Decimal string to floating point conversion with correct half-to-even rounding
noone at nowhere.com
Tue Jul 7 23:56:45 UTC 2020
On Tuesday, 7 July 2020 at 23:52:05 UTC, 9il wrote:
> On Tuesday, 7 July 2020 at 16:38:39 UTC, kinke wrote:
>> So wouldn't the trivial 'fix' be using `strtod` for double
>> literals and `strtof` for floats? [For LDC, we wouldn't rely
>> on the host C runtime or a mir implementation, but use LLVM
>> facilities anyway.]
> This should work if the C runtime handles the values correctly.
I've just opened a PR for DMD (and LDC too):
> Does this actually mean DMD wouldn't be able to compile itself
> with DigigtalMars C runtime?
Sorry, I don't understand. - I think this excess precision was at
some point considered a feature (but probably only for D, not for
DigitalMars C), there's even a test making sure 0.9L and 0.9 are
parsed to the same compile-time value.
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