Poly/ML July 2015

polyml@lists.polyml.org

4 participants
6 discussions

linking polyML modules to C
by dtopham＠gmail.com 09 Nov '18

09 Nov '18

After more experimenting with GUI in SML, I would like to now try calling an SML module from a C program. That way, the GUI could be built using traditional imperative techniques and the program logic could be written in SML. I see how to call a C function from SML, but and not so clear on how to call an SML function from a C program. I want to build code using polyc and then link with a C main program, but could anyone show me a simple example of calling that function and getting its return value? for example, I have defined: fun sum i n f = if i > n then 0.0 else f i + sum (i+1) n f ; fun int2real x = real x ; in linkToC.sml and #include <iostream> #include <fstream> std::ofstream ofs; int main() { std::cout << sum(1,10,int2real) << std::endl; ofs.open("table.dat"); for(int i = 0; i < 20; i++) ofs << i << '\t' << sum(1,i,int2real) << std::endl; } in linkToC.cpp Looking in the polyc script, I thought adding the -c option might allow me to build the object code which I could then link to the sml functions, but it complains about not having a main. Could someone point me in the right direction? Thanks, Dave On Mon, Dec 15, 2014 at 11:44 AM, David Topham <dtopham at gmail.com> wrote: > 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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Inspecting structures
by ramana.kumar＠gmail.com 27 Jan '16

27 Jan '16

Is there a way to look at the contents (i.e. signature) of a structure without opening it? (I suppose you could just open it then call a lot of PolyML.Compiler.forgetXXX, but that's quite tedious) Also, is it possible to retrieve the long path of an identifier in scope? Something that will, for example, take the rev in scope and say that it came from List. Finally, what about searching for an identifier that would come into scope if you opened some structures?

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error building from SVN
by Michael.Norrish＠nicta.com.au 11 Aug '15

11 Aug '15

My Travis CI builds of HOL using a Subversion checkout of Poly (as opposed to the released version, which I also check), are failing to build Poly with the error below. (See also https://travis-ci.org/HOL-Theorem-Prover/HOL/jobs/56529081). Is this expected, or some quirk of the Travis setup? Michael -- Error- in './basis/FinalPolyML.sml', line 1607. Value or constructor (decodeBinary) has not been declared Error- in './basis/FinalPolyML.sml', line 1608. Value or constructor (encodeBinary) has not been declared Exception trace for exception - Fail raised in mlsource/MLCompiler/MAKE_.ML line 423 MAKE_().useIntoEnv(2) <top level> CODETREE().genCode(3)(1) COMPILER_BODY().baseCompiler(3)executeCode(1) End of trace Exception trace for exception - Fail raised in mlsource/MLCompiler/MAKE_.ML line 423 MAKE_().useIntoEnv(2) <top level> CODETREE().genCode(3)(1) COMPILER_BODY().baseCompiler(3)executeCode(1) End of trace ________________________________ The information in this e-mail may be confidential and subject to legal professional privilege and/or copyright. National ICT Australia Limited accepts no liability for any damage caused by this email or its attachments.

9 18

Truth Tables
by dtopham＠gmail.com 30 Jul '15

30 Jul '15

As part of my ongoing efforts to introduce the use of SML to complement the teaching of discrete math, I have prepared some slides showing one way to print truth tables. Since my knowledge and experience in SML is so limited, I would appreciate any constructive comments on how to improve this approach. (I am afraid my many years of using C++ has made it difficult to transition to the functional way of thinking!) Attached is pdf of slides with SML embedded. (similar to literate programming). I am grateful for the use of ProofPower as a development environment since it allows me to combine Latex and SML in one document and extract the pieces when needed. -Dave

1 0

Interpreter commands?
by dtopham＠ohlone.edu 17 Jul '15

17 Jul '15

Are there commands for the PolyML interpreter to do things list the values in the current environment? e.g. If I have loaded or defined several functions and then want to review them as reference to calling them correctly, is there a way to display their prototypes? (I did look through the documentation and tried to search the "archives" but I don't seem to have a search feature for that purpose) -Dave p.s. I did discover the use of rlwarp (on Linux) to solve the problem of not being able to use arrow keys within the interpreter--that is a nice addition for repeating previous commands. i.e. rlwrap poly

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PolyML on AArch64
by chneukirchen＠gmail.com 13 Jul '15

13 Jul '15

Hi, I have added 64-bit ARM support for PolyML, using the interpreted mode. It seems to be enough to natively compile and run the test suite completely. Tested on Linux voidarm64 3.16.0-37-generic #51-Ubuntu SMP Tue May 5 13:51:19 UTC 2015 aarch64 aarch64 aarch64 GNU/Linux

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Poly/ML July 2015