MAKEGRAPHdocumentationD.AustinHenderson,Jr.Lastrevised:March17,1983MAKEGRAPH(and.DCOM)isapackagewhichsitsontopofGrapherandhelpsonecreategraphsdepictingadatastructurebywalkingthroughit.Thecentralideaisthateachpointinthewalk(andnodeinthegraph)ischaracterizedbyadatum/statepairandmotionisdefinedbyagraphspecificationintheformofstatetransitionfunction.Thisfunctionisspecifiedbyacollectionofstatespecifications,eachofwhichindicateshowtodisplay(labelandfont)thedatumwhenoneisinthatstateandhowtofindthedatum/statepairswhicharethesonsofthatnode.Alsothestatespecificationmayspecifyadditionalrootsforthewalk.Thegenerationofabranchofthegraphceaseswheneithertherearenosonsofanode,oranalreadyencounterednodeisrevisited(identicaldatumandidenticalstate).Thepackagecontainsafunctionforcreatingsuchgraphsandanexampleofitsuse:afunctionwhichgraphsthegraphspecificationsthemselves.Commentsarewelcomed.Themainfunctions:MAKE.GRAPH(WINDOWTITLEGRAPH.SPECIFICATIONROOTSCONTEXTLEFTBUTTONFNMIDDLEBUTTONFNTOPJUSTIFYFLGDEPTH)CreatesaMAKEGRAPHwindow.IfWINDOWisNIL,thenanewonewillbecreatedandtheuserwillbepromptedtopositionit.Otherwise,thegraphwillbeshowninWINDOW.ThewindowwillbetitledwithTITLE,willcallLEFTBUTTONFNandMIDDLEBUTTONFNonnodesselected(orNILifselectionismadewherenonodeispositioned),andwillbejustifiedasindicatedbyTOPJUSTIFYFLG(alaGrapher).ThebuttonfunctionsaredefaultedtoMAKE.GRAPH.LEFTBUTTONFN(whichscrollsthewindowsothattheselectednodeisinthemiddleofthewindow,oriftheleftshiftkeyisdepressed,printsoutinformationaboutit)andMAKE.GRAPH.MIDDLEBUTTONFN(whichprovidesamenuoftwochoices:INSPECT-inspectsthedatumofthenodeselected,oriftheleftshiftkeyisdepressed,inspectsthenodeitself;andSUB.GRAPH-whichopensanotherMAKEGRAPHwindowwiththesameparametersasthisone,butwithgraphstartingattheselectednode).TheargumentstoMAKE.GRAPHareaddedaspropertiestothewindowundertheirargumentnames.SelectinginthetitleinvokesthefunctionswhicharethevaluesofthewindowpropertiesTITLE.LEFTBUTTONFNandTITLE.MIDDLEBUTTONFN(notinthecallingsequence;setbytheuserifdesired;calledwithasingleargument-WINDOW;defaultedtoafunctionwhichprovidesamenuofUPDATEandSHOW.GRAPH.SPEC(seefunctionalitybelow)).ThegraphiscreatedaccordingtotheGRAPH.SPECIFICATION(seebelow)todepthDEPTH,startingfromROOTSwhichare(DATUM.STATE)pairs.CONTEXTisanextraargumentwhichisapassedalongtoallaccessingexpressions.AGRAPH.SPECIFICATIONisapropertylistofSTATE.SPECIFICATIONswherethepropertiesarethestatenames.ASTATE.SPECIFICATIONisapropertylistwhosepropertiesandvaluesareasfollows(inthis,EXPRmeansaLISPformwhichwillbeevaluatedinanenvironmentinwhichDATUMisboundtothenode'sdatum,STATEtothenode'sstate,andCONTEXTtocontext):LABEL:anexpressionreturningsomethingwhichwillbeprintedasthelabelofthenode;ifnoLABELpropertyisprovided,thestring"???"willbeused.FONT:anexpressionreturningthefonttobeusedforthisnode;ifnoFONTpropertyisprovided,thedefaultfontforthegrapherwillbeused.SONS:aformindicatingalistof(DATUM.STATE)pairstobeusedingeneratingthesonsofthisnode;theacceptableformsareanyofthefollowing:(data-expressionstate-expression)wheredata-expressionreturnsalistofdatum'sforthesonnodes,andstate-expressionisevaluatedinthecontextofeachoftheseinturntoproducethecorrespondingstateofeach.(LIST(datum-expressionstate-expression)...