throw声明中的循环依赖 [英] Cyclic dependency in throw declaration

问题描述

我无法得到以下内容来编译

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解决方案

你不能从struct m声明中抛出一个m对象。此时，编译器不知道m对象是什么。比如，是否有默认构造函数，或者更多数据成员等。


因此它不知道要生成什么代码。也就是说，直到它到达结构声明的结尾。


你将需要抛出一个m *。


自编译器已经看过struct m，这是允许m *的足够信息。

嗨弱点，


感谢您的回复。我知道这个设计问题应该有一个简单的解决方法。你建议的解决方案非常简单，我只是抛出指向结构而不是实际对象的指针。


温馨的问候，

Gaura

对不起，伙计们。我实际上并没有尝试使用包含的更改来编译上面的代码。我们认为可行的改变是：抛出指向''struct m'的指针而不是抛出''struct m''本身的实例。更清楚我想说的是下面的代码

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Hi,

I am unable to get the following to compile

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解决方案

You cannot throw an m object from inside the struct m declaration. At this point the compiler does not know what an m object is exactly. Like, is there a default constructor, or maybe more data members, etc..

As a result it doesn''t know what code to generate. That is, not until it reaches the end of the struct declaration.

You will need to throw an m*.

Since the compiler has seen "struct m", that is enough information to allow an m*.

Hi weaknessforcats,

Thanks for your kind reply. I knew that there should be a simple workaround for this design problem. The solution that you suggested is very simple, I just throw a pointer to the struct instead of the actual object.

Warm Regards,
Gaura

Hi,

Sorry folks. I hadn''t actually tried compiling the above code with the change included. The change that we thought would work was: throwing a pointer to ''struct m'' rather than throwing an instance of ''struct m'' itself. To be more clear what I am trying to say is that the code below

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