#include<type_traits>

template< class T >
struct is_trivially_move_constructible;

std::is_trivially_move_constructible<T>::value

// C++ program to demonstrate
// std::is_trivially_move_constructible
#include <iostream>
#include <type_traits>
using namespace std;
  
// Declaration of classes
class A {
};
  
class B {
    B() {}
};
  
enum class C : int { x,
                     y,
                     z };
  
class D {
    int v1;
    double v2;
  
public:
    D(int n)
        : v1(n), v2()
    {
    }
    D(int n, double f)
    noexcept : v1(n), v2(f) {}
};
  
int main()
{
    cout << boolalpha;
  
    // Check if int is trivially
    // move constructible or not
    cout << "int: "
         << is_trivially_move_constructible<int>::value
         << endl;
  
    // Check if class A is trivially
    // move constructible or not
    cout << "class A: "
         << is_trivially_move_constructible<A>::value
         << endl;
  
    // Check if class B is trivially
    // move constructible or not
    cout << "class B: "
         << is_trivially_move_constructible<B>::value
         << endl;
  
    // Check if enum class C is trivially
    // move constructible or not
    cout << "enum class C: "
         << is_trivially_move_constructible<C>::value
         << endl;
  
    // Check if class D is trivially
    // move constructible or not
    std::cout << "class D: "
              << is_trivially_move_constructible<D>::value
              << endl;
    return 0;
}

int: true
classA: true
class B: true
enum class C: true
class D: true

// C++程序演示
// std::is_trivially_move_constructible
#include <iostream>
#include <type_traits>
using namespace std;
  
// 声明结构体
struct Ex1 {
    Ex1() {}
    Ex1(Ex1&&)
    {
        cout << "抛出移动构造函数！";
    }
    Ex1(const Ex1&)
    {
        cout << "抛出复制构造函数！";
    }
};
  
struct Ex2 {
    Ex2() {}
    Ex2(Ex2&&) noexcept
    {
        cout << "不抛出移动构造函数！";
    }
    Ex2(const Ex2&) noexcept
    {
        cout << "不抛出复制构造函数！";
    }
};
  
// 主函数
int main()
{
    cout << boolalpha;
  
    // 检查结构体Ex1是否可以移动构造
    cout << "Ex1是否可以移动构造？"
         << is_move_constructible<Ex1>::value
         << '\n';
  
    // 检查结构体Ex1是否是平凡移动构造的
    cout << "Ex1是否是平凡移动构造的？"
         << is_trivially_move_constructible<Ex1>::value
         << '\n';
  
    // 检查结构体Ex2是否是平凡移动构造的
    cout << "Ex2是否是平凡移动构造的？"
         << is_trivially_move_constructible<Ex2>::value
         << '\n';
}

Ex1是否可以移动构造？true
Ex1是否是平凡移动构造的？false
Ex2是否是平凡移动构造的？false