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<LACampbell>
'string Not_exposed_properly.Import.sexp_list' - I'm loving these new Base types :p
<companion_cube>
wat
<LACampbell>
companion_cube: it's what I get when I play with Jane Street Base in utop
<LACampbell>
I'm probably doing something wrong
<LACampbell>
I'll file an issue
<LACampbell>
hmm almsot certainly a utop issue actually. looks fine in merlin
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<LACampbell>
really weird. everything in utop has types like "sexp_list"
<companion_cube>
:D
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<zolk3ri>
yea, pervs
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<alicemaz>
hi all. I'm trying to build a very simple program with `ocamlbuild -package base main.native` and getting an error "No implementations provided for the following modules: Base__ referenced from main.cmx" that I'm not sure how to resolve. the program is just `open Base` and `let x = String.sub "hello world" 0 5`. I got ocaml and base from opam. this only happens when using some functions... for instance a
<alicemaz>
program with String.length compiles and runs fine, so my base works/links to at least some extent
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<alicemaz>
all I was able to find on google is that the error in general is usually caused by forgetting to include something but Base__ seems to be an internal submodule. I get a similar error when trying same with Core_kernel (Core itself has additional missing modules)
<LACampbell>
alicemaz: I got told to use jbuilder here the other day. works really well.
<SiGe>
I can run the program in interpreted mode with proper use/require statements, i.e., #use topfind;; #thread;; and #require core;;
<SiGe>
The command that I am using to run the program is: corebuild -log build.log -verbose 8 freq.byte
<octachron>
SiGe, this is in indirect issue, pin jbuilder to beta17: "opam pin jbuilder 1.0+beta17"
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<rgr[m]>
The other issue is to simply switch your project to jbuilder :)
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<SiGe>
octachron: Thanks. That didn't solve the problem - I had to tweak the command to: opam pin [add] jbuilder 1.0+beta17
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<SiGe>
rgr[m]: can you explain more? I am just following a book and was wondering how I can get corebuild to work.
<rgr[m]>
Hmm, so RWO still uses corebuild? That tool is basically deprecated. The dev version of RWO uses dune (formerly known as jbuilder). You can learn how to use it here http://dune.readthedocs.io/en/latest/
<rgr[m]>
You can still use corebuild if you want for now though. You will need to run octachron 's command
<SiGe>
Awesome! thanks. rgr[m] pining didn't help, it still gives me the same error, maybe I have to remove the build cache?
<octachron>
you need to rebuild core
<rgr[m]>
you should do $ opam reinstall core_kernel
<rgr[m]>
The reason why you need to do this is that dune is a "build" dependency. Hence it's dependents will be not be recompiled once jbuilder is reinstalled.
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<SiGe>
Ah, thanks a lot! That solved the problem, octachron and rgr[m]
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<remix2000>
I'm creating a program based upon a plugin architecture. I have a field that contains current state of the program. Each plugin can define its own state type. Other plugins can check this state, but it's not obligatory to handle states emitted by every plugin, and also no plugin can know all the states. Now, the question is: What should be the type of the `state`?
<octachron>
a list or map of extensible variant seems like a good match
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<malc_>
remix2000: string
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<remix2000>
octachron: What exactly do you mean? Could you show an example?
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<octachron>
remix2000, you can define "type data = .. "
<justin_smith>
err, mistag, that was for octachron ^
<octachron>
then each plugin can add its own constructor "type data += Plugin_1 of data"
<octachron>
then the program can have a list "type full_data = data list"
<octachron>
and a given plugin can retrieve the data it knows with "List.fold_left ( fun acc -> (function Plugin_1 data -> data :: acc | Plugin_2 -> … | _ -> acc) … "
<octachron>
justin_smith, I am not completely convinced that I need a link to the manual
<justin_smith>
octachron: it was a double reverse mistag
<pierpa_>
mismistag
<remix2000>
octachron, justin_smith: Thank you, that's an awesome feature! :D
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