Not only does it slow down the program due to the virtual function indirect call, it is also an opaque wall where no metaprogram can get past.
它不仅因为虚拟函数的间接调用降低了程序的速度，它还是一堵不透明的墙，元编程无法穿过它。
Virtual function
英语例句库
中文百科
虚函数 (进程语言)
虚函数是面向对象进程设计中的一个重要的概念。只能适用于指标和参考的计算机工程运算。当从父类中继承的时候，虚函数和被继承的函数具有相同的签名。但是在运行过程中，运行系统将根据对象的zh:型别，自动地选择适当的具体实现运行。虚函数是面向对象编程实现多态的基本手段。
虚函数在设计模式方面扮演重要角色。例如，《设计模式》一书中提到的23种设计模式中，仅5个对象创建模式就有4个用到了虚函数（抽象工厂、工厂方法、生成器、原型），只有单体没有用到。
英语百科
Virtual function 虚函数 (程序语言)
In object-oriented programming, a virtual function or virtual method is an inheritable and overridable function or method for which dynamic dispatch is facilitated. This concept is an important part of the (runtime) polymorphism portion of object-oriented programming (OOP).
- refuse their consent的意思
- refuse the note的意思
- refuse tip的意思
- refuse tippler的意思
- refuse to的意思
- refuse to burn的意思
- refuse to do的意思
- refuse to pay tax的意思
- refuse to take delivery的意思
- refuse to take money的意思
- refuse transfer station的意思
- refuse treatment的意思
- refuse treatment, refuse disposal的意思
- refuse treatment ship的意思
- refuse utilization plant的意思
- refuse vehicle的意思
- refuse vehicle with charging piston的意思
- refuse vehicle with compactor for compressin g refuse的意思
- refuse vehicle with conveyer belt for the refuse的意思
- refuse vehicle with conveyer wheel for the refuse的意思
- refuse vehicle with discharging device的意思
- refuse vehicle with elevator for the refuse receptacle的意思
- refuse vehicle with endless conveyer for the refuse的意思
- refuse vehicle with hoist for the refuse receptacle的意思
- refuse vehicle with lifting and tipping device for refuse receptacles的意思