需要虚拟函数覆盖来使用override关键字 [英] Requiring virtual function overrides to use override keyword

问题描述

C ++ 11添加了覆盖，以确保您编写的成员函数旨在覆盖基类虚拟函数实际上做（或不会编译）。

C++11 added override to ensure that member functions you write that you intend to override base-class virtual functions actually do (or won't compile).

但是在一个大对象层次结构中，有时你可能会意外地写一个成员函数，当你不打算覆盖一个基类虚拟。例如：

But in a large object hierarchy, sometimes you could accidentally end up writing a member function that overrides a base-class virtual when you didn't intend it. For instance:

struct A {
    virtual void foo() { }  // because obv every class has foo().
};

struct B : A { ... };

class C : B {
private:
    void foo() {
        // was intended to be a private function local to C
        // not intended to override A::foo(), but does
    }
};

是否有一些编译器标志/扩展，至少会在 C :: foo ？为了可读性和正确性，我只是想强制所有的覆盖使用 override 。

Is there some compiler flag/extension that would at least issue a warning on C::foo ? For readability and correctness, I just would like to enforce that all overrides use override.

推荐答案

看起来像GCC 5.1版本完全添加了我正在查找的警告：

-Wsuggest-override

       警告覆盖未使用override关键字标记的虚拟函数。

-Wsuggest-override
       Warn about overriding virtual functions that are not marked with the override keyword.

使用 -Wsuggest-override 编译 -Werror = suggest-override 会强制所有覆盖使用 override 。

Compiling with -Wsuggest-override -Werror=suggest-override would then enforce that all overrides use override.

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