Re: Re: Conca : a small interpreter
<[email protected]> 01 May 2014 07:23:39 -0700
| Newsgroups | gmane.comp.lang.concatenative |
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| Message-ID | <[email protected]> |
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<p>Hello Claude, hello *,<br><br>the decision of Joy to allow definitions only at compile time may force development into a direction like term rewriting or something like that, I don't know.<br><br>What I think is: introducing a define-primitive is a door-opener into a scheme-like style of programming, maybe a bit more than scheme-style, a more natural way than scheme marcos.<br><br>Scheme and Joy both say: Programm == Data == List<br>So put something on stack, do all data-transformation you want until you get the definition you need and define.<br><br>I'm, like you, am one of those with an self made Joy implementation.<br>this is how my joy does it: <br><br>zip befor transformation:<br>zip: {l l -- l}<br> ( nil? &nb
sp; | nip<br> | nild? | zap<br> others | 2uncons pair^^ loop cons )dsplit cond*<br><br>and afterwards:<br>(zip) {l l -- l} (((nil? )(nip )(nild? )(zap )(else )(2uncons (pair )dip2 zip cons ))cond* ) define<br><br><br>about type checking at compile time:<br><br>Programming in Haskell or OCaml, when comming for scheme or lisp a cool experience: <br>when it runs it is correct.<br><br>But there are very successful languages without this property, as scheme/lisp or Python.<br><br>best regards<br>Heiko</p>
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