Signedness of wchar_t and wint_t leads to problems with gcc -Wsign-conversion

[Andreas Schwab]

On Nov 21 2016, "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> wrote:

> So, I'm not quite clear on the point that you are making in your
> second point. Given code such as:
>
>     wchar_t w;
>     ...
>     if (iswlower((wint_t) w) ....
>
> Do you mean that the standards are saying that casting to wint_t here
> is guaranteed to be correct? I can't see the line of reasoning that
> leads there.

Any valid value of wchar_t is representable by wint_t.  I cannot find
any more convincing argument.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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