[cfe-dev] Why is CharacterLiteral::getValue() unsigned?

[Chris Lattner]

On Feb 16, 2009, at 6:44 AM, Roberto Bagnara wrote:

>
> Am I misreading the C99 standard, 6.4.4.4#10, where it
> says "An integer character constant has type int"?
> Thanks,

The type of the literal and the type of getValue() are not necessarily  
tied.  This just means that the value zero extends when you ask for  
it.  If you cast it back to char, you can get whatever you want.

To answer your specific question, the reason for this is that clang  
supports the "multibyte char" extension, which looks like 'abcd'.  Yes  
this is a horrible thing. :)

-Chris