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the use of “union” in all derived classes #1

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wangbw1116 opened this issue Mar 17, 2021 · 1 comment

wangbw1116 commented Mar 17, 2021

It's extremely awsome to realize all design pattern by C，but I'm wondering why there is a union type in each derived class，such as

struct _FindPwdMessage
{
	union
	{
		AbstractMessage;
		AbstractMessage abstractMessage;
	};
};

why it not been expressed like

struct _FindPwdMessage
{
	AbstractMessage abstractMessage;
};

The text was updated successfully, but these errors were encountered:

stringtrim commented Aug 4, 2021

I have the same question here.

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