C++ 疯狂 typedef : what is the point of allowing this syntax by the Standard?

Question

老熟人:

typedef int cute_int; //cute : common and familiar syntax. 

这个语法很完美。没问题。

现在，当我们可以像上面那样编写 typedef 时，那么允许这种语法的意义何在:

int typedef crazy_int; //crazy : uncommon and unfamiliar syntax.

只是为了迷惑程序员？这种语法是否在任何地方都需要(实际上我们已经使用了前一种)？从编译器的角度你怎么看？他们觉得它可爱还是疯狂？还是对编译器根本不重要？

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顺便说一句，这段代码来自这里: Use of typename keyword with typedef and new

如果您想知道这是否是语法错误，请查看 the working code here在ideone。

Answer 1

"The flip side of this is that you have to deal with old mistakes and with compatibility problems. For example, I consider the C declarator syntax an experiment that failed. Nevertheless, I adopted it for C++. The alternatives and improvements I considered at the time would not have improved matters. I rate is as a minor problem. The more serious problem is to maintain closeness of language definitions as C evolves." - Bjarne Stroustrup