Phobos math expert wanted: Please help porting std.conv.parse to 64bit reals

[Andrea Fontana]

On Tuesday, 19 November 2013 at 19:38:25 UTC, Johannes Pfau wrote:
> Am Tue, 19 Nov 2013 14:18:06 -0500
> schrieb Jerry <jlquinn at optonline.net>:
>
>> Johannes Pfau <nospam at example.com> writes:
>> 
>> > std.conv.parse!(real) and therefore also parse!double, 
>> > parse!float
>> > were written assuming real is always a 80 bit type. But on 
>> > most non
>> > x86 systems the largest floating point type is actually 
>> > double and
>> > therefore real is basically an alias for double. std.conv 
>> > makes some
>> > convenient assumptions for 80bit reals (like mantissa size 
>> > is ==
>> > long.sizeof). I guess this is a simple fix for math/floating 
>> > point
>> > experts but I'd need quite some time to fix it. So it'd be 
>> > great if
>> > someone could help and port std.conv.parse to systems with 
>> > 64 bit
>> > reals (real.mant_dig == 113) :-)
>> >
>> > https://github.com/D-Programming-Language/phobos/blob/master/std/conv.d#L2367
>> 
>> First step, please enter a bug so that the issue doesn't get 
>> lost.
>> 
>> I may be able to look at it a little tonight.  I'm not an 
>> expert, but
>> I have some experience with floating point conversion.
>> 
>> Jerry
>
> Hi,
>
> I didn't think someone would actually respond this after more 
> than a
> week :-)
>
> I actually ported that code in the meantime and I'll open a pull
> request for phobos soon. But it'd be awesome if you could help
> reviewing it once I opened the pull request.
>
> BTW: Don't worry, this issue won't get lost. The GDC port to 
> ARM is
> mostly finished and this is one of the last missing pieces so I 
> have a
> strong interest in making this work.

yay arm port!!