std::experimental::reflect::ObjectSequence

< cpp‎ | experimental‎ | reflect

在标头 `<experimental/reflect>` 定义
template< class T > concept bool ObjectSequence = Object<T> && /* see below */;		(反射 TS)

ObjectSequence 概念为元对象序列类型所满足。

元对象序列类型是从生成序列的元对象操作，如 get_data_members 获得的元对象类型。元对象序列类型中的每个元素均为元对象类型。

示例

#include<type_traits>
#include<tuple>
#include<cmath>
#include<experimental/reflect>
 
using reflect = std::experimental::reflect;
 
template<reflect::Typed... Ms>
using tuple_from_seq_t = std::tuple<reflect::get_reflected_type_t<
    reflect::get_type_t<Ms>>...>;
 
template<reflect::Record T>
using collect_tuple = reflect::unpack_sequence_t<
    tuple_from_seq_t,
    reflect::get_data_members<T>>;
 
int main()
{
    static_assert(reflect::ObjectSequence<
                      reflect::get_data_members<reflexpr(std::div_t)>>, "");
    static_assert(std::is_same<collect_tuple<reflexpr(std::div_t)>,
                               std::tuple<int, int>>::value, "");
}

参阅

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原因：模板化