<bernardofpc>
Drup: in your module Solution, why does array n f get the () argument ?
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<Drup>
for better composition
<Drup>
each parser, once fully applied to it's argument, is a function unit -> 'a
<Drup>
you can write (array n (array k int))
<Drup>
and it's a parser for a matrice of size n*k
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<curiosity>
rgrinberg: just updated opam and the bug is gone
<rgrinberg>
curiosity: you mean opam update?
<curiosity>
yes
<rgrinberg>
curiosity: doesn't seem to be doing anything for me
<bernardofpc>
Drup: I see
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<rgrinberg>
curiosity: can you try building the packages i've linked in the bug report?
<curiosity>
rgrinberg: sure thing, one second
<curiosity>
have to install monomorphic thirst
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<curiosity>
obuild configure; obuild build; obuild install works fine
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<rgrinberg>
humm
<rgrinberg>
well that doesn't work for me :P
<rgrinberg>
could you add your datapoint to the ticket though
<rgrinberg>
and perhaps say how you "fixed" it on your end
<curiosity>
which obuild version do you have?
<rgrinberg>
master
<curiosity>
i have the 0.0.9 version installed
<curiosity>
i havent fixed anything, just made opam update and upgrade and i got this version
<rgrinberg>
oh wow 0.0.9 is kind of old
<rgrinberg>
i guess that's why it works :D
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<curiosity>
does that info help you?
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<struktured>
Drup: List.iter on line 555ish there's an array but he seems to mention some other array which is basically an optimized hashset over chars using an array of 255...
<Drup>
that's fine, it's rather efficient
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<Drup>
if you are doing access, not search, obviously
<struktured>
agreed, no issue w/that. except perhaps unicode problems or something.
<Drup>
sure
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<struktured>
somehow I have a non-localized parsing error with csv. yay
<struktured>
it seems to span multiple lines
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<munga>
hello, where can I find a recent version of ppx_ifdef compatible with the latest ppx_tools ? It looks like the ifdef in ocaml/experimental/frish is pretty outdated...
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<Drup>
just use cppo
<Drup>
it's a better solution for this problem anyway
<munga>
but ppx is part of the official ocaml distribution . cppo is yet another depedency ...
<Drup>
build time dependency
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<Drup>
you will have a dependency to ppx_ifdef anyway
<munga>
yes yes ... no objections ... I'm using camlp4 at the moment. anything will be a better build time dependency.
<Drup>
Also, you have opam now, haven't you ? cppo compiles and installs approximately instantly, it's not a problematic dependency
<munga>
well, I just need to compile the ifdef ppx extension at build time.
<munga>
ok. I'll check it out.
<munga>
but seems funny to have ppx in the official ocaml distrib and not use it ...
<munga>
and btw, here I'm trying to bootstrap opam itself, so less dependencies I add the better
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<Drup>
err.
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<Drup>
I have trouble understanding this mentality. To take the ppx example: ppx is >=4.02 only, your custom ppx will break at each ocaml release and introduce a maintenance cost. cppo on the opposite hand is well maintaned, works for all ocaml version, works faster, is more featureful and in the unlikely ocasion that it's broken, it's going to be fixed even before release.
<munga>
fair enough. you convinced me :)
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<munga>
about cppo ... is it possible to expand the name of the file currently examined ?
<munga>
camlp4macro has __FILE__ . I can't find how to do it with cppo
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<munga>
ignore my last question ... cppo has also __FILE__ support
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<dsheets>
anybody know how to get oasis to run tests with OCAMLRUNPARAM=b? Changing the _oasis test invocation or setting it during invocation don't work.
<dsheets>
hmm never mind, it seems to be OUnit's fault
<adrien_znc>
OCAMLRUNPARAM="b" <your_command>
<adrien_znc>
? :)
<Leonidas>
uhh, Damien Doligez works at Jane Street now?
<companion_cube>
as a guest, because his wife works in NYC
<companion_cube>
dsheets: you can also tune that from within OCaml, I think
<companion_cube>
Printexc.record_backtrace or something like this
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<Algebr>
Is this too far fetched, when I hit an exception, immediately put the program into a breakpoint.
<dsheets>
adrien_znc, yeah, ounit eats it
<dsheets>
companion_cube, tried this and failed...
