adrien changed the topic of #ocaml to: Discussions about the OCaml programming language | http://caml.inria.fr/ | OCaml 4.00.1 http://bit.ly/UHeZyT | http://www.ocaml-lang.org | Public logs at http://tunes.org/~nef/logs/ocaml/
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<areece> does anyone know why $ opam list camlidl woudl work but not $ ocamlfind query camlidl
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<areece> oh, because camlidl is a binary
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<testcocoon> I'm actually trying to load a lib as printer in ocamldebug. I'm using 'load_printer lld.cma'
<testcocoon> lld.cma contains a small ocaml code and a c code.
<testcocoon> when I try to load it I receive: The external function `lld_debug_value' is not available
<testcocoon> lld_debug_value is define in the C code that should be packed into lld.cma.
<testcocoon> Dos anybody know how to handle this?
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<noj> I'm using ocamlbuild to try and build a new top-level (ocamlbuild foo.top) with a foo.mltop file containing my module name 'Foo', but I can't use any of the definitions in my foo.ml file from the generated foo.top. What am I doing wrong?
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<noj> ok, #directory "_build" / ./top -I _build was the missing piece
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<mk270> any ocaml.org folks here?
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<beginner42> is it possible to pass more than one module to a functor?
<hcarty> beginner42: Yes - module Make(M1)(M2) = ...
<hcarty> beginner42: Sorry... you need module types attached to M1 and M2 IIRC
<hcarty> beginner42: module Make(M1 : S1)(M2 : S2) = ...
<beginner42> hcarty: is the syntax then functor(P : T1) (P2 : T2) ... -> struct end ?
<hcarty> beginner42: You can use the syntax I wrote directly or expand it that way
<beginner42> hcarty: ok, thank you
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<hcarty> benja: The expansion would be: module Make = functor (M1 : S1) -> functor (M2 : S2) -> struct ... end
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<testcocoon> does anybody know how I can create a opam package that can be configured (I want to have a package that can be build for release and debug mode)
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<hcarty> testcocoon: You could set an environment variable and check it during the configuration of your package
<hcarty> testcocoon: I'm not sure if opam provides something directly for that though.
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<testcocoon> hcarty: how to you check a envisonment variable in the opam file. the build field seams to be only a static table of command lines
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<hcarty> testcocoon: Not in opam - in the the configure/myocamlbuild.ml/OMakefile of the source
<hcarty> testcocoon: Section 4 in that document makes it look like you can set per-package variables at the opam level. I'm not sure how to use the values, but the information you need may be there.
* testcocoon was not aware of the manual
<testcocoon> hcarty: OK, it seams that I can read the variable %{$NAME:$VAR}%, but how can I set it?
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<testcocoon> Is there a way to tell opam to keep the build directory? make uninstall does not work if configure and make is not executed....
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<Leonidas> hmm, when I install batteries from OPAM, shouldn't open BatArg;; work in the ocaml toplevel?
<asmanur> did you load batteries inside the toplevel ?
<asmanur> (#use "topfind" ;; and #require "batteries" ;;)
<Leonidas> asmanur: well, I know batteries *used* to do this automatically
<Leonidas> did this change in 1.5?
<thelema> Leonidas: batteries includes a battop.ml file that should automatically be installed.
<thelema> It also includes a .ocamlinit chunk that needs to be put in your ~/.ocamlinit to run the battop.ml when you start the toplevel
<thelema> this has not changed in 1.5
<Leonidas> thelema: odd. If I run .opam/4.00.1/lib/batteries/ocaml I get the toplevel with the batteries ascii art
<Leonidas> thelema: I just took the ocamlinit from github and put it in ~/.ocamlinit but I get an error
<Leonidas> okay, wait a second
<Leonidas> okay, when I copy over .ocamlinit, it works
<Leonidas> Error: I/O error: /usr/share/doc/ocaml-batteries/toplevel.help: No such file or directory
<Leonidas> well, yeah, that path is does not exist
<Leonidas> (#help;;)
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<thelema> hmm, I am tempted to take a look at that, but I'm pretty sure we're dropping the builtin help in 2.0, as it's quite unmaintained
<thelema> yes, the builtin docs need a DOCROOT environment variable to be set before building
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<thelema> this could be added to the OPAM script
<thelema> (I think)
<wmeyer> hi
* wmeyer is starting another weekend
<thelema> hi wmeyer
<adrien> wmeyer: aren't you tired of weekends? you could do some more work like, for instance, something completely at random, cross-compilation support
<wmeyer> hahaha
<wmeyer> i prefer disorganised, compulsive, and chaotic, distributed style of development, I am sure cross-compilation will fit in :-)
<adrien> it definitely will so start right now!
<wmeyer> will have a look now, thx, salted peanuts on the table.
<wmeyer> adrien: so yypkg is all the time on your plate? :-)
<adrien> I want to make a new release :P
<wmeyer> definitely it's a good idea
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<Leonidas> thelema: does it respect the DOCROOT variable?
<thelema> Leonidas: at compile time
<Leonidas> but yeah, if it is going to be dropped, probably not worth the work
<thelema> Unless someone is interested in making it work well... I don't use it
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<Leonidas> hmm, if only opam description files were documented... :)
<Leonidas> oh, they are
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<adrien> wmeyer: thanks for looking; so far I've almost only touched the build system since it seems it's where most of the work is and the other things can only be properly done once the build system "works"
<adrien> I'll comment more on tomorrow; I'm going to bed right now
<adrien> good night
<wmeyer> adrien: night
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<troydm> can i have the same function with the same name but different argument types and number of arguments
<troydm> like in Haskell?
<Asmadeus> the last declaration would overwrite earlier ones afaik
<troydm> ic
<Asmadeus> on the other hand you can use optional arguments
<Asmadeus> if it's got the same name, it's probably the same thing with default values
<troydm> ic, thx
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<fab> hi
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<fab> i don't understand a type declaration maybe you can help me
<fab> type env = Env of (ide -> dval);;
<fab> i don't understand what that means
<fab> ide and dval are type already declared
<fab> but i don't undertand "( x -> y)"
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<fab> very helpful
<pippijn> fab: ocaml 4?
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<pippijn> actually I think this is just a function type
<pippijn> x -> y means function taking x and returning y
<nickmeharry> Hi, I'm new to OCaml, and I'm trying to figure out the module system. Given a class c, what do I need to do to access it like MyLib.Module.c? Coming from a Python background, I expected something like MyLib/module.ml containing the class, but that doesn't seem to be working.
<pippijn> nickmeharry: the ocaml module namespace is mostly flat
<pippijn> MyLib/module.ml will normally compile to a module named Module
<Qrntz> troydm, OCaml doesn't support overloading yet, but you could have polytypic behavior using GADTs for runtime type representations
<nickmeharry> Interesting. So how should I best avoid namespace clashes?
<pippijn> you can make a MyLib module with the -for-pack compiler option
<Qrntz> although it'd be probably easier to just write multiple functions
<troydm> Qrntz: ic
<troydm> thx
<nickmeharry> Ok, I'll rethink my design then.
<fab> Env is a type?
<pippijn> Env is a type constructor
<pippijn> env is the type
<fab> ok Env is the custructor
<fab> but it works as a function?
<pippijn> similar, yes
<pippijn> it is just like a function, except it cannot be curried
<fab> i really have problems using it
<fab> is there any guide on this type of topic?
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<fab> i give a look, thanks for now
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