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July 28, 2015 11:00Subject:

Re: Views on changing Math-BigInt OO designMessage ID:

20150728110020.27229.qmail@lists-nntp.develooper.comOn 07/28/2015 04:39 AM, Peter John Acklam wrote: > I want to change the OO design of the Math-BigInt distribution, but before > I do so, I would like your opinion. > > Current implementation: > > Currently, Math::BigInt is the superclass of Math::BigFloat, which in turn > is the superclass of Math::BigRat. This OO design doesn't make sense. None > of Math::BigInt, Math::BigFloat, and Math::BigRat have an internal > structure which is a superset/subset of any of the others. Methods like > band(), bor() etc. make sense on Math::BigInt objects, but don't make sense > on Math::BigFloat objects and Math::BigRat objects, who inherits the > methods band(), bor() etc. > > TELS, who introduced this design, seemed to be aware of the problems, and > as a sort of workaround let Math::BigFloat->isa("Math::BigInt") return > false. Ditto for Math::BigRat. This doesn't solve the real problems and > causes problems (e.g., endless recursion) when creating subclasses. > > New implementation: > > I want to introduce Math::BigNum as a virtual parent class, and let > Math::BigInt, Math::BigFloat, and Math::BigRat be subclasses of > Math::BigNum. Math::BigNum will implement the very few methods that > Math::BigInt, Math::BigFloat, and Math::BigRat have in common as well as > some internal utility functions. > > Would this be OK? > This sounds worth exploring. If I understand you correctly, the end user's interface would not change. > Regards, > Peter John Acklam > (current maintainer of Math-BigInt, Math-BigRat, and bignum) >Thread Previous | Thread Next

- Views on changing Math-BigInt OO design by Peter John Acklam
- Re: Views on changing Math-BigInt OO design by Zefram
- Re: Views on changing Math-BigInt OO design by Shlomi Fish
**Re: Views on changing Math-BigInt OO design**by James E Keenan- Re: Views on changing Math-BigInt OO design by Peter John Acklam
- Re: Views on changing Math-BigInt OO design by Abigail
- Re: Views on changing Math-BigInt OO design by David Bundgaard
- Re: Views on changing Math-BigInt OO design by Abigail
- Re: Views on changing Math-BigInt OO design by Peter John Acklam
- Re: Views on changing Math-BigInt OO design by Aristotle Pagaltzis
- Re: Views on changing Math-BigInt OO design by John Peacock
- Re: Views on changing Math-BigInt OO design by Peter John Acklam
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