Poly/ML

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polyml Digest, Vol 110, Issue 3
by dtopham＠gmail.com 10 Dec '14

10 Dec '14

Thanks for your reply Richard, I will look into using CInterface. That makes me think that another approach could be to use an imperative language for the GUI and link in the ML functions! That way existing GUI builders could be used. I will experiment. I scannned through your work on wrapping SDL and find it interesting. Since I am new to ML could you supply a short demo of how one would integrate those into a complete example? (I think SDL is supplied with TinyCore, so I will test it there). I noticed when loading the Motif library in PolyML (the use command), that the screen would display each function as it is loaded. Do you know if there is a way to create a standalone app that does not bombard the user with that kind of loading info? e.g. When you start up your SDL game, does it scroll through screens of info before game starts? -Dave On Tue, Dec 9, 2014 at 4:00 AM, <polyml-request at inf.ed.ac.uk> wrote: > Send polyml mailing list submissions to > polyml at inf.ed.ac.uk > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.inf.ed.ac.uk/mailman/listinfo/polyml > or, via email, send a message with subject or body 'help' to > polyml-request at inf.ed.ac.uk > > You can reach the person managing the list at > polyml-owner at inf.ed.ac.uk > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of polyml digest..." > > > Today's Topics: > > 1. Poly/ML (David Topham) > 2. Re: Poly/ML (Richard Molitor) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 8 Dec 2014 18:03:27 +0000 (UTC) > From: David Topham <dtopham at gmail.com> > To: polyml at inf.ed.ac.uk > Subject: [polyml] Poly/ML > Message-ID: <loom.20141208T185725-199 at post.gmane.org> > Content-Type: text/plain; charset=us-ascii > > I just discovered PolyML while looking for a distribution of Standard ML > that I > could compile from source on TinyCore Linux. It worked perfectly (unike > SMLNJ > e.g.). > > I am interested in connecting GUI to ML as well as functions written in > C/C++ and all that seems like it would work (form reading the > documentation). My > question is this: > The doc for using PolyML Motif is 14 years old and one posting from > David > Matthews in this forum mentioned that Motif is no longer maintained, so I > wonder > if that was a project that is no longer worth learning. > > Is there a better way to mix GUI with PolyML? > > (I have been using FLTK with C++ with very good success so > far, but want to add in the ability to mix in functional (SML) programming. > > Any suggestions would be appreciated! > > > > ------------------------------ > > Message: 2 > Date: Tue, 9 Dec 2014 00:02:24 +0100 (CET) > From: Richard Molitor <gattschardo at googlemail.com> > To: polyml at inf.ed.ac.uk > Subject: Re: [polyml] Poly/ML > Message-ID: <alpine.LNX.2.03.1412090000160.5655 at localdomain.local> > Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed > > Hello David, > > On Mon, 8 Dec 2014, David Topham wrote: > > > I am interested in connecting GUI to ML as well as functions written in > > C/C++ and all that seems like it would work (form reading the > documentation). > > [...] > > Is there a better way to mix GUI with PolyML? > > I myself picked up PolyML recently and I'm liking the small distribution. > Unfortunately that means it doesn't comes with "batteries included", as > they > say. > > > Any suggestions would be appreciated! > > What I found is that wrapping C libraries using the interface documented at > http://polyml.org/docs/CInterface.html is rather simple - provided you > know C, > but from reading your mail that seems to be no issue. > > I didn't want a GUI library, but I wrapped parts of SDL2 for some simple > game > development, see > https://github.com/gattschardo/hashira/blob/master/sdl.sml > it's not a complete wrapper, just what I felt I needed myself. > Also I have a somewhat more complete wrapping for libjson at: > https://github.com/fkmsoft/fridge/blob/master/ml/json.ML > > So you might want to try just wrapping relevant parts of e.g. Gtk yourself > and > see how far you can get (don't know how wrapping C++ for getting Qt would > work) > > Cheers > Richard > > PS: if anybody is interested in using my WIP wrappers, I'd be happy to > polish > them a little and put them in proper repositories. > > > ------------------------------ > > _______________________________________________ > polyml mailing list > polyml at inf.ed.ac.uk > http://lists.inf.ed.ac.uk/mailman/listinfo/polyml > > End of polyml Digest, Vol 110, Issue 3 > ************************************** > > -- > The University of Edinburgh is a charitable body, registered in > Scotland, with registration number SC005336. > >

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polyc crash
by di.gama＠gmail.com 13 Oct '14