<companion_cube>
oh ?
<dsheets>
i think ounit catches and eats it
<adrien_znc>
dsheets: ah, it sets OCAMLRUNPARAM to something else explicitely? =/
<companion_cube>
strange
<dsheets>
i think it catches everything and takes control of printing
<dsheets>
but i'm still tracking it down :-(
<dsheets>
so maybe i'm still wrong
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<companion_cube>
oh right, OUnit must catch exceptions indeed
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<Algebr>
How do you give the type for default arguments? ?(foo=`Bar) : Mod.some_type
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<octachron>
?(opt:type=val)
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<Algebr>
How can I extend polymorphic variants?
<flux>
extend?
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<flux>
ah, I see, in the type?
<companion_cube>
type bar = [`A | `B];; type foo = [ #bar | `C ];; I think
<companion_cube>
forget about the '#'
<Algebr>
yea, someone else defined type foo = [`a|`b] and I want to add `c
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<ggole>
You can't add it to foo: you can make another type with c, though
<ggole>
type bar = [foo | `c]
<Algebr>
why not, I thought polymorphic variants were open
<ggole>
They are structural, not open
<flux>
you can have a function that accepts 'anything'
<ggole>
You can define a type that is "some constructors or larger", if you like
<Algebr>
Then what is that type += stuff for
<ggole>
Oh, that's open types
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<ggole>
Polymorphic variants are a different thing
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<Jefffrey>
Did someone successfully installed OCaml on Mac OS X?
<Jefffrey>
Morning
<Algebr>
Jefffrey: I thnk that's fairly mundane, I'm using ocaml on os x.
<Jefffrey>
I can't for the love of me install it so that the graphics module, that should come with it, is actually installed
<Jefffrey>
I tried Macports, Homebrew, Macports and Homebrew
<Jefffrey>
Also Macports only for opam and then opam for ocaml
<Jefffrey>
Also Homebrew only for opam and then opam for ocaml
<Algebr>
if you want to use brew, brew gives command line flags
<Algebr>
and do brew info ocaml
<Algebr>
which gives the option of --with-x11
<Algebr>
which says "Install with the Graphics module"
<Jefffrey>
Oh dear lord I love you
<Jefffrey>
I mean, I love you Algebr, not dear lord
<Algebr>
lol
<Jefffrey>
Well, I love you too dear lord
<Jefffrey>
So I should reinstall with that flag?
<Algebr>
probably.
<flux>
the graphics library isn't very great, though, perhaps suitable for learning and debug graphics
<Jefffrey>
Yeah, it's for university
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<Drup>
the graphics library is fine for simple things
<Jefffrey_>
Ok, I did reinstall everything and now I get "Fatal error: cannot load shared library dllgraphics -- Reason: dlopen(dllgraphics.so, 138): image not found".
<Jefffrey_>
This is a nightmare.
<Drup>
you don't have x11 installed ?
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<Jefffrey_>
I get that error after I successfully compiled the program I'm trying to execute, and while running it.
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<Jefffrey_>
I installed XQuartz which was a dependency for installing ocaml with the --with-x11 flag
<Algebr>
Jeffrey: You need to make sure that x11 stuff can be easily found
<Jefffrey_>
How do I check that?
<Algebr>
Jefffrey_: Add this, or something appropriate for you, to your .bashrc/.zshrchttp://pastebin.com/LyMi5dfj
<Algebr>
Jefffrey_: Add this, or something appropriate for you, to your .bashrc/.zshrc http://pastebin.com/LyMi5dfj
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<Jefffrey_>
Did that, reloaded .bash_profile, recompiled and rerunned, same error
<Algebr>
did you just copy and paste the pastelink or did you check that your x11 install was actually at /opt/x11
<Jefffrey_>
I think I solved it.
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<Jefffrey_>
Let me restart 1 second.
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<Algebr>
you don't need to restart, just do exec bash or exec zsh
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<struk|work>
Drup: Bytes.unsafe_get cost me about 4 hours of debugging. I'm. Argh
<Drup>
didn't I told you not to use it ? :D
<Drup>
oh, maybe it wasn't you, I don't remember
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<Jefffrey>
Yup, I forgot to restart the computer after the Quartz installation.
