alias question

Segher Boessenkool segher@kernel.crashing.org
Sat Feb 19 09:41:00 GMT 2011


>> But not every type aliases character type!
>
> What?  You can access any type with a char type,
> this is a specific exception.

Yes.  And you cannot access a char as any type.  The exception is
not symmetric in that way.

> Here's a concrete example.

> const short *w((short*)b);

That's not C code.  I have no idea about the rules in C++..

> char b[4] = {0,0,0,0};

If it was C, then the objects b[...] have declared type "char", so
you are only allowed to access it as a character type; anything
else results in  undefined behaviour.


Segher



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