C ++成员函数与自由函数 [英] C++ Member Functions vs Free Functions
问题描述
我在编写程序时很多时候对这个设计决定感到困惑,但是我不能100%确定什么时候应该使一个函数成为类的成员函数,什么时候离开它作为一个正常的函数,其中其他源文件可以在函数声明在头文件中公开时调用函数。所需的函数成员变量的访问与大多数时候的决定有关吗?提前感谢。
I keep on getting confused about this design decision a lot of the time when I'm writing programs, but I'm not 100% sure when I should make a function to be a member function of a class, when to leave it as a normal function in which other source files can call the function when the function declaration is exposed in a header file. Does the desired access to member variables of a function have to do with the decision most of the time? Thanks in advance.
推荐答案
The Interface Principle by Herb Sutter
The Interface Principle by Herb Sutter
对于类X,所有函数,包括自由函数,都是
(a)提及X和
b)提供X
在逻辑上是X的一部分,因为它们构成X的接口的一部分。
有关深入讨论,请阅读Herb Sutter的命名空间和界面原则。
For in depth discussion read Namespaces and the Interface Principle by Herb Sutter.
EDIT
实际上,如果你想了解C ++,阅读Herb Sutter写的一切:)
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