Re: proposal: a width specification for s specifier (format function), fix behave when positional and ordered placeholders are used

Pavel,

* Pavel Stehule (pavel(dot)stehule(at)gmail(dot)com) wrote:
> I found one issue - if I disallow mixing positional and ordered style
> I break compatibility with previous implementation.

Can you elaborate? In the previous example, an error was returned when
mixing (not a terribly good one, but still an error). Returning a
better error won't be a problem.

> so maybe third way is better - use fix from my patch - a behave is
> same like in glibc - and raise warning (instead errors) when mixing
> styles is detected - we can replace warnings by errors in future.
>
> What do you think?

If there are cases which work today then I agree that we should issue a
warning to avoid breaking existing applications. We should still use
the glibc format when adding width support, however.

Thanks,

Stephen