如何区分操作符++的前缀和后缀形式之间（当重载时）？ （C ++） [英] How to differentiate (when overloading) between prefix and postfix forms of operator++? (C++)

问题描述

因为我为迭代器类重载了运算符++

Because I've overloaded the operator++ for an iterator class

template<typename T>
typename list<T>::iterator& list<T>::iterator::operator++()
{
    //stuff
}

$ b b

但是当我尝试做

But when I try to do

list<int>::iterator IT;
IT++;

我收到有关没有postifx的警告 ++ ，使用前缀形式。我如何具体重载前缀/ postifx形式？

I get a warning about there being no postifx ++, using prefix form. How can I specifically overload the prefix/postifx forms?

推荐答案

编写相同的操作符重载的版本， int 类型。

Write a version of the same operator overload, but give it a parameter of type int. You don't have to do anything with that parameter's value.

如果您有兴趣了解一下此语法是如何传递的，请访问这里有一个代码段。

If you're interested in some history of how this syntax was arrived out, there's a snippet of it here.

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