有一种方法来标记（在编译时）“覆盖”签名不匹配基本签名的方法？ [英] Is there a way to flag (at compile time) "overriden" methods whose signatures don't match base signature?

问题描述

基本上，我想要在我的C ++代码中的 override 关键字的C＃编译器功能。

Basically, I want the C# compiler functionality of its override keyword in my C++ code.

class Base
{
   virtual int foo(int) const;
};

class Derived : public Base
{
   virtual int foo(int); // wanted to override Base, but forgot to declare it const
};

我们都知道，上面的代码会编译正常，但会产生一些奇怪的运行时行为。我会喜欢我的C ++编译器捕捉我的可怜的实现与像C＃的覆盖关键字。是否有任何关键字像重写被引入到C + +，或者我们被卡住 #define override virtual 来显示我们的意图？ （实际上，我不这样做 - 我讨厌使用preprossor来扩展语言）。

As we all know, the above code will compile fine, but yield some strange runtime behavior. I would love my C++ compiler to catch my poor implementation with something like C#'s override keyword. Are there any keywords like "override" being introduced into C++, or are we stuck with #define override virtual to show our intent??? (actually, I do not do this - I hate using the preprossor to "extend" the language).

推荐答案

等待C ++ 0x，Visual C ++已经有这个覆盖关键字。 （自2005年以来我相信）。语法是：

If you can't wait for C++0x, Visual C++ already has this override keyword. (Since 2005 I believe). There the syntax is:

virtual int foo(int) override;

但是，您没有义务输入。它是一个非标准的微软扩展。

You're not obliged to type it, however. And its a non-standard microsoft extension.

这篇关于有一种方法来标记（在编译时）“覆盖”签名不匹配基本签名的方法？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！