On 5/15/2016 11:45 AM, Ola Fosheim Grøstad wrote:
On Sunday, 15 May 2016 at 18:35:15 UTC, Walter Bright wrote:
On 5/15/2016 1:33 AM, Ola Fosheim Grøstad wrote:
That is _very_ bad.
Oh, rubbish. Did you know that (x+y)+z is not equal to x+(y+z) in floating
point math? FP math is simply not the math you learned in high school. You'll
have nothing but grief with it if you insist it must be the same.
Err... these kind of problems only applies to D.
Nope. They occur with every floating point implementation in every programming
language. FP math does not adhere to associative identities.
http://www.walkingrandomly.com/?p=5380
http://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html
Ironically, the identity is more likely to hold with D's extended precision for
intermediate values than with other languages.
