adrien changed the topic of #ocaml to: Discussions about the OCaml programming language | http://www.ocaml.org | Current MOOC: https://huit.re/ocamlmooc | OCaml 4.04.0 release notes: http://ocaml.org/releases/4.04.html | Try OCaml in your browser: http://try.ocamlpro.com | Public channel logs at http://irclog.whitequark.org/ocaml
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<KV> Hi! I've some confusion about the "function" keyword in Ocaml, I wonder if someone could help me understand. I've a program that depends on a lot of regex matching, I don't want to compile all the regex string on every function call. I've found this very neat example where you can (if I understand the syntax correcly) evaluate constants at declaration in the function scope, instead of on every run: http://pastebin.com/aPu66Bdh
<KV> BUT the manual says that the "function" keyword should be followed by a pattern-matching, which is not true (?) for that example
<Drup> it is, "n -> ... " is a valid pattern matching :)
<KV> Oh, that's true :) But is there any point of using function instead of fun in that case?
<Drup> Not in this case, no
<KV> Thanks! that solved my confusion
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<nullx002> Hi
<nullx002> i am using ocaml+emacs+opam in org-mode
<nullx002> with babel code
<nullx002> .org files are exporting to .pdf but not to .html
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<alexmarkley> hey all; i'm trying to track down a showstopping bug in an program (Unison) which is written in ocaml
<alexmarkley> unison started segfaulting on me when i upgraded my system to fedora 25
<alexmarkley> in my troubleshooting, i have re-built multiple versions of unison multiple times
<alexmarkley> and most recently, i removed the fedora-provided ocaml packages from my system and manually compiled the latest release of ocaml
<alexmarkley> the latest backtrace shows a lot more information than previous backtraces did, and it appears to be segfaulting inside the ocaml garbage collector
<alexmarkley> backtrace for reference: http://pastebin.com/SiTyXV2Z
<alexmarkley> is it possible that i have found a bug in the ocaml garbage collector?
<alexmarkley> if so, how should i approach tracking this down and solving it?
<Drup> it's quite unlikely, but I think you should send that on the OCaml and unisson mailing lists
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<alexmarkley> Drup: would the ocaml mailing list be preferable to the bug tracker?
<alexmarkley> i know every open source project is different
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<Drup> alexmarkley: unison people probably read the mailing list but not the bugtracker :)
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<alexmarkley> Drup: are you familiar with the unison project?
<Drup> nope
<alexmarkley> i also submitted bug reports against the unison issue queue on their github project page
<alexmarkley> it's not a very active project, unfortunately
<alexmarkley> that is why i am working so hard to track this down myself
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<alexmarkley> what worries me about this issue is that i previously had no issues with the stable versions of these packages
<alexmarkley> ocaml 4.02 and unison 2.48.4
<alexmarkley> the problem started when i moved to fedora 25
<alexmarkley> so i am wondering if this is some kind of exotic problem like a compiler bug or some-such
<alexmarkley> i was kind of hoping that an ocaml expert might be able to direct me on how to tweak the GCC flags when ocaml is being bootstrapped
<alexmarkley> like perhaps turning off compiler optimizations would "magically" make the problem go away
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<jlouis> seliopou: oh, FYI, I dumped some results in the mirage-cohttp thread for you to work with
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<iyy> struggling to learn lwt and i'm trying to get an socket connection to wait for success so i can return the file descriptor. "Lwt_unix.connect fd addr >>= fun () -> fd" then fails saying that the "fd" part ought be "'a Lwt.t". clues?
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<aantron> iyy: try "Lwt.return fd"
<aantron> you could also change the >>= to >|=
<aantron> however the better way is to write "let%lwt () = Lwt_unix.connect fd addr in Lwt.return fd", and use package lwt.ppx
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<iyy> thanks, i think that's the way to go. i think i'm doing things the way they aren't meant... refactoring
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<flux> ?
<Drup> it migrated to github
<flux> oh
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<vbmithr> Drup: good that such things makes you happy :D
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<vramana> I am unable to build this https://github.com/realworldocaml/examples/blob/master/code/ffi/build_qsort.sh example under OCaml 4.04. Error: Unbound value Array.element_type is the error that I am getting.
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