Printing floating points

[Afgdr]

On Thursday, 28 January 2021 at 23:27:28 UTC, Ola Fosheim Grøstad 
wrote:
> I do however refute the idea that an exhaustive test is needed, 
> since the problem involves regular patterns.

how about a full coverage of a half float type, assuming the 
function tested works the same with float and double and anay 
arbitrary lond FP type, e.g template param for mantissa and exp. 
Sof if a smaller FP type fully passes the for loop test, e.g all 
permutations we can assume bigger FP types will be 100% correctly 
converted.