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std::experimental::reflect:: ObjectSequence

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定义于头文件 <experimental/reflect>
template < class T >
concept ObjectSequence = Object < T > && /* 见下文 */ ;
(反射 TS)

满足 ObjectSequence 概念的是元对象序列类型。

元对象序列类型是一种通过生成序列的元对象操作获得的元对象类型，例如 get_data_members 。元对象序列类型的每个元素都是一个元对象类型。

示例

运行此代码 
#include<cmath>
#include<experimental/reflect>
#include<tuple>
#include<type_traits>
namespace 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<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, "");
}

参见

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