Re: C11: should we use char32_t for unicode code points?

This patch looks good to me overall, it's a nice improvement in clarity.

On 26.10.25 20:43, Jeff Davis wrote:
> +/*
> + * char16_t and char32_t
> + *      Unicode code points.
> + */
> +#ifndef __cplusplus
> +#ifdef HAVE_UCHAR_H
> +#include <uchar.h>
> +#ifndef __STDC_UTF_16__
> +#error "char16_t must use UTF-16 encoding"
> +#endif
> +#ifndef __STDC_UTF_32__
> +#error "char32_t must use UTF-32 encoding"
> +#endif
> +#else
> +typedef uint16_t char16_t;
> +typedef uint32_t char32_t;
> +#endif
> +#endif

This could be improved a bit. The reason for some of these conditionals 
is not clear.  Like, what does __cplusplus have to do with this?  I 
think it would be more correct to write a configure/meson check for the 
actual types rather than depend indirectly on a header check.

The checks for __STDC_UTF_16__ and __STDC_UTF_32__ can be removed, as 
was discussed elsewhere, since we don't use any standard library 
functions that make use of these facts, and the need goes away with C23 
anyway.