<taosx>
I forgot about merlin, I installed in my editor.
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<infinity0>
does anyone want €15-30k (probably more towards the latter) for a side-project over 6 months. i know it's not a lot, it's govt/public funding, but if so you can pm me
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<taosx>
@infinity0 what would be some basic requirements?
<taosx>
infinity0: what would be some basic requirements?
<infinity0>
the most basic one being that you're comfortable figuring out stuff by yourself
<infinity0>
and can read code and properly understand it precisely, rather than in a very vague way which is not real understanding
<taosx>
I think I check the first requirement, not so sure about the second.
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<cranmax>
Hi, I'm trying to install re2 in CentOS 7 via opam, my opam switch is 4.04.0 , but it promtps an error:
<cranmax>
I do the opam depext correctly, but I can't install the package re2. So I may install ocaml via centos or there is a solution via opam like downgrading ocaml to a previous version?
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<Leonidas>
cranmax: which package does it try to install?
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<cranmax>
Leonidas: I want to install in ocaml 4.04 via opam: async_graphics, core_bench, core_extended and re2 that is required by core_extended
<Leonidas>
cranmax: no, I mean which dependencies does it want to install through yum/dnf?
<cranmax>
Leonidas: I think it depends on m4 but I have installed it; maybe its gcc via yum that is not installed although actually it does'nt prompt any dependencies. So i will try to install gcc in centos later and post what happens
<Leonidas>
cranmax: do you have g++?
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<cranmax>
Leonidas: I have installed g++ doing sudo yum install gcc-c++ and I have installed core_bench, core_extended and re2 but async_graphics 0.5.1 prompts an error saying that failed at "./install.sh"
<Leonidas>
cranmax: re2 has nothing to do with async or async_graphics, why are you building that?
<cranmax>
Leonidas: Because it was a dependencie of core_extended
<Leonidas>
cranmax: re2 only needs core_kernel
<Leonidas>
or does something else pull that in? :(
<cranmax>
Leonidas: I don't know what you want to say me... Now I want to install async_graphics via opam
<Leonidas>
cranmax: I though you tried to install re?
<Leonidas>
13:34 < cranmax> Hi, I'm trying to install re2 in CentOS 7 via opam
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<cranmax>
Leonidas: yes I have installed it
<Leonidas>
nice, glad we could solve your problem :)
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<whirm>
Hi everyone, I'm attempting to write a small utility to learn Ocaml and I got stuck trying to add a new dependency to my project. I've created a new project with carcass and written some ocaml code that reads a file from disk and writes it back. Now I want to parse some json with jsonm. The package is installed via opam, but I can't figure out how to add the dependency so the compiler finds it when running "topkg build".
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<Drup>
whirm: that's not covered in topkg's documentation ?
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<whirm>
Drup: If it is I could not find it
<Drup>
I'm not sure how topkg does things, but as far as *building* is concerned, it's ocamlbuild's job, so you just add `true: package(foo)` is your `_tags` file.
<whirm>
This seems to have worked. Thanks!
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<whirm>
Are there any plans towards having a more cohesive toolkit for Ocaml? a la "cargo" for rust or "go" for golang? I've tried to start some small project in Ocaml several times and I always end up frustrated or running out of time because of issues with the tooling around the language and so much non programming language related that one needs to learn/setup/figure out before being able to compile anything more complicated than a "hello
<whirm>
world"
<tane>
whirm, have a look at oasis
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<whirm>
tane: I tried oasis before and I ran into other issues (can't remember exactly what as it was a few months ago already)
<tane>
oasis + opam works fine, at least for me
<abeaumont>
topkg + opam also works fine
<whirm>
but things like having to figure out that you need to add the same dependency to _tags, opam and .merlin is suboptimal at best...
<whirm>
hey abeaumont! :)
<reynir>
o/ abeaumont
<abeaumont>
hey whirm, ltns :)
<abeaumont>
hey reynir !
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<abeaumont>
whirm: yes, it's probably not as easy as using cargo/go but the gap is becoming smaller
<whirm>
Thanks again guys! I'm calling it a day. I'll continue tomorrow
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<vmonteco>
Hello ! I don't get the error I'm getting while trying to make a recursive table type and init function >>> https://dpaste.de/KnxP <<< . Could someone help me to understand this please? :)
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<vmonteco>
Nevermind! I got it. :) I forgot the type name defined with injections.
<vmonteco>
By the way, with type t = Foo of int | Bar of string, what are Foo and Bar?
<vmonteco>
How should I call it?
<Drup>
vmonteco: constructors
<vmonteco>
Drup: Foo and Bar are constructors? Is it the same thing that a type?
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<lapinot>
hi, suppose i have a classical HOAS representation using GADTs, i also have an 'a tp type encoding the types of terms (TInt : int tp, TFun : 'a tp * 'b tp -> ('a -> 'b) tp, ...). Is it possible to write a function get_type : 'a expr -> 'a tp? I tried that one hard but i can't see any way to tackle it
<lapinot>
maybe using a fancy construct around type ('a, 'b) eq = Refl : ('a, 'a) eq but i can't see it
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<lapinot>
vmonteco: constructors are used in "sum" (aka "union") types, you can think of it as the counterpart to tuples which are product types. constructor are used to distinguish in which case of the union we are in (t is either an int, we will call that Foo or a string which we will mark as Bar)
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<lyxia>
it seems tricky indeed because in the case of a Lambda of ('a expr -> 'b expr) you somehow need to pass a 'a expr
<lyxia>
but this type isn't necessarily inhabited
<lapinot>
yeah, the path of doing some kind of dummy evaluation seems blocked by the fact that i would need to generate a dummy expr for any type
<lapinot>
also the weird part is that an expr can have a polymorphic type, something that i don't have now in `tp` .. i could add TAny : 'a tp but this solution is a bit weird because for example the identity has not type TFun (TAny, TAny) as this would encode (forall a. a -> forall b. b)
<Drup>
lapinot: are your functions represented by OCaml functions ?
<lapinot>
Drup: sadly yes, no destruction is possible
<Drup>
that's the issue :)
<Drup>
If you get rid of that, you should have no issues
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<lapinot>
maybe sidestepping a bit that question, is there a classical way to represent polymorphism to my `tp` type?
<lapinot>
s/to/in/
<Drup>
depends what you want to do with your polymorphism
<lapinot>
for example being able to express any type of the form `forall 'a. <some type using 'a and base types>`
<Drup>
In the case of your implementation, as far as I can see, polymorphism is actually completely implemented by OCaml
<Drup>
your language doesn't know about it
<Drup>
so, in a way, polymorphism doesn't exist in the language
<Drup>
if you start really wanting polymorphism implemented in the language *and* reflected by the type index, it's going to get a bit tricky (polymorphism is not first class in OCaml)
<lapinot>
are you referring to the fact that we can't have some "forall" anywhere in a type?