[英]Refactoring : delegate friendship in sub-functions
I refactor a code where a class has a friend function doing a lot of stuff.我重构了一个代码,其中 class 有一个朋友 function 做了很多事情。
class Foo
{
friend void do_something(Foo& foo);
};
void do_something(Foo& foo)
{
// More than 2000 lines of ugly code
}
I would like to split the content of do_something
in several small functions.我想将
do_something
的内容拆分成几个小函数。 Something looking like this:看起来像这样的东西:
void do_something(Foo& foo)
{
if(case_1) do_1(foo);
else if(case_2) do_2(foo);
else if(case_3) do_3(foo);
//...
}
Is there a design where I can transfert the friendship to the sub-fuctions do_x(Foo&)
without having to declare them in the class, or something similar in order to split the code?有没有一种设计可以将友谊转移到子功能
do_x(Foo&)
而不必在 class 或类似的东西中声明它们来拆分代码?
Note: C++11 only注:仅限C++11
Note: I don't want to write the sub-functions as maccros注意:我不想把子函数写成宏
Instead of having do_something
as function calling other sub-functions, I would suggest you to create an analogous class DoSomehting
.我建议您创建一个类似的 class
DoSomehting
,而不是将do_something
作为 function 调用其他子函数。
Then you could declare this class as a friend with friend class DoSomehting;
然后你可以将这个 class 声明为
friend class DoSomehting;
. . So these sub-functions could be its private methods.
所以这些子函数可以是它的私有方法。 The method to call -- could be a public method named eg like
void DoSomehting::process(Foo& foo)
:调用的方法 -- 可以是一个名为
void DoSomehting::process(Foo& foo)
的公共方法:
class Foo
{
friend class DoSomething;
};
class DoSomething
{
public:
void process(Foo& foo)
{
if(case_1) do_1(foo);
else if(case_2) do_2(foo);
else if(case_3) do_3(foo);
//...
}
private:
void do_1(Foo& foo);
void do_2(Foo& foo);
void do_3(Foo& foo);
};
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