A strange div bug on Linux x86_64, (both dmd & ldc2): long -5000 / size_t 2 = 9223372036854773308
mw
mingwu at gmail.com
Mon Aug 17 17:06:55 UTC 2020
On Monday, 17 August 2020 at 11:11:22 UTC, Andrei Alexandrescu
wrote:
> On 8/13/20 6:13 AM, FeepingCreature wrote:
>> Changing integer promotion rules to disallow promotion of
>> signed to unsigned for division will not cause massive silent
>> breakage. - But it will cause massive visible breakage; Phobos
>> uses this all over.
>
> I wonder if such a change would uncover any bugs in phobos.
...
On Monday, 17 August 2020 at 11:24:08 UTC, Andrei Alexandrescu
wrote:
> On 8/14/20 5:29 PM, Walter Bright wrote:
>> On 8/14/2020 6:32 AM, Adam D. Ruppe wrote:
>>> just I don't care, I want 16 bit operations here.
>>
>> The design considerations are mutually incompatible:
>>
>> 1. performance
...
>> 14. should work like Python
>
> Heh, this looks like a list of things CheckedInt is supposed to
> help with.
That's why I did this study: use checkedint as a drop-in
replacement of native long
https://forum.dlang.org/thread/omskttpjhwmmhifymiha@forum.dlang.org
and logged this bug:
https://issues.dlang.org/show_bug.cgi?id=21169
If we can have these enhancements fixed faster, we will be able
to quickly test the replacement in any library (even better with
a compiler command line option to activate the switch).
More information about the Digitalmars-d
mailing list