Delegation(委托): Composition by reference String StringRep String 内部只有方法,具体的实现(Implementation)交给 StringRep Inheritance(继承):表示 is-a Base Derived 内存上,就是子类「包了」一个父类,父类的析构函数要加上 virtual 关键字 继承与多态: 数据的继承是直接 copy 一份下来,函数的继承是继承...
inheritance是is-a的关系 composition是has-a的关系 TODO
If the name of a base class can be reached through multiple paths in a multiple-inheritance lattice, it is accessible if it is accessible through any path. If a single entity is reachable through several paths, we can still refer to it without ambiguity. struct B { int m; static int sm...
All the C++ 'guru' books and articles are full of excellent and detailed advice on when it's best to use inheritance vs composition. If you're not already familiar with the received wisdom in these matters, then do some reading!Miscellaneous...
Item 1 Iterator: (1): 注意当前迭代器是否有效,如果无效则解引用产生程序错误; (2):注意当前迭代器生命期,某些容器经过某些操作后将重新分配内部存储空间,则当前迭代器无效; (3) : 有效范围, 类似find(first, last, value)时, 迭代器first 必须在last之前,必须保证指向同一个容器; ...
InheritanceBehavior 获取或设置属性值继承、资源键查找和RelativeSource FindAncestor 查找的范围限制。 (继承自 FrameworkElement) InputBindings 获取与此元素关联的输入绑定的集合。 (继承自 UIElement) InputScope 获取或设置此 FrameworkElement 使用的输入的上下文。 (继承自 FrameworkElement) InternalChildren...
复杂的内联函数的定义,应放在后缀名为-inl.h的头文件中。 在头文件中给出内联函数的定义,可令编译器将其在调用处内联展开。然而,实现代码应完全放到.cc文件 中,我们丌希望.h文件中出现太多实现代码,除非返样做在可诺性和效率上有明显优势。 如果内联函数的定义比轳短小、逻辑比轳简单,其实现代码可以放在.h文...
Composition is often more appropriate. Try to restrict use of inheritance to the "is-a" case: Bar subclasses Foo if it can reasonably be said that Bar "is a kind of" Foo. Limit the use of protected to those member functions that might need to be accessed from subclasses. Note that ...
a bug of inheritance ? #608 std::map key conversion with to_json #607 json.hpp:6384:62: error: wrong number of template arguments (1, should be 2) #606 Incremental parsing: Where's the push version? #605 Is there a way to validate the structure of a json object ? #604 ...