// d2mcpp: https://github.com/mcpp-community/d2mcpp

// license: Apache-2.0

// file: src/cpp11/tests/11-inherited-constructors/2.cpp

//

// Exercise/练习: cpp11 | 11 - inherited constructors | 继承构造函数在泛型装饰器的应用

//

// Tips/提示: 根据编译器的输出和报错信息, 模仿NoCopy类模板, 实现一个NoMove类模板

// 让被NoMove修饰的类, 创建出来的对象不支持移动语义

//

// Docs/文档:

// - https://en.cppreference.com/w/cpp/language/using_declaration.html#Inheriting_constructors

// - https://mcpp-community.github.io/d2mcpp/cpp11/11-inherited-constructors.html

//

// Auto-Checker/自动检测命令:

//

// d2x checker inherited-constructors

//

import std;

import d2x;

struct Point {

double mX, mY;

Point() : mX { 0 }, mY { 0 } { }

Point(double x, double y) : mX { x }, mY { y } { }

std::string to_string() const {

return "{ " + std::to_string(mX)

+ ", " + std::to_string(mY) + " }";

}

};

template <typename T>

class NoCopy : public T {

public:

using T::T;

NoCopy(const NoCopy&) = delete;

NoCopy& operator=(const NoCopy&) = delete;

NoCopy(NoCopy&&) = default;

NoCopy& operator=(NoCopy&&) = default;

};

int main() {

Point p1(1, 1);

NoCopy<Point> p2(2, 2);

std::cout << "p1: " << p1.to_string() << std::endl;

std::cout << "p2: " << p2.to_string() << std::endl;

auto p11 = p1;

std::cout << "p11: " << p11.to_string() << std::endl;

d2x::check_eq(p1.mX, p11.mX, "p1.mX == p11.mX");

d2x::check_eq(p1.mY, p11.mY, "p1.mY == p11.mY");

decltype(p2) p22 = p2; // by std::move?

std::cout << "p22: " << p22.to_string() << std::endl;

d2x::check_eq(p2.mX, p22.mX, "p2.mX == p22.mX");

d2x::check_eq(p2.mY, p22.mY, "p2.mY == p22.mY");

NoMove<Point> p3(3, 3);

std::cout << "p3: " << p3.to_string() << std::endl;

NoMove<Point> p33(0, 0);

p33 = std::move(p3); // by copy?

std::cout << "p33: " << p33.to_string() << std::endl;

d2x::check_eq(p3.mX, p33.mX, "p3.mX == p33.mX");

d2x::check_eq(p3.mY, p33.mY, "p3.mY == p33.mY");

d2x::wait();

return 0;

}