std::make_unique,std::make_unique_for_overwrite C++ Memory management library std::unique_ptr Defined in header<memory> (1) template<classT,class...Args> unique_ptr<T>make_unique(Args&&...args); (since C++14) (until C++23) (only for non-array types) ...
unique_resource::get_deleter unique_resource::operator*unique_resource::operator-> Non-member functions make_unique_resource_checked Deduction guides Defined in header <experimental/scope> template< class R, class D, class S = std::decay_t<R> > std::experimental::unique_resource<std::decay_...
new/delete 消除 constexpr 函數上放鬆的限制 二進制字面量 數位分隔符 函數的返回類型推導 帶默認成員初始化器的聚合類。 新庫功能特性 std::make_unique std::shared_timed_mutex與std::shared_lock std::integer_sequence std::exchange std::quoted ...
std::unique_ptr是一种智能指针,它通过指针持有并管理另一对象(对其负责),并在unique_ptr离开作用域时释放该对象。 在发生下列两者之一时,用关联的删除器释放对象: 管理它的unique_ptr对象被销毁。 通过operator=或reset()赋值另一指针给管理它的unique_ptr对象。
scope_exit−scope_fail−scope_success−unique_resource Parallelism library extensions v2 (parallelism TS v2) simd Concurrency library extensions (concurrency TS) Transactional Memory(TM TS) Reflection(reflection TS) External Links−Non-ANSI/ISO Libraries−Index−std Symbol Index ...
(http://en.cppreference.com/w/cpp/memory/unique_ptr/make_unique): <urlopen error [Errno 101] Network is unreachable> URL failed (http://en.cppreference.com/w/cpp/memory/weak_ptr): <urlopen error [Errno 101] Network is unreachable> URL failed (http://en.cppreference.com/w/cpp/...
分析其原因是:如果未使用 UNIQUE 属性创建聚集索引,数据库引擎将向表自动添加一个四字节 uniqueifier 列。必要时,数据库引擎 将向行自动添加一个 uniqueifier 值,使每个键唯一。此列和列值供内部使用,用户不能查看或访问。 第三:是不是聚集索引就一定要比非聚集索引性能优呢? 如果想查询学分在60-90之间的学生...
Run cmake (or cmake3 if you are on CentOS or RHEL) to configure:cmake ..See the advanced installation section for configuration options.Run cmake again to build and install the library:cmake --build . sudo cmake --build . --target installSee this section for information on how to ...
unique_ptr // 创建方式1:使用 make_unique (C++14) auto p1 = std::make_unique<int>(42); // 创建方式2:直接构造 std::unique_ptr<int> p2(new int(42)); // 访问资源 std::cout << *p1 << std::endl; *p1 = 100; // 获取原始指针(不转移所有权) int* raw = p1.get(); // 释...
duringaggregate initialization, a default-constructed variant holds a value of its first alternative, unless that alternative is not default-constructible (in which case the variant is not default-constructible either). The helper classstd::monostatecan be used to make such variants default-...