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Show HN: Self-hosted stack-based programming language

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Re: Show HN: Self-hosted stack-based programming language

#21

Post by couchand »

Drahflow wrote: post #15
jdmichal wrote: post #8

I find the differing syntax between function and variable storage to be interesting. Is there any particular reason these aren't unified? Assuming anything in brackets is a first-class "function" object, something like this should be possible: 2 /two define { two add } /addTwo define

The storage is exactly the same, the difference is only in what will happen if the name is encountered somewhere. { 2 } /putTwoOnStack deff { 2 } /putClosureOnStack defv putTwoOnStack dump # 2 putClosureOnStack dump # putClosureOnStack * dump # 2

I'm not convinced the distinction is valuable. Since you already have * and {} you don't really need two distinct variable types.

Re: Show HN: Self-hosted stack-based programming language

#22

Post by Drahflow »

couchand wrote: post #21
Drahflow wrote: post #15

Earlier quoted context omitted.

The storage is exactly the same, the difference is only in what will happen if the name is encountered somewhere. { 2 } /putTwoOnStack deff { 2 } /putClosureOnStack defv putTwoOnStack dump # 2 putClosureOnStack dump # putClosureOnStack * dump # 2

I'm not convinced the distinction is valuable. Since you already have * and {} you don't really need two distinct variable types.

I think it's a good thing (tm) that { x sin } could be valid code with x pushing the value of x whereas sin is executing the value of sin.

Theoretically speaking, I need at least the deff and defq distinction, otherwise { } could not be invoked during "parse" time. The defv case could in principle be removed, but as * needs to execute (otherwise nothing ever will), execution would need to be the default or I would need to decide based on dynamic type. The first option would mean a lot of superfluous {} (or | actually) around normal data variables, the second one would destroy the nice similarities between arrays, strings and functions with integer domains.

Re: Show HN: Self-hosted stack-based programming language

#24

Post by Drahflow »

jetpm wrote: post #23

Can I do this with strings as well? "tsch" ==pa pa dump # "tsch"

;) Yes. It works exactly as you envisioned it. You can do it with pretty much everything, actually:

  |dump =*clap
  [ "pa" |dump /tsch  0.0 ] ==slow slow clap
  # [
  #   "pa"
  #   
  #   "tsch"
  #   
  #   +0.0e0
  # ]
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