名称隐藏在构造函数初始化列表中 [英] Name hiding in constructor initialization list

问题描述

我想修改构造函数以使用初始化列表，如以下示例所示：

I want to modify a constructor to use an initialization list as in the following example:

class Foo
{
public:
   Foo(std::wstring bar);
private:
   std::wstring bar;
};

// VERSION 1:

Foo::Foo(std::wstring bar) {this->bar = bar}

// VERSION 2:

Foo::Foo(std::wstring bar) : this->bar(bar) {} // ERROR!

<这个数据成员的指针，因为（我猜），他们在那一点还不存在。

Unfortunately I can't do version 2 because you can't use the this pointer for data members since (I'm guessing) they don't exist yet at that point. How then, do I deal with the name hiding issue (i.e. my parameter and my data member have the same name)?

推荐答案

如何处理名称隐藏问题（即我的参数和我的数据成员具有相同的名称）你不需要。第一个 bar 将引用成员，第二个 bar 将引用参数：

You don't need to. The first bar will refer to the member and the second bar will refer to the argument:

Foo::Foo(std::wstring bar) : bar(bar) {}

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