C++ 左值变右值

最新推荐文章于 2025-03-22 09:43:57 发布

crazyacm

最新推荐文章于 2025-03-22 09:43:57 发布

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分类专栏： C++prime C++基础巩固

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template<class T>
struct MyRemoveRef
{
	typedef T type;
};

void static_cast_test()
{
	std::string str = "hello";
	std::string str1 = "hello";
	std::string str2 = "hello";
	std::string str3 = "hello";


	//变右值方式1
	std::string test_str = static_cast<typename MyRemoveRef<std::string &&>::type &&> (str);

	//std::move也可以
	std::string test_str1 = std::move(str1);
	
	//变右值方式2
	std::string test_str2 = (static_cast<std::remove_reference_t<std::string> &&>(str2));

	//变右值方式3
	std::string test_str3 = static_cast<std::string &&> (str3);


	std::cout << "test_str:'" << test_str << "' and str: '" <<str <<"'" << std::endl;
	std::cout << "test_str1:'" << test_str1 << "' and str1: '" << str1 << "'" << std::endl;
	std::cout << "test_str2:'" << test_str2 << "' and str2: '" << str2 << "'" << std::endl;
	std::cout << "test_str3:'" << test_str3 << "' and str3: '" << str3 << "'" << std::endl;
}