forked from enlightenment/efl
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
32 lines
733 B
32 lines
733 B
7 years ago
|
#ifndef EFL_EINA_EINA_ALIGNED_UNION_HH_
|
||
|
|
#define EFL_EINA_EINA_ALIGNED_UNION_HH_
|
||
|
|
|
||
|
|
namespace efl { namespace eina { namespace _mpl {
|
||
|
|
|
||
|
|
template <std::size_t...Numbers>
|
||
|
|
struct max;
|
||
|
|
|
||
|
|
template <std::size_t A0>
|
||
|
|
struct max<A0> : std::integral_constant<std::size_t, A0> {};
|
||
|
|
|
||
|
|
template <std::size_t A0, std::size_t A1, std::size_t...Args>
|
||
|
|
struct max<A0, A1, Args...> : max<(A0 > A1 ? A0 : A1), Args...> {};
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
// Workaround needed for GCC before 5.1
|
||
|
|
template <std::size_t Min, typename...Args>
|
||
|
|
struct aligned_union
|
||
|
|
{
|
||
|
|
static constexpr std::size_t alignment_value = _mpl::max<alignof(Args)...>::value;
|
||
|
|
|
||
|
|
typedef typename std::aligned_storage
|
||
|
|
< _mpl::max<Min, sizeof(Args)...>::value
|
||
|
|
, alignment_value >::type type;
|
||
|
|
};
|
||
|
|
|
||
|
|
} }
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|