ppx_deriving
reason
ppx_deriving | reason | |
---|---|---|
7 | 44 | |
441 | 10,056 | |
0.5% | 0.1% | |
7.0 | 5.8 | |
12 days ago | 2 months ago | |
OCaml | OCaml | |
MIT License | MIT License |
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ppx_deriving
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My Thoughts on OCaml
> You gave a beautiful answer about programming language
You do the same thing as in Rust, Scala or Haskell and derive the printer [1]. Then at the callsite, if you know the type then you do `T.show` to print it or `T.eq`. If you don't know the type, then you pass it in at the top level as a module and then do `T.show` or `T.eq`.
> Or to convert one type into another type?
If you want to convert a type, then you have a type that you want to convert from such as foo and bar, then you do `Foo.to_bar value`.
We can keep going, but you can get the point.
You _can't_ judge a language by doing what you want to do with one language in another. If I judge Rust by writing recursive data structures and complaining about performance and verbosity that's not particularly fair correct? I can't say that Dart is terrible for desktop because I can't use chrome developer tools on its canvas output and ignore it's hot-reloading server. I can't say Common Lisp code is unreadable because I don't have type annotations and ignore the REPL for introspection.
[1] https://github.com/ocaml-ppx/ppx_deriving
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Is rust serde unique?
Ocaml has the amazing ppx_deriving which can be used for serialization / deserialization in various formats.
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Question on type declaration syntax
I wrote a CLI tool and I'd like to produce statically linked binaries of my tool. However, I cannot do this because I'm using the ppx_deriving deriving preprocessor, and I cannot produce a statically linked executable while using this package.
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OCaml at First Glance
Not great, not terrible; the language supports annotations which mean nothing to the compiler but which pre-processors can take advantage of, and there is a framework called ppx which you can use to write your own preprocessor. There exist many pre-processors to do things like add inline tests, generate getter/setter/pretty-printing functions, and so on. Here is an example:
https://github.com/ocaml-ppx/ppx_deriving
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Bad documentation of Jane Street libraries
is from https://github.com/ocaml-ppx/ppx_deriving
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Recommended method for pretty-printing collections in Core?
Have you tried to derive a print function using https://github.com/ocaml-ppx/ppx_deriving
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How do I define ordering for my sum types?
However, there is a ppx (a pre-processor) which can do the job : ppx_deriving. You just have to anotate your type in oder to get the compare function automatically generated :
reason
- Learning Elm by porting a medium-sized web front end from React (2019)
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Melange for React devs book, alpha release
Hey HN, at Ahrefs we have been working on an online book that hopefully helps React developers get up and running with Melange, an OCaml to JavaScript compiler. You can read more about Melange here: https://melange.re/.
There are still a few chapters that we'd like to add before considering it "complete", but it might be already helpful for some folks out there, that's why we decided to publish it early.
The book uses Reason syntax to implement React components using ReasonReact components. You can read more about both in:
https://reasonml.github.io/
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ReScript: Rust like features for JavaScript
ReScript is "Fast, Simple, Fully Typed JavaScript from the Future". What that means is that ReScript has a lightning fast compiler, an easy to learn JS like syntax, strong static types, with amazing features like pattern matching and variant types. Until 2020 it was called "BuckleScript" and is closely related to ReasonML.
- Ask HN: Interest in a Rust-Inspired Language Compiling to JavaScript?
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Earning the privilege to work on unoriginal problems
This tracks with how I've seen "normal" languages converge on similar, flawed imitations of better type systems through tools and repurposed syntax. Thank you for confirming.
Do you have any recommendations or warnings regarding general languages which reach in the opposite direction? Reason[1] and F#[2] are both examples: they attach pre-existing ecosystems and compile-for-$PLATFORM tools to OCaml-like typing.
OCaml itself is also intriguing for personal projects. However, I'm worried the "GPL" in its standard library's LGPL license might scare people despite both the linking exception and Jane Street's MIT alternative.
1. https://reasonml.github.io/
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Melange 1.0: Compile OCaml / ReasonML to JavaScript
ReasonML purely as a syntax layer on top of OCaml is still being updated and released[1]. Incidentally, I'm one of the maintainers of that project too :-)
With this Melange release, we're hoping to somewhat revive ReasonML and channel some folks back to the community from the perspective of a vertically integrated platform that has seen major investment in the past few years.
[1]: https://github.com/reasonml/reason
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VN Compiler. Why using Fable is too difficult. (Pt. 1)
Why not use https://reasonml.github.io/ instead? Or just use Typescript?
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My Thoughts on OCaml
Quieted down, but I depend on projects with worst graphs:
https://github.com/reasonml/reason/graphs/contributors
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why
There is also reasonml for Web development.
- Por que Elm é uma linguagem tão deliciosa?
What are some alternatives?
deriving-show-simple
purescript - A strongly-typed language that compiles to JavaScript
ppx_jane - Standard Jane Street ppx rewriters
rescript-compiler - The compiler for ReScript.
ppx_sexp_conv - Generation of S-expression conversion functions from type definitions
melange - A mixture of tooling combined to produce JavaScript from OCaml & Reason
json-serde - Example of usage antlr4 and shapeless
js_of_ocaml - Compiler from OCaml to Javascript.
generic-data - Generic data types in Haskell, utilities for GHC.Generics
ocamlformat - Auto-formatter for OCaml code
goderive - Derives and generates mundane golang functions that you do not want to maintain yourself
refterm - Reference monospace terminal renderer