将std :: vector重命名为另一个类以重载？ [英] Rename std::vector to another class for overloading?

问题描述

查看此代码。

#include <vector>

template<class ...Args>
using other_vector = std::vector<Args...>;

template<class T>
void f(std::vector<T>& ) {}
template<class T>
void f(other_vector<T>& ) {}

int main()
{
    other_vector<int> b;
    f(b);
    return 0;
}

它不编译，因为 f 正在重新声明。我完全理解错误。但是，我需要一个类似 std :: vector< T> 的第二个类，但将被视为一个不同的类型，因此重载，

It does not compile, because f is being redeclared. I totally understand the error. However, I need a second class that behaves like std::vector<T>, but will be seen as a different type, so that overloading, like in the above example, would be legal.

我可以做什么？

• 让新类具有 std :: vector< T> 作为基类。这可能会工作，但不应继承std容器。


• 让新类有一个类型为std :: vector的成员，然后redeclare所有函数重定向到成员的函数。听起来很多工作。

• Let the new class have std::vector<T> as a base class. This might work, but one should not inherit from std containers.
• Let the new class have a member of type std::vector and then redeclare all functions to redirect to the functions of the member. Sounds like a lot of work.

更好的选择吗？

推荐答案

您可能会试图混淆分配器：

You might try to mess with the allocator:

template<class T>
struct allocator_wrapper : T { using T::T; };

template<class T, class A = std::allocator<T>>
using other_vector = std::vector<T, allocator_wrapper<A>>;

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