3d vector struct

[bearophile]

Brenton:

> 1) I initialize the vector to a null vector, not nans

Why?


> 2) The dot and cross are "inout" methods, i.e. available for 
> mutable, const, and immutable objects.  There is no reason to 
> declare "inout" methods as being "const".

But I suggest to add pure/nothrow.


> 3) The dot and cross methods take an input "in" argument.  This 
> allows the compiler to choose between passing the parameter by 
> const value or const reference.

This is not true. In means "const scope", so it's always passed 
by value.

Bye,
bearophile