[HN Gopher] The Programming Language Zoo
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The Programming Language Zoo
Author : creata
Score : 111 points
Date : 2021-05-03 13:28 UTC (9 hours ago)
(HTM) web link (plzoo.andrej.com)
(TXT) w3m dump (plzoo.andrej.com)
| 0xDEEPFAC wrote:
| Could Ada++ be part of the Zoo? xD
| Jtsummers wrote:
| It's not a miniature language, nor is it a real language.
| 0xDEEPFAC wrote:
| Sounds like a pedantic distinction without a difference ; )
| Jtsummers wrote:
| Is it pedantic to point out that Ada++ is inconsistent with
| the objective of the site:
|
| > The Programming Languages Zoo is a collection of
| _miniature programming languages_ which demonstrates
| various concepts and techniques used in programming
| language design and implementation. It is a good starting
| point for those who would like to implement their own
| programming language, or just learn how it is done.
| [emphasis added]
|
| And I know you've posted about Ada++ a few times (I thought
| I recognized your name, you were the submitter the day
| after April Fool's Day), but Ada++ is still not a real
| language. At best it's a cosmetic (and poorly done)
| transformation of Ada itself. I mean, this is a code sample
| from the site: case Variable: when
| 0 => Put_Line ("Zero"); when 1 .. 9 =>
| Put_Line ("Positive Digit"); when 10 | 12 | 14 | 16
| | 18 => Put_Line ("Even Number between 10 and
| 18"); when others => Put_Line ("Something else");
| }
|
| Note the weird mismatch of the : as the starting delimiter
| for the block and } for the closing delimiter. Because
| literally `is` becomes `:` and `end` becomes `}`, and
| `begin` becomes `{`. Since `case` statements in Ada don't
| use `begin` but _do_ use `is` you end up with this gross
| translation.
| hardwaregeek wrote:
| Mini languages are so fun! I wrote an absurd language for my
| GraalVM internship application that's implemented in Ruby, Java
| and JavaScript. Quite absurd but a lot of fun:
| https://github.com/nicholaslyang/for-the-graal
| Jtsummers wrote:
| This is cool, and amusingly I wrote a simple calculator over the
| weekend (and will be adding variables this week when I get back
| to it) for a demo for work. minikanren or microkanren would be a
| good addition to this. There's already miniprolog so there's some
| overlap, but it's a well-defined language that's about the same
| size as some of these.
| slaymaker1907 wrote:
| I think there is still value in minikanren since it uses a
| different evaluation strategy than Prolog. While Prolog just
| has to support backtracking when things fail, minikanren
| requires much more interleaving of code paths.
|
| In terms of implementation, you can probably implement
| backtracking good enough for Prolog via backtracking, but you
| really need immutable maps for minikanren due to the
| interleaving. On the prolog side of things, prolog
| implementations typically care a lot more about being able to
| dynamically interact with the database including
| adding/retracing goals. Finally, minikanren tends to play nicer
| when combined with another language compared to prolog so it
| might be interesting to do include have it embedded in another
| language.
| qsort wrote:
| Some of them also have compilers to a simplified machine object
| code. This is seriously amazing. I doubt I'll get anything else
| done for the rest of the day :D
| franga2000 wrote:
| The primary (?) author of this site (Andrej Bauer) is a professor
| at the University of Ljubljana. I'm currently in his Principles
| of Programming Languages course and I have to say, it is the one
| and only "theoretical" CS subject that I've really enjoyed!
|
| Old recordings of his other classes are also the only thing that
| helped me actually understand proofs of program correctness last
| semester. Seriously, I went through all our lectures and basic
| materials twice and still didn't get it. Then someone sent me one
| of his recordings and in 30 minutes, it all just clicked for me.
| Ended up getting 100% on that part of the exam, where before I
| wasn't sure I'd even pass.
| whitten wrote:
| I'm not expecting anyone to actually already have this done, but
| I would like to suggest that with the toy languages that a walk
| through of how to set up a language server protocol for the
| language would be rather helpful, and educational. This page
| claims to be a good starting point
| https://microsoft.github.io/language-server-protocol/
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(page generated 2021-05-03 23:01 UTC)