Where is the function abs defined?

[ghost]

cmath.adept only has fabs and fabsf. But it seems I'm able to use abs with double value like on C++. If it's so, then where is the function abs defined?

[IsaacShelton]

You can define a function like this to get the same behavior as in C++.

func abs(value $T~__number__) $T = fabs(value as double) as $T

One currently does not exist in the standard library

[ghost]

I found where abs is defined. It's on 2.4/cmath.adept, not on sys/cmath.adept.