Poly/ML

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698 discussions

[Fwd: Re: [polyml] Building Poly/ML on MacOS X 10.6]
by rda＠lemma-one.com 29 Dec '14

29 Dec '14

I wrote: > I am completely baffled. I thought I hada solved all my problems on > MacOS X > 10.6 and was just tidying up, when I had to recompile a 32 bit > version of > Poly/ML to test a tidied up make file. This failed because > PolyML.Compiler.printTypesWithStructureName no longer exists. The same > problem happened when i rebuild a 64 bit version. What has happened? but it was a false alarm: my make file was wrong for other reasons and the absence of PolyML.Compiler.printTypesWithStructureName was not relevant. No doubt there are good reasons why this variable has been withdrawn. Regards, Rob.

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ProofPower as an SML environment and IDE
by dtopham＠gmail.com 26 Dec '14

26 Dec '14

Omar, I recently installed ProofPower <http://www.lemma-one.com/ProofPower/index/index.html>and discovered that it has capabilities as an efficient and effective PolyML IDE too! It also uses a simplified variation of Knuth's "literate programming" idea where you can intersperse mathematics with the correct symbols (rather than ASCII code approximations). In an earlier post, I had mistakenly claimed that ProofPower required an earilier version of PolyML (v 4), but Rob Arthan helped me through the very minor update to a makefile to get it to build easily using the latest PolyML version, so that is not a problem. I have attached a small sample to show how the integration works with math using a few macros in the source code. The source (in the doc file) was entered using the xpp "IDE" which allows you to run the SML code right in the editor. -Dave Topham > 2. Re: [isabelle] Isabelle as an SML environment and IDE > (Omar Montano Rivas) > > ------------------------------ > Date: Mon, 22 Dec 2014 11:50:28 -0600 > From: Omar Montano Rivas <omarmrivas at gmail.com> > To: Aleks Kissinger <aleks0 at gmail.com> > Cc: isabelle-users at cl.cam.ac.uk, Poly/ML Mailing List > <polyml at inf.ed.ac.uk> > Subject: Re: [isabelle] Isabelle as an SML environment and IDE > > Really useful. Thanks for sharing. > > Best, > Omar. > > 2014-12-19 10:49 GMT-06:00 Aleks Kissinger <aleks0 at gmail.com>: > > > It recently came up on the Poly/ML mailing list that Isabelle/jEdit > > makes a pretty efficient SML IDE these days. I manage a fairly large > > SML project called Quantomatic, so I thought I'd have a go at getting > > a setup to work. I've got a setup now that I am pretty happy with, so > > I thought I'd share my results. Hopefully other people will find this > > helpful. > > > > Quantomatic is fairly unique in that it is designed to run inside of > > Isabelle or as a standalone project. As a result, the whole codebase > > is implemented on top of an Isabelle/ML-like environment, obtained by > > importing chunks of the ML code in Pure. This can be done by copying > > src/Pure from Isabelle 2014 into an SML project and using this file: > > > > > > > https://github.com/Quantomatic/quantomatic/blob/integration/core/isabelle_e… > > > > In the past, we used a slightly hacked-up version of Pure, but for the > > sake of maintainability, we now use an exact copy. > > > > The project itself is loaded with special "thy" files that only > > contain comments and "ML_file" commands. These can be run from inside > > Isabelle/jEdit (in the "real" Isabelle/ML environment), or they can be > > imported in poly/ML with the function "use_thy": > > > > > https://github.com/Quantomatic/quantomatic/blob/integration/core/use_thy.ML > > > > This implements a baby version of the outer syntax parser, which > > ignores imports and translates the ML_file commands into use > > statements. This makes the external ROOT.ML tiny and easy to maintain: > > > > https://github.com/Quantomatic/quantomatic/blob/integration/core/ROOT.ML > > > > This can be executed with, e.g. "poly --use ROOT.ML" > > > > >

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GUI Interface: drawing using Xlib primitives
by dtopham＠gmail.com 23 Dec '14