<Jefffrey>
Now everything works fine.
<Jefffrey>
Thank you all very much.
<struk|work>
Drup: you told me to but it wasn't my original code so I didn't screw with it. I changed a suspicious block from unsafe to regular get and spotted the bug almost immediately
<Drup>
the line just above declare it, as a function parameter of insert
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<cmtptr>
what is it in this line: type 'a btree = Empty | Node of 'a * 'a btree * 'a btree
<Drup>
a type.
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<cmtptr>
so what specifies in the function definition that x of type 'a btree?
<Drup>
the namespace of types and the one of variables are separated
<cmtptr>
oh, x isn't
<cmtptr>
sorry
<cmtptr>
what specifies that the variable "btree" is of type 'a btree?
<Drup>
because you match it against the constructors Empty and Node
<Drup>
which are for the type btree
<cmtptr>
okay
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<cmtptr>
it's taking me so long to find time to actually sit down and look at this :(
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<Jefffrey>
I wonder. Why would one use classes as opposed to just a function that generates `object`s?
<Jefffrey>
They look like they have the same functionality.
<ggole>
You can't inherit from an object
<MercurialAlchemi>
Jefffrey: inheritance
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<Jefffrey>
You can only do inheritance with classes?
<Jefffrey>
Yeah, that makes sense.
<Jefffrey>
That's the only difference?
<Drup>
pretty much, yes
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<dmbaturin>
If objects could be polymorphic, you probably could emulate inheritance in a function that produces objects.
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<Drup>
I'm not sure what do you mean by polymorphic here
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<dmbaturin>
Drup: Well, "polymorphic" is probably not the right word. When you declare an object, there can't be any free type variables. However, I can imagine another approach where types of members are determined upon first use, like for references.
<dmbaturin>
It would be classes done badly, if, unlike references, the uninitialized object could be used multiple times and different uses were tracked independently.
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<Drup>
you can have free (type) variable
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<Drup>
let f x = object method bla = x end ;;
<Drup>
val f : 'a -> < bla : 'a >
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<dmbaturin>
Wait, but can you do it for values that aren't functions?
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<Drup>
let x = object val mutable x = None method get = x method set v = x <- v end ;;
<Drup>
val x : < get : '_a option; set : '_a option -> unit > = <obj>
<Drup>
it's appropriately monomorphic and all that :)
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<dmbaturin>
Drup: Well, true. But once it's known, it will stick to it forever. Or there is a way to copy the object when there are still unresolved type variables?
<Drup>
just generate it with a unit type.
<Drup>
let f()= ...
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<ggole>
If you want an object parameterized by a type variable, you can do that.
<ggole>
But I think you need classes for it.
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<Drup>
well, not really, I gave you objects parametrized by type variables
<Drup>
class types desugar to object types anyway
<nojb>
how often is the ocaml github mirror updated ?
<Drup>
automatically
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<Drup>
the delay is less than an hour I think
<nojb>
but there are some pull requests that have been merged yesterday that still don't show up (e.g. PR#111)
<thomasga1>
nojb: I think avsm needs to be around to run the scripts manually
<Drup>
oh O_o
<thomasga1>
or at least check that the scripts are not broken :-)
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<thomasga1>
(and he's in a plane currently)
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<nojb>
thomasga1: ah, ok, thanks! Also, sorry not yet ready with the revision of the config keys stuff - got sidetracked with other projects - am currently away from Cambridge but will try to get something out in the next few days
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<thomasga1>
no pb. We really need something like that soon though, so I'll merge even the simplest and not perfect version
<nojb>
thomasga1: understood. I'll look at it and get back soon.
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<aubergines>
I compile with ocamlfind ocamlc and I get the error:
<aubergines>
Error: Error on dynamically loaded library: dllz3ml.so: dllz3ml.so: cannot open shared object file: No such file or directory
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<nojb>
what is the complete command line ?
<adrien>
poke Drup, he loves z3
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<aubergines>
ocamlfind ocamlc -package batteries,Z3,cil -linkpkg -o main <bunch of cmo files>
<Drup>
No I don't :<
<aubergines>
I have dllz3ml.so in a directory that is included in the ld.conf file