是否有开销使用this->在c ++？ [英] Is there overhead using this-> in c++?

问题描述

我有一个类，如果我想从一个成员函数中引用一个成员变量，我可以写：

I have a class, and if I wish to reference a member variable from within a member function, i could write:

this-> myVar = 10 //例如

或者我可以写：

myVar = 10

我喜欢使用this->，因为它明确声明变量是此类的成员，只是使用变量名称本身？

I like to use this-> because it explicitly declares that the variable is a member of this class, but does it occur any overhead in comparison to just using the variable name by itself?

作为替代，我可以在vars添加一个唯一的前缀，如 _TmyVar

As an alternative I could maybe add a unique prefix to the vars, such as _TmyVar, but I've been using this-> for a long time so I just wondered.

提前感谢Tom。

推荐答案

没有开销。编译器将为这两个版本生成完全相同的代码。

There is no overhead. The compiler will generate the exact same code for both versions.

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