23 Dec '14

I know that there isn't a whole lot of interest in reviving the PolyML/Motif bindings idea, but it does have the advantage (over GTK+ or QT for example) of already existing! (a bird in the hand is worth two in the bush)... ...so, as part of my learning experience in PolyML, I set out to get a program working to draw on the screen. I saw comments in the XReference manual claiming that there are examples available, but searching google and the docs came up with nothing beyond the API so I had to reinvent the wheel. Since I am new at SML, I would appreciate any comments or suggestions on improving this approach to drawing. Here is what I have so far (and it works!) ------------------------------------------------------- open XWindows ; open Motif; fun square x = x * x ; fun odd x = x mod 2 = 1 ; fun power base exp = if exp = 0 then 1 else if odd exp then base * power base (exp-1) else square (power base (exp div 2)) ; fun draw1 w gc x1 y1 = let val p = XPoint {x=x1,y=y1} in XDrawPoint w gc p ; if x1 < 200 then draw1 w gc (x1 + 1) (y1 + 1) else XDrawPoint w gc p end; fun draw2 w gc x1 y1 = let val p1 = XPoint {x=x1,y=y1} ; val p2 = XPoint {x=x1+100,y=y1} in XDrawLine w gc p1 p2 ; if x1 < 100 then draw2 w gc (x1 + 1) (power x1 2) else let val p = XPoint {x=50,y=95} in XDrawString w gc p "PolyML" end end; fun main() = let val pt = XPoint {x=0,y=0} ; val rt = XRectangle {bottom=0,left=0,right=200,top=200} ; val ar = Area {x=0,y=0,w=200,h=200} ; val shell = XtAppInitialise "" "xlib" "xlib" [] [] ; val display = XtDisplay shell ; val dr = RootWindow display ; val bp = BlackPixel display ; val wp = WhitePixel display ; val w = XCreateSimpleWindow dr pt ar 5 bp wp ; val gc = XCreateGC w [] ; fun hdraw (Expose {sendEvent,region,window,count},s) = draw2 w gc 0 0 | hdraw (DeleteRequest {window},s) = XDestroyWindow window ; in XMapWindow w ; XSelectInput w [ExposureMask,ButtonPressMask] ; XSetHandler w hdraw () ; XFlush display (* Posix.Process.pause() *) end; ---------------------------------------------------- The Posix pause is needed if compiling with polyc to keep window open, but in poly interactive it is not. The attached image is what is produced. -Dave Topham

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Isabelle as an SML environment and IDE
by aleks0＠gmail.com 22 Dec '14

22 Dec '14

It recently came up on the Poly/ML mailing list that Isabelle/jEdit makes a pretty efficient SML IDE these days. I manage a fairly large SML project called Quantomatic, so I thought I'd have a go at getting a setup to work. I've got a setup now that I am pretty happy with, so I thought I'd share my results. Hopefully other people will find this helpful. Quantomatic is fairly unique in that it is designed to run inside of Isabelle or as a standalone project. As a result, the whole codebase is implemented on top of an Isabelle/ML-like environment, obtained by importing chunks of the ML code in Pure. This can be done by copying src/Pure from Isabelle 2014 into an SML project and using this file: https://github.com/Quantomatic/quantomatic/blob/integration/core/isabelle_e… In the past, we used a slightly hacked-up version of Pure, but for the sake of maintainability, we now use an exact copy. The project itself is loaded with special "thy" files that only contain comments and "ML_file" commands. These can be run from inside Isabelle/jEdit (in the "real" Isabelle/ML environment), or they can be imported in poly/ML with the function "use_thy": https://github.com/Quantomatic/quantomatic/blob/integration/core/use_thy.ML This implements a baby version of the outer syntax parser, which ignores imports and translates the ML_file commands into use statements. This makes the external ROOT.ML tiny and easy to maintain: https://github.com/Quantomatic/quantomatic/blob/integration/core/ROOT.ML This can be executed with, e.g. "poly --use ROOT.ML"

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Posix / BinIO bug (?)
by peteg42＠gmail.com 22 Dec '14

22 Dec '14

I apologise if ?bug? is not proper nomenclature in this forum. Consider the following program, stored as ?binio.sml? in the current directory: structure FS = Posix.FileSys structure IO = Posix.IO fun main () = let val fname = "binio.sml" val fd = FS.openf (fname, FS.O_RDONLY, (FS.O.flags [])) val rd = IO.mkBinReader {fd=fd, initBlkMode=false, name=fname} val stream = BinIO.mkInstream (BinIO.StreamIO.mkInstream (rd, Word8Vector.fromList [])) in print (Byte.bytesToString (BinIO.inputAll stream)) end ; main() On OS X 10.9.5 I get: $ poly --use binio.sml Poly/ML 5.5.2 Release structure FS : POSIX_FILE_SYS structure IO : POSIX_IO val main = fn: unit -> unit Assertion failed: (save_vec_addr < save_vec+1000), function push, file save_vec.cpp, line 70. Abort trap: 6 BTW is there a simpler/more canonical way to take a Posix.FileSys.file_desc into a BinIO.instream? I copied the above pretty much verbatim from the Poly/ML sources. thanks, peter

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ML_dbase
by dtopham＠gmail.com 20 Dec '14

20 Dec '14

I noticed several references to ML_dbase in the documentation (obviously I am a new user!), but do not see that file anywhere after my (virgin) PolyML version 5 installation. Is this file needed? Is it created automatically? What is it for? -Dave >

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Poly/ML
by dtopham＠gmail.com 16 Dec '14

16 Dec '14

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!

