//

// Created by william on 2021/4/1.

//

static_assert(__cplusplus >= 201707);

#include <algorithm>

#include <functional>

#if __has_include(<bit>)

#include <bit>

#endif

#include <cassert>

#include <cmath>

#include <iostream>

#include <map>

#include <memory>

#include <thread>

#include <vector>

#if __cpp_impl_coroutine

#include <coroutine>

#endif

#include <sstream>

#if __has_include(<concepts>)

#include <concepts>

#endif

using namespace std;

void init_20()

{

struct point

{

int x, y;

};

struct line

{

point a, b;

};

point p1 = { .x = 1 };

assert(p1.x == 1);

assert(!p1.y);

point p2{ {}, 2 };

assert(p2.y == 2);

assert(!p2.x);

line l1 = {};

assert(!l1.a.x);

line l3 = { 1, 2, 3, 4 };

assert(l3.b.x == 3);

assert(l3.b.y == 4);

}

void types_20()

{

//#if __cpp_lib_bit_cast

// std::cout << typeid(bit_cast<double>());

//#endif

}

void cpp20Test()

{

}