cloture
immer
cloture | immer | |
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8 | 25 | |
371 | 2,425 | |
- | - | |
4.5 | 6.2 | |
7 months ago | 6 days ago | |
Common Lisp | C++ | |
- | Boost Software License 1.0 |
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cloture
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Trouble defining a Lisp-1 DSL in Common Lisp
For reference, and to show that it's possible, you might be interested in how I did this for Cloture (Clojure in CL): https://github.com/ruricolist/cloture/blob/master/clojure/core.lisp
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The Jank Language: LLVM Hosted Clojure
Why not use something like https://github.com/ruricolist/cloture (a Clojure "adapter" that runs on Common Lisp) if you want that?
- Cloture – Implementation of Clojure in Common Lisp
- ClojureRS – Clojure interpreter implemented in Rust
- Clojure – Differences with Other Lisps
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Clojure, but without the JVM?
Clojure on Common Lisp: https://github.com/ruricolist/cloture
- Seeking clojure-styled concurrency operators for common lisp
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On Repl-Driven Programming
It does not offer the full experience. It has no breakloop and no ability to browse and edit the live running environment. It has no ability to rummage around inside the dynamic environment of a suspended function call, much less to redefine the suspended function or the types of its parameters, nor to restart the suspended call. Indeed, the JVM makes some of that stuff really inconvenient to do.
You cannot do everything from the Clojure repl in the way you can from a Common Lisp repl or from a Smalltalk worksheet.
I don't know that the Clojure language design forbids it; you might, for example, implement Clojure on top of a Lisp or Smalltalk environment and hook up their tools to Clojure through its interop. That might work, and ruricolist has been working on such an implementation called Cloture:
https://github.com/ruricolist/cloture
But existing Clojure implementations don't have the full set of tools.
immer
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Text Editor Data Structures: Rethinking Undo
I've been working on an editor (not text) in C++ and pretty early got into undo/redo. I went down the route of doIt/undoIt for commands but that quickly got old. There was both the extra work needed to implement undo separately for every operation, but also the nagging feeling that the undo operation for some operation wasn't implemented correctly.
In the end, I switched to representing the entire document state using persistent data structures (using the immer library). This vastly simplified things and implementing undo/redo becomes absolutely trivial when using persistent data structures. It's probably not something that is suitable for all domains, but worth checking out.
https://github.com/arximboldi/immer
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Show HN: A hash array-mapped trie implementation in C
How does this compare to https://github.com/arximboldi/immer (other than the C/C++ difference)?
Also, it's my understanding that, in practice, persistent data structures require a garbage collector in order to handle deallocation when used in a general-purpose way. How does your implementation handle that?
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Text Editor Data Structures
You might be interested in ewig and immer by Juan Pedro Bolivar Puente:
https://github.com/arximboldi/ewig
https://github.com/arximboldi/immer
See the author instantly opening a ~1GB text file with async loading, paging through, copying/pasting, and undoing/redoing in their prototype “ewig” text editor about 27 minutes into their talk here:
https://m.youtube.com/watch?v=sPhpelUfu8Q
It’s backed by a “vector of vectors” data structure called a relaxed radix balanced tree:
https://infoscience.epfl.ch/record/169879/files/RMTrees.pdf
That original paper has seen lots of attention and attempts at performance improvements, such as:
https://hypirion.com/musings/thesis
https://github.com/hyPiRion/c-rrb
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value semantics and spans/views
You’re absolutely right, however people have been putting in the “extra efforts” required for efficiency. Check out immer if you’re interested.
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How to synchronize access to application data in multithreaded asio?
The C++ immer library: https://github.com/arximboldi/immer
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Purely Functional Data Structure by Chris Okasaki [pdf]
For C++ check this one out - https://github.com/arximboldi/immer
- Persistent and immutable data structures written in C++14
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Introducing B++ Trees, a C++ B+ Tree library
Yeah I agree that I should link that wikipedia page in the docs, I'll do that as soon as I get a chance. immer (https://github.com/arximboldi/immer) also links that page in its docs, for the exact same reason I'm sure. Interestingly, there is a lot of overlap between persistent data structures in the functional programming sense and persistent data structures in the persisted-to-disk sense because persistent data structures in the FP sense are one of the best ways to guarantee atomic updates and safe failure recovery in a persisted-to-disk system! Btrfs and ZFS, as well as many databases, are at their core basically just copy-on-write B+ trees.
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What are some architectural patterns for creating a game editor.
I’ve never tried it, but I love the idea of implementing editor scene state using immutable data structures like https://github.com/arximboldi/immer With that, every edit would append a new node to a list of scene states. Undo/redo becomes iterating your view of the scene up and down through that list. Can’t screw up an undo function if there’s never any work to do :P
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TypeScript Without Side Effects
I have! I think it's related to the C++ immer library which I used several years ago in Vortex. It's kinda like the previous generation of ValueScript. 🍻
What are some alternatives?
janet - A dynamic language and bytecode vm
babashka - Native, fast starting Clojure interpreter for scripting
clojerl - Clojure for the Erlang VM (unofficial)
clj-kondo - Static analyzer and linter for Clojure code that sparks joy
clj-chrome-devtools - Clojure API for controlling a Chrome DevTools remote
graalvm-clojure - This project contains a set of "hello world" projects to verify which Clojure libraries do actually compile and produce native images under GraalVM.
etaoin - Pure Clojure Webdriver protocol implementation
ewig - The eternal text editor — Didactic Ersatz Emacs to show immutable data-structures and the single-atom architecture
planck - Stand-alone ClojureScript REPL
deprecated-coalton-prototype - Coalton is (supposed to be) a dialect of ML embedded in Common Lisp.
ClojureRS - Clojure, implemented atop Rust (unofficial)
awesome-modern-cpp - A collection of resources on modern C++