Re: [q-lang-users] Complex numbers

[Albert G. <Dr....@t-...>]

John Cowan wrote:
> And likewise "unparse (rat X Y) = '(X/Y)"?

Nope that won't work, because X:Int/Y:Int is a builtin which returns a 
floating point value. (No way to change this any more, this would just 
break too much existing code.) But Rob has a rational division operator 
'over' in his module, so unparsing to '(X over Y) would work in this case.

> [unparsing stuff...]
> Sounds excellent to me.  Of course, there would be the risk that
> whatever the pretty-printer produced would not in fact parse
> and evaluate to the same thing, but that's the price you pay
> for sharp tools.

O.k., I think I'll give it a go. (Actually I wanted to start writing a Q 
yacc in Q this week, but that can wait some more...)

-- 
Dr. Albert Gr"af
Dept. of Music-Informatics, University of Mainz, Germany
Email:  Dr....@t-..., ag...@mu...
WWW:    http://www.musikinformatik.uni-mainz.de/ag