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add typed sprout::get

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bolero-MURAKAMI 2015-04-10 19:54:05 +09:00
parent 530bc92d0c
commit 84b6d5d994
9 changed files with 190 additions and 4 deletions
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15
sprout/tuple/tuple/get.hpp
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@ -19,6 +19,9 @@
#include <sprout/tuple/tuple/tuple_element.hpp>
#include <sprout/tuple/tuple/tuple_traits.hpp>
#include <sprout/tuple/tuple/tuple_access_traits.hpp>
#include <sprout/type/algorithm/find_index.hpp>
#include <sprout/type/algorithm/count.hpp>
#include <sprout/type_traits/remove_cvref.hpp>
#include <sprout/adl/not_found.hpp>
namespace sprout {
@ -107,6 +110,18 @@ namespace sprout {
return sprout_tuple_detail::call_tuple_get<I>(SPROUT_FORWARD(T, t));
}
//
// get
//
template<typename Type, typename T>
inline SPROUT_CONSTEXPR decltype(sprout::tuples::get<(sprout::types::find_index<typename sprout::remove_cvref<T>::type, Type>::value)>(std::declval<T>()))
get(T&& t)
SPROUT_NOEXCEPT_IF_EXPR(sprout::tuples::get<(sprout::types::find_index<typename sprout::remove_cvref<T>::type, Type>::value)>(std::declval<T>()))
{
static_assert(sprout::types::count<typename sprout::remove_cvref<T>::type, Type>::value == 1, "Requires: The type 'Type' occurs exactly once in type list.");
return sprout::tuples::get<(sprout::types::find_index<typename sprout::remove_cvref<T>::type, Type>::value)>(SPROUT_FORWARD(T, t));
}
//
// nested_get
//