where String declares an explicit copy constructor: class String { public: String( const char * ); String( const String& ); ~String(); // ... }; In this case, the compiler needs to synthesize a copy constructor in order to invoke the copy constructor of the member class String object...
Yes, if you implement anexplicitcopy constructor, then it isyourresponsibility to make the "new" object an exact copy of the "original" object. This means that you have to properly initializeallfields of the "new" object, just as you would have to in a "normal" constructor. Except that...
destructor:析构函数 constructor:构造函数 copy constructor:拷贝构造函数 move constructor:移动构造函数 delegating constructor:代理构造函数 delegation cycle: 委派环 shollw copy:浅拷贝 deep copy:深拷贝 Move semantics:移动语义 xvalue,eXpiring Value:将亡值 prvlaue,Pure Rvalue:纯右值 Pass by value: 按值传...
// folders is implicitly initialized to the empty set explicit Message(const std::string &str = ""): contents(str) { } // copy control to manage pointers to this Message Message(const Message&); // copy constructor Message& operator=(const Message&); // copy assignment ~Message(); //...
explicit operator bool() 比运算符 unspecified-bool-type() 更严格。 explicit operator bool() 允许到 bool 的显式转换 - 例如,在给定 shared_ptr<X> sp 的情况下,bool b(sp) 和static_cast<bool>(sp) 都有效 - 允许对 bool 进行布尔值可测试的“上下文转换”- 例如,if (sp)、!sp、sp && 等。
explicitvector(doublex); //... } 错误#7:不将只读数据/方法标记为const 为什么这是一个错误? 有时,你的API会将来自客户端的一些数据结构作为输入。将方法和方法参数标记为const表示客户端将以只读模式使用该数据。相反,如果你没有将API方法和参数标记为const,那么你的客户可能倾向于向你传递数据副本,因为你没...
// spec1_explicit.cpp // compile with: /EHsc #include <stdio.h> class C { public: int i; explicit C(const C&) // an explicit copy constructor { printf_s("\nin the copy constructor"); } explicit C(int i ) // an explicit constructor { printf_s("\nin the constructor"); } C...
explicitvector(doublex); //... } 错误#7:不将只读数据/方法标记为const 有时,你的API会将来自客户端的一些数据结构作为输入。将方法和方法参数标记为const表示客户端将以只读模式使用该数据。相反,如果你没有将API方法和参数标记为const,那么你的客户可能倾向于向你传递数据副本,因为你没有做出此类保证。根据客...
google-explicit-constructor, google-runtime-operator, hicpp-exception-baseclass, hicpp-multiway-paths-covered, hicpp-signed-bitwise, misc-misplaced-const, misc-new-delete-overloads, misc-no-recursion, misc-non-copyable-objects, misc-redundant-expression, misc-static-assert, misc-throw-by-value-...