On Friday, 14 October 2022 at 09:00:11 UTC, Patrick Schluter
wrote:
On Thursday, 13 October 2022 at 19:27:22 UTC, Steven
Schveighoffer wrote:
On 10/13/22 3:00 PM, Sergey wrote:
[...]
It doesn't look really that far off. You can't expect floating
point parsing to be exact, as floating point does not
perfectly represent decimal numbers, especially when you get
down to the least significant bits.
[...]
To me it looks like there is a conversion to `real` (80 bit
floats) somewhere in the D code and that the other languages
stay in `double` mode everywhere. Maybe forcing `double` by
disabling x87 on the D side would yield the same results as the
other languages?
Looking through the source code then for floating points we call
`parse!double` when parsing the json as a floating point.
I don't see real being used anywhere when parsing.
So if anything then it would have to be internally in parse or
dmd. I haven't checked either yet.
