Re: REAL with generics constraint

> Arnaud Payement wrote:
> 
> >  
> >
> >  I am using eiffel to write a VECTOR class with operation
like dot and 
> > cross products and I need to get the norm of the vector.
Therefore, I 
> > am using the sqrt methods of the REAL type. However, I
want to use my 
> > class with REAL_32 or REAL_64 etc ... I use generics with
constraint 
> > but REAL_64 and REAL_32 doesn't have a root class with the
sqrt 
> > methods !!!!!! How can I do that ? I am new to Eiffel, so
my question 
> > is perhaps a stupid one. My code :
> >

You can't. There is no way to implement such generic class. I
sent several emails about this with an example class
POINT[T->NUMERIC]. What you have to do is define two classes
VECTOR_REAL_64 and VECTOR_REAL_32 with their own 'normalize'
method.

> Have you looked at REAL_GENERAL.  I don't know what the
current state of 
> play is.

Unfortunately, no :-( 'xxx_GENERAL' classes are dummy classes
and can't be used in SmartEiffel code.



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