Formatting -0.0 as 0.0
Steven Schveighoffer
schveiguy at gmail.com
Fri Oct 15 17:16:30 UTC 2021
On 10/15/21 11:18 AM, Bastiaan Veelo wrote:
> Thank you Steve.
>
> On Friday, 15 October 2021 at 14:09:32 UTC, Steven Schveighoffer wrote:
>> On 10/15/21 8:37 AM, Bastiaan Veelo wrote:
>>
>>> What I would like best is if there were a format specifier flag that
>>> does this conversion automatically, like "%> 4.3f". Does it make
>>> sense to add this? Is there a better way?
>>
>> The only way I can think of that isn't really intrusive (like your
>> `posZero` thing) is to define your own `writef`/`format` wrappers
>> (what I'd do is check any doubles, and replace them when necessary).
>
> The thing that is holding me back is that it feels backwards to wrap
> `std` to fix what I perceive as a usability issue, contra fixing `std`
> itself. Hence my proposal of extending the format specification --
> although I find it complicated enough as it is. I am surprised that I am
> the first to have this problem.
Well, it's based on C's implementation, so you are definitely not the
first ;)
https://stackoverflow.com/questions/9657993/how-to-convert-negative-zero-to-positive-zero-in-c
That also has a good suggestion instead of using * 0, you can check if
it's 0 and just assign 0 in that case.
-Steve
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