std::experimental::reflect::Object
来自 cppreference.com
< cpp | experimental | reflect
在头文件 <experimental/reflect> 中定义 |
||
template< class T > concept Object = /* see below */; |
(反射 TS) | |
当且仅当 T
是元对象类型时,Object
概念才满足。
[编辑] 示例
运行此代码
#include <experimental/reflect> namespace reflect = std::experimental::reflect; template<reflect::Object M> struct meta_t { template<reflect::Object M1> friend constexpr bool operator==(meta_t, meta_t<M1>) noexcept { return reflect::reflects_same_v<M, M1>; } template<reflect::Object M1> friend constexpr bool operator!=(meta_t, meta_t<M1>) noexcept { return !reflect::reflects_same_v<M, M1>; } }; template<reflect::Object M> constexpr meta_t<M> meta{}; int main() { static_assert(meta<reflexpr(int)> == meta<reflexpr(signed int)>, ""); // meta<int>; // error: int is not a meta-object type }