consider whether [cinttypes.syn] is in the right place

<cinttypes> is a weird header. It contains abs and div for intmax_t, plus some primitive string <-> integer conversion functions. And some printf / scanf format string macros. And we put it in the iostreams portion of the standard.

Is this really best?

We once kept all the formatting and parsing stuff within [input.output], but now we have [charconv], and somewhere near there seems like a much better fit for the primitive formatting and parsing functions in .

The integer div / abs functionality seems to belong in [numerics].

The format string macros seem to belong near [cstdio.syn], which is where the header currently is.

And maybe we could "compromise" and put the header in [cstdint].

So: I'm not sure what's best, but we should talk about it some more, especially given that the advent of [charconv] significantly weakens the argument for the current home.

Read [cinttypes.syn] alongside [charconv], [numerics], [cstdio.syn], and [cstdint], then review its current placement within [input.output]. Done means reaching and documenting a consensus on the organization of the header's facilities and updating the relevant standard structure accordingly.