Floating point types default to NaN?
Ola Fosheim Grøstad
ola.fosheim.grostad+dlang at gmail.com
Sat Nov 25 09:49:22 UTC 2017
On Friday, 24 November 2017 at 22:38:49 UTC, Jonathan M Davis
wrote:
> That requires data flow analysis, which the compiler doesn't do
> a lot of, because it can be complicated.
If dataflow is sufficient then it isn't all that complicated, you
can implement generic dataflow using Monotone Frameworks:
http://symbolaris.com/course/Compilers11/27-monframework.pdf
But on the other hand, data flow might not be sufficient for what
you want to do.
> And NaN math is something that's built into CPU. Operations
> other than default initialization can result in a floating
> point value being NaN.
If you have turned on exceptions for signalling-NaNs then it
makes sense. It doesn't make all that much sense for quiet NaNs.
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