13 Oct '14

Hello, I'm trying to diagnose a problem with polyc. $ echo 'fun main() = TextIO.output(TextIO.stdOut,"Hello World");' > helloworld.sml $ polyc -o helloworld helloworld.sml Exception- SysErr ... raised This happens regardless of the program being compiled. I took a look at what polyc is doing, and so I ended up with the following: $ echo "use \"helloworld.sml\"; PolyML.export(\"helloworld\", main);" | poly -q --error-exit $ gcc -O3 -I../libffi/include helloworld.obj -o helloworld -L/usr/local/lib -lpolymain -lpolyml -lgdi32 -lwsock32 -lstdc++ -lgcc_s -lgcc /usr/lib/gcc/i686-pc-cygwin/4.8.3/../../../../i686-pc-cygwin/bin/ld: cannot find -lpolymain /usr/lib/gcc/i686-pc-cygwin/4.8.3/../../../../i686-pc-cygwin/bin/ld: cannot find -lpolyml collect2: error: ld returned 1 exit status I am running Windows with Cygwin. Was there a configuration I should have done that I missed? "poly" appears to work fine; the error occurs in gcc because the libraries weren't found. When I checked /usr/local/lib/ or /usr/lib/, I also could not find any libpolymain.a or libpolyml.a files. Shouldn't these have been created by the make script? Mario

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address type in Poly/ML interface to C (FFI)
by me＠beroal.in.ua 06 Oct '14

06 Oct '14

Hello. As I can see, there is no address type. The suggested conversion for C pointers (POINTER : vol Conversion) converts a C pointer to "vol". As follows from http://www.polyml.org/docs/CInterface.html#17%20Volatile%20Implementation , "vol" contains an address of a heap object. If its boolean field "owns" is true, it garbage-collects its heap object. If a C library requires that freeing a heap object be done explicitely, managing an address to that heap object by "vol" is inefficient and confusing. A "vol" value contains an index of the element of the "vols" array which contains an address of a memory block which contains an address of the heap object. What I really need is an ML integer type that is wide enough to hold a C pointer; I called it "address type". I'm trying to create a binding to the XCB library ( http://xcb.freedesktop.org/ ). Some functions from XCB don't manage memory (so the Poly/ML garbage collector may be used); some functions are allocating objects, and those objects must be freed by the function "free" or "xcb_disconnect".

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Isabelle/ML IDE (update)
by makarius＠sketis.net 03 Oct '14

03 Oct '14

On Thu, 2 Oct 2014, Tjark Weber wrote: > 1. I suspect that the ITP aspect of Isabelle may put off people who > just want to write SML code. (For instance, there are many documents > and panels visible in the UI that are entirely irrelevant to SML > programming.) If you had unlimited time, I would suggest that the SML > IDE be released separately from Isabelle. This is only the first release of the SML PIDE, but I have started thinking about these questions before. It is probably mainly a matter to re-package the system such that it looks more like an SML IDE outright. Many things are possible, but it also requires some work. Does anybody has smart ideas to find some funding for such projects? It might be also interesting for David Matthews himself, to provide even more IDE support at the bottom, e.g. inclusion of the debugger. We also need to find out how many people are still there to use SML. So far there are already 9 supporters on http://stackoverflow.com/questions/2036744/ml-ide-and-compiler-for-windows-… and the green tick has changed as well :-) > 2. The need to have a theory file (no matter how simple) is slightly > unfortunate. Would an Isabelle/jEdit option "-sml" (or similar) be > feasible to make the enclosing theory redundant, at least for > single-file SML projects? "Unfortunate" (like "fix") is a word of this odd street language that has emerged in recent years and is better ignored. The enclosing theory file is like a project file, but with slightly odd syntax for that purpose, although not too bad compared to the traditional "use" script. There might be other ways emerging to assemble ML files; or maybe just some IDE support to generate such templates. There was also a private discussion with Larry Paulson, to re-use the model of the SML/NJ compilation management, whatever that might be exactly -- we still need to find out. > 3. I noticed that "use" is not available, and that "print" doesn't > affect the output panel. A document that summarizes such differences > (and explains, e.g., how to perform I/O instead) might be useful. Note that "use" is not part of Standard ML. This touches again the question how SML projects are actually managed. For the IDE to work, the control over the ML files needs to be given to the IDE, not the ML program. Further note that "print" is also not Standard ML, although TextIO.print is covered by the Basis Library. That raw stateful output is in conflict with the stateless model of PIDE, but it works as specified: via stdout, which is shown in PIDE in the Raw Output panel. In contrast, the Documentation panel includes src/Tools/SML/Examples.thy with some examples to re-use stateless Isabelle output in SML. > 4. Ctrl+click on certain built-in operators, such as *, takes me to an > empty buffer called "Standard Basis". Surely some explanatory message > could be displayed in the buffer. This information is produced by Poly/ML at the very bottom. E.g. the "length" function refers to $ML_SOURCE/basis/List.sml as expected. David Matthews might be able to tell what happens with * (or +). I know myself from Isabelle/Pure bootstrapping, that formal references to very basic things are sometimes surprising, by construction of the initial environment. Makarius

