forked from enlightenment/efl
65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
///
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/// @file eo_concrete.hh
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///
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#ifndef EFL_CXX_EINA_COPY_TRAITS_HH
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#define EFL_CXX_EINA_COPY_TRAITS_HH
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namespace efl { namespace eina {
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namespace _impl {
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template<bool...> struct bool_pack;
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template <bool...Args>
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struct and_ : std::is_same<bool_pack<Args..., true>, bool_pack<true, Args...>> {};
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}
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template <typename... Args>
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struct variant;
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template <typename T, typename Enable = void>
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struct copy_from_c_traits;
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template <typename T>
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struct copy_from_c_traits<T, typename std::enable_if<std::is_fundamental<T>::value>::type>
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{
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static void copy_to_unitialized(T* storage, void const* data)
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{
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std::memcpy(storage, data, sizeof(T));
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}
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};
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template <typename...Args>
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struct copy_from_c_traits<eina::variant<Args...>,
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typename std::enable_if<_impl::and_<std::is_fundamental<Args>::value...>::value>::type>
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{
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template <typename T>
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static void copy_to_unitialized(eina::variant<Args...>* storage, T const* data)
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{
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new (storage) eina::variant<Args...>{*data};
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}
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};
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template <typename T, typename Enable = void>
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struct alloc_to_c_traits;
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template <typename T>
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struct alloc_to_c_traits<T, typename std::enable_if<std::is_fundamental<T>::value>::type>
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{
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typedef T c_type;
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static c_type* copy_alloc(T const& value)
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{
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c_type* v = static_cast<c_type*>(malloc(sizeof(c_type)));
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std::memcpy(v, &value, sizeof(c_type));
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return v;
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}
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static void free_alloc(void* data)
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{
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::free(data);
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}
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};
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} }
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#endif
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