Value1, Value2, Tail...>
: public sprout::tpp::detail::max_element_impl<T, sprout::tpp::detail::max_element_impl<T, Value1, Value2>::value, Tail...>
template<typename Tup, std::size_t First, std::size_t Last>
struct max_element_impl<Tup, First, Last, false>
: public sprout::tpp::detail::max_value<
typename sprout::tpp::detail::max_element_impl<Tup, First, (First + Last) / 2>::type,
typename sprout::tpp::detail::max_element_impl<Tup, (First + Last) / 2, Last>::type
>::type
{};
} // namespace detail
//
// max_element_c
//
template<typename T, T... Values>
struct max_element_c
: public sprout::tpp::detail::max_element_impl<T, Values...>
{};
//
// max_element
//
template<typename... Types>
struct max_element
: public sprout::tpp::max_element_c<typename sprout::common_decay<decltype(Types::value)...>::type, Types::value...>
: public sprout::tpp::detail::max_element_impl<sprout::types::type_tuple<Types...>, 0, sizeof...(Types)>
{};
//
// max_element_c
//
template<typename T, T... Values>
struct max_element_c
: public sprout::tpp::max_element<sprout::integral_constant<T, Values>...>
{};
} // namespace tpp
} // namespace sprout