Slava Pestov <sl...@factorcode.org> wrote: > You're forgetting that Ed also invented the cleave combinators, which > have significantly cleaned up pure stack code, and eliminated many of > the cases where one would otherwise need locals.
Yes, that's significant. Then there's also the "looking a gift horse in the mouth" problem. In general, I don't think there's a problem with accepting locals-using definitions; I also don't think we should be promoting them as good Factor style per se (although of course we should have style rules that FUEL can follow for when they are used). In addition to welcoming any Factor code, we (historically) definitely welcome rewrites of locals-using Factor code. Such rewrites test and demonstrate Factor's expressiveness. > Indeed, the Factor standard library (core and basis) is written in an > almost exclusively concatenative style. A few words here and there use > locals. Right now a few hundred words in core and basis use locals > (out of more than 10,000) and this seems to be a good balance. It's notable (in a good sense) that this situation has steadily improved over time. > My preferences are as follows, from best to worst: > - Clean stack code with cleave combinators and the occasional simple > shuffle word like dup, over, drop, or swap > - Code that uses locals > - Code that uses complex shuffles like rot, -rot, pick, swapd Out of curiosity, what did you think of Nowak's "banana notation" (| |) for his spread-like combinator? (The major difference between spread and his combinator is that his combinator doesn't allow the quotations to access each other's results.) I found the notation interesting because it allows the person reading the code to clearly see the nature of the code up-front, rather than having to trace out where a quotation is being produced and consumed every time. > Slava -Wm ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Factor-talk mailing list Factor-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/factor-talk