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GUI Interface (Motif)
by dtopham＠gmail.com 15 Dec '14

15 Dec '14

David, Thank you so much! I really appreciate your help with this. Your sample below builds fine with polyc on my system (PolyML 5.5.2). I am using a minimal Linux distribution named TinyCore ( http://distro.ibiblio.org/tinycorelinux/) which comes with OpenMotif 2.3.3 It runs in a virtual machine within another computer only taking up a few hundred MBs! I am going to use it to help my students explore Discrete Math next semester (this textbook uses SML for that purpose: http://cs.wheaton.edu/~tvandrun/dmfp/). I also found a reasonably current project using PolyML and Motif here: http://www.lemma-one.com/ProofPower/index/ ...however it was built on PolyML 4 and has not yet been ported to the newer version (e.g. depends on PolyML.commit which no longer seems to be supported). Happy Holidays to everyone in the PolyML community! -David Topham > Re: GUI Interface (David Matthews) > > I've experimented with building a stand-alone executable with Motif and > succeeded in getting it to work for me using polyc. (It required > building Poly/ML with --with-x). I took the example from > http://www.polyml.org/docs/Motif.html and wrapped it up in a function. > I did find a problem, though. It looks as though the function has to > suspend itself with something like Posix.Process.pause otherwise nothing > happens. I seem to recall that the Motif stuff is handled on a separate > thread to allow the REPL to continue to accept commands. With a > stand-alone application there isn't a REPL so without the "pause" it > terminates immediately. > > David > > open XWindows ; > open Motif ; > > fun main() = > let > val shell = > XtAppInitialise "" "xed" "Editor" [] [XmNwidth 400, XmNheight 400] ; > > val main = XmCreateMainWindow shell "main" [] ; > > val bar = XmCreateMenuBar main "bar" [] ; > > val fileMenu = XmCreateCascadeButton bar "file" [XmNlabelString "File"] ; > val editMenu = XmCreateCascadeButton bar "edit" [XmNlabelString "Edit"] ; > val viewMenu = XmCreateCascadeButton bar "view" [XmNlabelString "View"] ; > val helpMenu = XmCreateCascadeButton bar "help" [XmNlabelString "Help"] ; > > val command = XmCreateText main "command" [XmNeditMode XmSINGLE_LINE_EDIT] > ; > > val hscroll = XmCreateScrollBar main "hscroll" [XmNorientation > XmHORIZONTAL] ; > val vscroll = XmCreateScrollBar main "vscroll" [XmNorientation XmVERTICAL] > ; > > val work = XmCreateDrawingArea main "work" [] ; > in > > XtManageChildren [fileMenu, editMenu, viewMenu, helpMenu] ; > XtManageChildren [bar, command, hscroll, vscroll, work] ; > > XmMainWindowSetAreas main bar command hscroll vscroll work ; > > XtManageChild main ; > XtRealizeWidget shell; > Posix.Process.pause() > end; > > > ------------------------------ > > _______________________________________________ > 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 12 > *************************************** > > -- > The University of Edinburgh is a charitable body, registered in > Scotland, with registration number SC005336. > >

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GUI Interface
by dtopham＠gmail.com 14 Dec '14

14 Dec '14

> > > The X-Windows/Motif code still builds as far as I'm aware but that's as > > far as it goes. I would say it was better to use something else through > > CInterface. > > > > The Poly/ML interactive environment (read-eval-print loop or REPL) is > > usually the easiest way to develop and test your code. It prints the > > types and values of top-level expressions. When building an application > > it is probably easier to use "polyc". This is really a wrapper script > > for "poly" which compiles, exports and links a stand-alone application. > > You need to define a function called "main" that is the root function > > of your application. > > > > $ cat > testme.ML > > fun main() = print "Hello World\n"; > > $ polyc testme.ML > > $ ./a.out > > Hello World > > > > David Matthews > > > > > > Thanks for your reply David, 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 did get the interactive version of the sample Motif code to work OK, but failed to get it to build stand-alone (i.e. using polyc). Perhaps the polyc script doesn't include the needed Motif libraries? But also, my limited understanding of how to incorporate that GUI code into a main function may be to blame. I will keep trying, but after more reading, I am beginning to think that my idea to use the CInterface backwards: calling ML code from C rather than the other way around is not going to work! I had been thinking that instead of wrapping some new GUI library around ML (like the Motif code which seems to be obsolete), I could use existing C/C++ GUI frameworks and have the logic of the program be in ML, but that means calling ML functions from C. Can that be done? What surprises me is that all these years of people using ML, but no one has felt the need to write stand-alone programs for end-users that have a GUI? I don't see any example code that does that (I did see Polychrome within a web browser). ...and some examples that mention Isabelle has an IDE -- not PolyML though, just SML/NJ? and with Java required?) -Dave

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polyml Digest, Vol 110, Issue 5
by dtopham＠gmail.com 11 Dec '14

