undefined | Better HN

0 pointsjabl5y ago0 comments

> Fortran predictably overflows the result

Not sure what you mean here, and I don't have the standard at hand ATM, but I'm quite sure this is undefined behaviour in Fortran.

But yes, I agree defined behaviour is good. Undefined behaviour is occasionally good for optimization, at the cost of gray hairs for users.

0 comments

milancurcic5y ago

Standard? True, undefined. Compilers, however, happily overflow unless you tell them to catch it at run time. So, my original statement is at least half false. :)

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0 pointsjabl5y ago0 comments

> Fortran predictably overflows the result

Not sure what you mean here, and I don't have the standard at hand ATM, but I'm quite sure this is undefined behaviour in Fortran.

But yes, I agree defined behaviour is good. Undefined behaviour is occasionally good for optimization, at the cost of gray hairs for users.

0 comments

milancurcic5y ago

Standard? True, undefined. Compilers, however, happily overflow unless you tell them to catch it at run time. So, my original statement is at least half false. :)

j / k navigate · click thread line to collapse