jemc changed the topic of #ponylang to: Welcome! Please check out our Code of Conduct => https://github.com/ponylang/ponyc/blob/master/CODE_OF_CONDUCT.md | Public IRC logs are available => http://irclog.whitequark.org/ponylang | Please consider participating in our mailing lists => https://pony.groups.io/g/pony
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<fluttershy_> hello, what's new in distributed pony. When do we get to play with it :) ?
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<Umang> while running MediaWiki.patch from commnad prompt
<Umang> on windows machine
<Umang> to patch up the ponydocs
<Umang> faicing below errors
<Umang> Hunk #1 FAILED at 147. 1 out of 1 hunk FAILED -- saving rejects to file LocalSettings.php.rej
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<Umang> if anyone can help me on this it would be great
<Umang> @SeanTAllen or anyone can help me
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<chatter29> hey guys
<chatter29> allah is doing
<chatter29> sun is not doing allah is doing
<chatter29> to accept Islam say that i bear witness that there is no deity worthy of worship except Allah and Muhammad peace be upon him is his slave and messenger
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<Wangg> I believe that ponylang should have an alternate backend so that it compiles faster
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<jemc> Wangg: can you elaborate?
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<Xyliton> As there are no structs in pony... Is there any way I could get every public field of a class?
<SeanTAllen> Xyliton: i'm a little confused by your statement. perhaps i dont understand how you use structs in c.
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<SeanTAllen> Xyliton: can you explain what the problem you are trying to solve is?
<Xyliton> I'm trying to write a more... "easy" to use json lib which let's you (de)serialize a class from/into json
<Xyliton> but I would have to be able to inspect said class
<Xyliton> I might achieve that by forcing every class I want to serialize to implement a `fields()` function which returns a map of all the fields it want's to serialize, and a constructor which takes a map it uses to construct a new instance
<SeanTAllen> and you want to do this at run time right Xyliton ?
<SeanTAllen> what would happen if the json doesnt have some of the fields in the class?
<Xyliton> it should throw an error, I think
<SeanTAllen> or if the field is "foo" and in json its a string but its a u32 in the pony class?
<SeanTAllen> there's no way in pure pony to do what you want at the moment as there is in no runtime class inspection
<Xyliton> hm...
<SeanTAllen> there's a request for an RFC
<SeanTAllen> but from a security standpoint, that is very very tricky
<Xyliton> security?
<SeanTAllen> yes
<SeanTAllen> introspection is a serious security concern
<SeanTAllen> one of my favorite tricks with java programmers is using the reflection api to change the value of their private fields
<Xyliton> oh, I see.
<Xyliton> But you can't just inject code after it's compiled, like in java, right?
<SeanTAllen> dont need to inject code to have fun with it
<SeanTAllen> so to do what you want, would require c code at this point
<Xyliton> hm... okay. Thanks anyway :)
<SeanTAllen> you might be able to do something with the annotations that Praetonus added. not sure.
<Xyliton> there are annotations now?
<Xyliton> are they documented anywhere?
<Praetonus> There is a tutorial section too: https://tutorial.ponylang.org/appendices/annotations.html
<Praetonus> The "Annotations in the Pony compiler" paragraph is outdated, there are several annotations implemented currently. We'll have to update
<SeanTAllen> which annotations have been implemented Praetonus ?
<Xyliton> It doesn't say how to use them from the view of a "backend" dev though. Just how to use implemented annotations
<Praetonus> `likely` and `unlikely` for branch prediction and `packed` for packed structures. I think that's all
<Xyliton> Where/how are they implemented?
<jemc> Xyliton: I've been meaning to work on a similar JSON library concept - (de)serializing classes directly, in a type safe way
<jemc> I think your best bet is to rely on code generation
<Xyliton> code generation? as in: macros?
<jemc> well, at the moment I mean having a program that can generate Pony source code for your serializable classes, from a description
<jemc> for example, in `pony-ast/static` I am generating complicated AST classes from these simple specs: https://github.com/jemc/pony-ast/blob/master/static/gen/ast_defs.pony
<jemc> I'm using them sort of like macros, except they're actually generating Pony source code in between
<jemc> here is the generated source code: https://github.com/jemc/pony-ast/blob/master/static/ast.pony
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<Xyliton> is it possible to pass around a type in pony?
<Xyliton> as in, use a type itself as argument for a function
<jemc> Xyliton: sort of, but probably not how you're hoping
<jemc> you can use type parameters, but they must all be resolved at compile time
<jemc> things like `Array[U8]`, for example
<Xyliton> My idea was to "build" a (de)serializer and you chain-call it with a key:type pair.
<Xyliton> once it's finalized it would have the types it needs to handle the serialization
<jemc> as of right now, I think the only way you can do so is with code generation
<Xyliton> hm...
<Xyliton> I don't think I'm good enough with pony for code gen yet
<SeanTAllen> its an interesting way to push the bounds of your knowledge
<jemc> I'm working on tools that will make code gen easier and more foolproof
<jemc> actually the `pony-ast` repo is a part of the basis for those tools
<Xyliton> I'm not even sure how a user should use a json lib which incorporates code gen
<Xyliton> do they generate models first and use them in their actual code?
<Xyliton> or would the codegen hide itself magically?
<jemc> Xyliton: same kind of workflow that capnproto & protobuf libs use
<Xyliton> I never worked with any of those
<jemc> you typically have a spec that you generate the code from, then check the generated code into version control alongside your hand-written source files
<jemc> so you only need to run the code gen process when you change the spec
<Xyliton> ohh
<SeanTAllen> which makes code generation the most awesome thing ever
<SeanTAllen> and also the worst thing ever
<SeanTAllen> its fun like that
<Xyliton> can I use pony-ast to generate code already?
<jemc> no, you can't use it to generate code from the AST level yet, but there is some utility code you can steal from that repo to facilitate outputing code line-by-line
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