11 Dec '14

Thank you David for the suggestion to use polyc; I hadn't seen that anywhere in the documentation on the main website! I entered the code in the sample tutorial for the Motif interface and it works very well in interactive mode. When I try to use polyc on it, there is an error (attached in image file). I suspect from reading it that perhaps the "main" needed from polyc must have type that returns int, but in general (in Motif) it has return type Widget. Is polyc restricted to console only? i.e. perhaps more wrapper code is needed to make a stand-alone GUI using polyc? p.s. Even though I will take your advice and not spend too much time on Motif; I think the overall mechanics may be similar even if I find a way to use an updated GUI. On Thu, Dec 11, 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. Re: Poly/ML (David Matthews) > 2. Re: emacs SML mode (Peter Gammie) > 3. Re: emacs SML mode (Makarius) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 10 Dec 2014 12:51:42 +0000 > From: David Matthews <David.Matthews at prolingua.co.uk> > To: polyml at inf.ed.ac.uk > Subject: Re: [polyml] Poly/ML > Message-ID: <548841DE.1050306 at prolingua.co.uk> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > The X-Windows/Motif code still builds as far as I'm aware but that's as > far as it goes. I would say it was better to use something else through > CInterface. > > The Poly/ML interactive environment (read-eval-print loop or REPL) is > usually the easiest way to develop and test your code. It prints the > types and values of top-level expressions. When building an application > it is probably easier to use "polyc". This is really a wrapper script > for "poly" which compiles, exports and links a stand-alone application. > You need to define a function called "main" that is the root function > of your application. > > $ cat > testme.ML > fun main() = print "Hello World\n"; > $ polyc testme.ML > $ ./a.out > Hello World > > David > > On 09/12/2014 17:25, David Topham wrote: > > 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 > > > > > ------------------------------ > > Message: 2 > Date: Wed, 10 Dec 2014 20:52:36 -0600 > From: Peter Gammie <peteg42 at gmail.com> > To: PolyML mailing list <polyml at inf.ed.ac.uk> > Cc: Stefan Monnier <monnier at iro.umontreal.ca> > Subject: Re: [polyml] emacs SML mode > Message-ID: <78D81D05-7A9A-4BB6-83FE-2790F21B48E4 at gmail.com> > Content-Type: text/plain; charset="windows-1252" > > David, Makarius, > > On 3 Dec 2014, at 13:20, Makarius <makarius at sketis.net> wrote: > > > Here is also an example for that, to implement a home-made "eval" > function in Poly/ML: > http://stackoverflow.com/questions/9555790/does-sml-poly-have-a-cl-like-repl > > > > This should give some clues how to do it. It is up to that function to > say how errors are printed. > > > > An actual REPL requires a bit more work, with proper handling of > interrupts in contrast to regular exceptions. Isabelle2014 still happens > to have such a REPL in isar.ML, but it is not used by default and already > deleted for the next release. (Such a nostalgic REPL is actually more > complicated than having a direct editing model that is now standard in > Isabelle/PIDE.) > > Thanks for the pointer. I?ve stashed this one away for a rainy day. Right > now I just want to interact with Poly/ML in the most straightforward way. > > On 3 Dec 2014, at 5:33, David Matthews <dm at prolingua.co.uk> wrote: > > > It would be nice to have SML emacs mode working with Poly/ML for those > who would like to use it but my feeling is that it is rather > old-fashioned. Poly/ML now supports a much more extensive interface > designed for an IDE. The best example of this is Isabelle's ML mode. See > http://sketis.net/2014/isabellepide-as-ide-for-standard-ml which has a > nice screen-shot. Lucas Dixon and I both had a go at producing IDEs which > were completely independent of Isabelle but we didn?t get as far as > Makarius has. > > I?m not adverse to trying out JEdit, but it seems to dodge the issues > somewhat. Is anyone using it for hacking large-scale SML programs? > > One measure of adequacy might be if JEdit/SML (err, Isabelle/SML?) can > load the foundational Isabelle stuff, e.g. Pure/ROOT.ML. (How do you hack > Isabelle/Pure presently?) > > In particular I?d want access to Poly/ML?s concurrency primitives. It > seems to nuke Poly/ML?s ?use? function, which is a little unfriendly. > > BTW I have no problem cranking out .thy files as a kind of fake build > system if that?s what it takes. > > > The format that the default REPL uses for error messages was one that > was used by various compilers at one time and it used to be possible to > parse it automatically. If there's a more up-to-date format I'm happy to > change to it. I don?t know if anyone is parsing the current format > automatically and would be inconvenienced by a change. > > Me neither. Hide it under a flag? Or are you (and Makarius) suggesting > that I hand-roll my own REPL? (I?m not adverse to that either.) > > thanks, > peter > > ? > http://peteg.org/ >

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