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

2013/2/9 Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com>:
>> 2013/1/31 Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>:
>>> I am sending rewritten code
>
> Nice. I think this will be very useful, and it looks like it now
> supports everything that printf() does for %s format specifiers, and
> it's good that %I and %L behave the same. Also the code is looking
> cleaner.
>
>>> It indirect width "*" and "*n$" is supported. It needs little bit more code.
>>>
>>> There are a new question
>>>
>>> what should be result of
>>>
>>> format(">>%2$*1$s<<", NULL, "hello")
>>>
>>> ???
>
> My first thought is that a NULL width should be treated the same as no
> width at all (equivalent to width=0), rather than raising an
> exception.
>
>> minor update - fix align NULL for %L
>
> You need to do the same for a NULL value with %s, which currently
> produces an empty string regardless of the width.

have others same opinion? Usually I don't like hide NULLs, but this is
corner case (and specific function) and I have not strong opinion on
this issue.

>
> The documentation also needs to be updated. I'm thinking perhaps
> format() should now have its own separate sub-section in the manual,
> rather than trying to cram it's docs into a single table row. I can
> help with the docs if you like.

please, if you can, write it. I am sure, so you do it significantly
better than me.

Thank you

Pavel

>
> Regards,
> Dean