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add SFINAE: tuple flexibly construction

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This commit is contained in:
bolero-MURAKAMI 2013-03-29 19:19:40 +09:00
parent f905d1f02a
commit a1c119a9bb
3 changed files with 107 additions and 33 deletions
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78
sprout/tuple/tuple/tuple_decl.hpp
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@ -6,9 +6,11 @@
#include <type_traits>
#include <tuple>
#include <sprout/config.hpp>
#include <sprout/index_tuple.hpp>
#include <sprout/utility/forward.hpp>
#include <sprout/utility/move.hpp>
#include <sprout/utility/swap.hpp>
#include <sprout/utility/pack.hpp>
#include <sprout/utility/pair/pair_fwd.hpp>
#include <sprout/type_traits/is_convert_constructible.hpp>
#include <sprout/tpp/algorithm/all_of.hpp>
@ -241,12 +243,39 @@ namespace sprout {
{
private:
typedef sprout::tuples::detail::tuple_impl<0, Types...> impl_type;
private:
template<typename TndexTuple, typename... Utypes>
struct is_flexibly_constructible_impl;
template<sprout::index_t... Indexes, typename... Utypes>
struct is_flexibly_constructible_impl<sprout::index_tuple<Indexes...>, Utypes...>
: public sprout::tpp::all_of<
sprout::is_convert_constructible<
typename sprout::tppack_at<Indexes, Types...>::type,
typename sprout::tppack_at<Indexes, Utypes...>::type
>...
>
{};
public:
struct has_nothrow_swap
: public sprout::tpp::all_of_c<
SPROUT_NOEXCEPT_EXPR_OR_DEFAULT(sprout::swap(std::declval<Types&>(), std::declval<Types&>()), false)...
>
{};
template<typename... UTypes>
struct is_flexibly_constructible
: public is_flexibly_constructible_impl<
typename sprout::index_range<0, (sizeof...(UTypes) < sizeof...(Types) ? sizeof...(UTypes) : sizeof...(Types))>::type,
UTypes...
>
{};
template<typename... UTypes>
struct is_rvref_flexibly_constructible
: public is_flexibly_constructible<UTypes&&...>
{};
template<typename... UTypes>
struct is_clvref_flexibly_constructible
: public is_flexibly_constructible<UTypes const&...>
{};
public:
// tuple construction
SPROUT_CONSTEXPR tuple();
@ -288,23 +317,58 @@ namespace sprout {
>::type
>
SPROUT_CONSTEXPR tuple(sprout::pair<UTypes...>&& t);
template<typename... UTypes>
template<
typename... UTypes,
typename = typename std::enable_if<
is_rvref_flexibly_constructible<UTypes...>::value
>::type
>
explicit SPROUT_CONSTEXPR tuple(sprout::tuples::flexibly_construct_t, UTypes&&... elements);
template<typename... UTypes>
template<
typename... UTypes,
typename = typename std::enable_if<
is_clvref_flexibly_constructible<UTypes...>::value
>::type
>
SPROUT_CONSTEXPR tuple(sprout::tuples::flexibly_construct_t, sprout::tuples::tuple<UTypes...> const& t);
template<typename... UTypes>
template<
typename... UTypes,
typename = typename std::enable_if<
is_rvref_flexibly_constructible<UTypes...>::value
>::type
>
SPROUT_CONSTEXPR tuple(sprout::tuples::flexibly_construct_t, sprout::tuples::tuple<UTypes...>&& t);
template<typename... UTypes>
template<
typename... UTypes,
typename = typename std::enable_if<
is_clvref_flexibly_constructible<UTypes...>::value
>::type
>
SPROUT_CONSTEXPR tuple(sprout::tuples::flexibly_construct_t, sprout::pair<UTypes...> const& t);
template<typename... UTypes>
template<
typename... UTypes,
typename = typename std::enable_if<
is_rvref_flexibly_constructible<UTypes...>::value
>::type
>
SPROUT_CONSTEXPR tuple(sprout::tuples::flexibly_construct_t, sprout::pair<UTypes...>&& t);
// tuple assignment
tuple& operator=(tuple const& rhs);
tuple& operator=(tuple&& rhs)
SPROUT_NOEXCEPT_EXPR(sprout::tpp::all_of<std::is_nothrow_move_assignable<Types>...>::value);
template<typename... UTypes>
template<
typename... UTypes,
typename = typename std::enable_if<
sizeof...(Types) == sizeof...(UTypes) && sprout::tpp::all_of<std::is_assignable<Types&, UTypes const&>...>::value
>::type
>
tuple& operator=(sprout::tuples::tuple<UTypes...> const& rhs);
template<typename... UTypes>
template<
typename... UTypes,
typename = typename std::enable_if<
sizeof...(Types) == sizeof...(UTypes) && sprout::tpp::all_of<std::is_assignable<Types&, UTypes&&>...>::value
>::type
>
tuple& operator=(sprout::tuples::tuple<UTypes...>&& rhs);
// tuple swap
void swap(tuple& other)