C ++继承的模板类无权访问基类 [英] C++ Inherited template classes don't have access to the base class

问题描述

我第一次使用模板类，并尝试找出为什么编译器似乎不喜欢当我使用继承。

I am working with template classes for the first time, and trying to figure out why the compiler doesn't seem to like when I use inheritence.

这里是代码：

template <typename T>
struct xPoint2
{
    T x;
    T y;

    xPoint2() { x = 0; y = 0; };
};

template <typename T>
struct xVector2 : xPoint2<T>
{
    xVector2() { x = 0; y = 0; };
};

编译器输出：

vector2.hh: In constructor ‘xVector2<T>::xVector2()’:
vector2.hh:11: error: ‘x’ was not declared in this scope
vector2.hh:11: error: ‘y’ was not declared in this scope

谢谢

推荐答案

通过使用 this-> x 和 this-> y 来帮助编译器。

You need to help the compiler out by using this->x and this->y.

http://www.parashift.com/c++- faq / templates.html＃faq-35.19

这篇关于C ++继承的模板类无权访问基类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！