C++ std::integral_constant

头文件：#include<type_traits>

可能的实现:

template<class T,T v>
struct integral_constant{
    static constexpr T value = v;
    using value_type = T;
    using type = integral_constant;
    constexpr operator value_type() const noexcept { return value; }
    constexpr value_type operator()() const noexcept { return value; } // if __cplusplus > 201103L.
}

std::integral_constant 包装(wrap)一个指定类型T的一个静态常量，它是C++类型特征(The C++ type traits)的基类。

• Member constants

• Member constants

• Member function

标签：std,constant,integral,value,static,operator,type
来源： https://www.cnblogs.com/iuyy/p/14279181.html