opCmp with template type not working.

[Dominikus Dittes Scherkl]

On Tuesday, 3 November 2020 at 03:07:14 UTC, user1234 wrote:

> opCmp should return a signed integer.
No. opCmp should return a float, to have all 4 possible 
comparison results available:
greater (1)
lower (-1)
equal (0) and
not comparable (NaN)

Especially the last one is necessary if you like to have opCmp 
defined on some not completely ordered set.