The new class fraction

The new class fraction

[Mikael Djurfeldt]

2003-11-18  Marius Vollmer  <marius.vollmer@uni-dortmund.de>

	* objects.c (scm_class_fraction): New. 

It is great to have rational numbers in Guile's number tower.

However, why have you chosen the type name "fraction" rather than
"rational" as is the name used in for example Common Lisp?

I suggest quickly changing the name to <rational> before <fraction>
sticks.

M


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Re: The new class fraction

[Mikael Djurfeldt]

Mikael Djurfeldt <mdj@mit.edu> writes:

> 2003-11-18  Marius Vollmer  <marius.vollmer@uni-dortmund.de>
>
> 	* objects.c (scm_class_fraction): New. 
>
> It is great to have rational numbers in Guile's number tower.
>
> However, why have you chosen the type name "fraction" rather than
> "rational" as is the name used in for example Common Lisp?
>
> I suggest quickly changing the name to <rational> before <fraction>
> sticks.

Hmm... on second consideration.  Probably we should keep <fraction> as
the concrete class representing fractions and introduce the abstract
class <rational>, with subclasses <integer> and <fraction> so that
membership of class <rational> is equivalent to the result of a call
to the predicate rational?.

M


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Re: The new class fraction

[Matthias Koeppe]

Mikael Djurfeldt <mdj@mit.edu> writes:

> Mikael Djurfeldt <mdj@mit.edu> writes:
>
>> 2003-11-18  Marius Vollmer  <marius.vollmer@uni-dortmund.de>
>>
>> 	* objects.c (scm_class_fraction): New. 
>>
>> It is great to have rational numbers in Guile's number tower.
>>
>> However, why have you chosen the type name "fraction" rather than
>> "rational" as is the name used in for example Common Lisp?
>>
>> I suggest quickly changing the name to <rational> before <fraction>
>> sticks.
>
> Hmm... on second consideration.  Probably we should keep <fraction> as
> the concrete class representing fractions and introduce the abstract
> class <rational>, with subclasses <integer> and <fraction> so that
> membership of class <rational> is equivalent to the result of a call
> to the predicate rational?.

Actually, the name of the concrete class representing fractions is
called RATIO in Common Lisp.  It is a subclass of RATIONAL.

-- 
Matthias Koeppe -- http://www.math.uni-magdeburg.de/~mkoeppe


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