3 4

Isabelle/ML IDE
by makarius＠sketis.net 29 Sep '14

29 Sep '14

Dear friends of Poly/ML, or Standard ML in general, Isabelle2013-2 is now available from the usual mirror sites: Cambridge (UK) http://www.cl.cam.ac.uk/research/hvg/Isabelle/ Munich (Germany) http://isabelle.in.tum.de/ Sydney (Australia) http://mirror.cse.unsw.edu.au/pub/isabelle/ It is mainly an environment for interactive and automated theorem proving, but the integration of Isabelle/ML into the Prover IDE makes it suitable for general Standard ML development (potentially in teaching scenarios). After downloading / unpacking / running the main application of Isabelle/jEdit, the Documentation panel on the right-hand side gives quick access to Examples, notably src/HOL/ex/ML.thy for some Isabelle/ML basics. The manual on Isabelle/jEdit in the same panel provides further details on the IDE, which is based on the jEdit text editor. Makarius

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regarding problem with PolyML debugging prompt
by sarojanarayana＠gmail.com 27 Sep '14

27 Sep '14

Hi, I am using PolyML in windows XP sp3 . I tried to run through example on how to use source level debugger, which is provided on you website .http://www.polyml.org/docs/Debugging.html I am able to open debugging prompt using open PolyML.Debug option. But I am unable to exit debug prompt. I tried control C option . But it is only interrupting compilation, without breakIn option as shown in your website. I set breakIn "f" option as mentioned. Please let me the solution. Thanks and regards Saroj

2 1

Motif in Poly/ML: sometimes works, sometimes not
by piotr.trojanek＠gmail.com 01 Sep '14

01 Sep '14

Dear Poly/ML experts, I copy-pasted Motif code from "Poly/ML for Motif: Quick Reference Manual", sections 1.3 and 1.4. When I start poly session and load this code with "use" I sometimes get a Motif window but sometimes do not. I am running polyml 5.5.2 on x86_64 Ubuntu, compiled with "--with-x --enable-shared" against Open Motif 2.3.4. Am I missing something? -- Regards, Piotr Trojanek

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Poly/ML Process Monitor
by tjark.weber＠it.uu.se 20 Aug '14

20 Aug '14

We would like to announce a first version of a graphical process monitoring application for Poly/ML. The monitor displays data regarding, e.g., CPU time, memory footprint, garbage collection and threads of running Poly/ML processes. It is available from https://bitbucket.org/tjark/poly-ml-monitor The monitor is currently available for Linux only. It was written by Magnus Stenqvist and me and relies on Poly/ML's statistics feature, which was implemented by David Matthews. Feedback is welcome. Best, Tjark

1 0

measuring memory usage
by u5028081＠anu.edu.au 18 Aug '14

18 Aug '14

Hi all, Is it possible to measure the memory usage involved in a particular function call from within PolyML 5.5.0? I'm trying to figure out how much memory my vote-counting function uses to count a variety of lists of votes. I'm randomly generating the vote lists, and the functions I'm using for generating the lists seem to use more memory than the count itself. I can't measure what I need with OS tools because they return the memory used to generate the vote lists (because it's larger). I'm not sure where to look for functions of this nature, or if they're even provided in PolyML. Any help appreciated. Thanks in advance, Tom

2 1

can't quit sessions
by u5028081＠anu.edu.au 31 Jul '14

31 Jul '14

Hi all, I'm using PolyML 5.5.0 to run some tests as a batch job and I can't figure out how to quit without using ^D (which I can't feed in automatically when batching things). I've tried using "PolyML.quit ();" and "PolyML.exit 0;" but neither of these work. I'm opening the PolyML structure first (open PolyML;) but I'm still getting errors saying that the commands haven't been declared. I can use some other functions defined in PolyML such as "PolyML.use", but not all (for instance "cd" isn't available). Seems the documentation is incorrect? http://www.polyml.org/docs/Intro1.html Can anyone help me out on this one? Thanks in advance, Tom

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