(datum-expressionstate-expression))atemplateofexpressionswhichareevaluatedindividuallytoproducealistofsonsofthesameform,viz.(DATUM.STATE)pairs.(EVALexpression)theexpressionreturnsalistof(DATUM.STATE)pairsofthesons.(UNIONsons-spec...sons-spec)whereeachsons-specisanyoftheseforms(recursively).(TRACEsons-spec)adeviceforhelpingdebuggraphspecifications;thevalueisthevalueofsons-specs;theuserisgiventhechancetoINSPECTthemaftertheyhavebeengenerated.ROOTS:likeSONS,excepttheresulting(DATUM.STATE)pairsareusedaspossiblyadditionalrootsofthegraph.MAKE.GRAPH.CONSTRUCT(GRAPH.SPECIFICATIONINITIAL.ROOTSCONTEXTDEPTH)ThisisthefunctionalheartofMAKE.GRAPHbrokenoutforthosewhowishtohandletheirowninteractswithgrapherandthewindowpackage.ItproducesalistofgraphnodeswithlabelsandsonsasspecifiedbyGRAPH.SPECIFICATION(seeMAKEGRAPH),startingfromINITIAL.ROOTSwhichare(DATUM.STATE)pairs.CONTEXTisanextraargumentwhichisapassedalongtoallaccessingexpressions.Returnsthelistofgraphnodes.pН ЙОc/Н ЙОb6qНPН;Оb6Оb6НAОb6Н ЙО`чН oНP Н█НИНОО`чН ЙО_├НН╛НІНН"nО_├О_├Н"tО_├Н ЙО]ЗН≥О]ЗО]ЗНЯН СН СО]ЗrО]ЗН%нО]ЗsО]ЗН&÷Н'щН(зН-КН1хН3ЬН5пН8Н9║Н?НA┴НDЬНGuНGuО]ЗН ЙО\VНҐНЧНиНфН°Н"'Н#УН(ЦН-ИН/hН2Н6gН91Н:oН=Н@НC~НDЧНG/НJEНJ²НJ²О\VН ЙОZсН ЛН/Н╞НЮННTН"qН$?Н%<Н%<ОZсОZс Н,ІН%<ОZ╣Ч кН/ОZсОZсН/_Н1ХН6sН7╠Н<─Н>NН?KН?KОZсОZсНCН?KОZ╣ЧНJ]ОZсОZсНJ╣НJ╣ОZсН ЙОYPНjН⌡НсН^Н` НKН!ИН$сН*Н+XН0АН2╞Н3╛ Н9╚Н;6Н;6ОYPОYPН>8 Н;6ОY2Ч шНFОYPОYPНFаНIцНIцОYPН ЙОWмНuНRНпН╔Н%НіНОWмОWмНОW╞ЧтН!СОWмОWмН"KН$тН$тОWмОWмН$тОW╞ЧgН';ОWмОWмН(Н*=Н.]Н1ЦН4`Н5·Н7Н9ҐН<©Н?HНBНC²НF\НH█НH█ОWмН ЙОVJ НdН▒НnН■НеНеОVJОVJНеОV,Ч┬Н MОVJОVJН ╔Н"0Н$оН(iН+hН-≥Н0⌡Н8HН;Н?┼ НEлНEлОVJОVJНEлОV,ЧЙНHІОVJОVJНIНIОVJН ЙОTгНЫН*Н≈Н@ НяН\НYН"фН$QН&┌Н*?Н.(Н1ўН5jН8дН:ЙН<бН?╒НA-НB*НEеНG[НIНIОTгН ЙОSDН█ Н2НuНЁН! 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Йq?─[гтMAKE.GRAPH.FIND.ROOTS(GRAPH.SPECIFICATIONINITIAL.ROOTSCONTEXTDEPTH)Findstherealrootsfromasetofinitialroots,usingthesameprocessingasMAKEGRAPHuses.Thisishelpfulwhenyouwanttohanda"correct"setofrootsofastructuretoMAKEGRAPHwithouthavingtoexplorethedependencieswithinthatstructure.AswithMAKEGRAPH,thedatastructureisprocessedaccordingtotheGRAPH.SPECIFICATION(seeMAKEGRAPH),startingfromINITIAL.ROOTSwhichare(DATUM.STATE)pairs.CONTEXTisanextraargumentwhichisapassedalongtoallaccessingexpressions.Returnstherealrootsasalistof(DATUM.STATE)pairs.Supportingfunctions:MAKE.GRAPH.UPDATE.WINDOW(WINDOW)Usesthewindowproperties(whichmayhavebeenchanged)toreinvokeMAKE.GRAPHonthewindow.MAKE.GRAPH.SHOW.LIST(OBJECT)Thisisasimpleexamplefunction.Supposewewantedtolayoutliststructureasagraph.Inthegraph,wewantedalisttobelabeledby"()"anditssonstobetheelementsofthelist.Forexample,thegraphof'(AB(CD))shouldlooksomethinglike:A/()-BC\/()\DMAKE.GRAPH.SHOW.LISTusesMAKE.GRAPHtoproducesuchgraphs.ItpresentsOBJECTasatreewhosenodesareLISTPsandwhoseleavesarenon-LISTPs.Thelayoutspecificationthatituses(savedinthevalueofthevariableMAKE.GRAPH.LIST.SPEC)isincludedhereasanexampleofasimple,1-stategraph.specification.(OBJECT(DOC(ANYLISPOBJECT)-somedocumentationLABEL(COND((LISTPDATUM)"()")(TDATUM))SONS((COND((LISTPDATUM)DATUM)(TNIL))(QUOTEOBJECT))))MAKE.GRAPH.SHOW.SPEC(GRAPH.SPECIFICATION)UsesMAKE.GRAPHtoproducedagraphofaGRAPH.SPECIFICATION.Itusesasthegraph.specificationforthislayoutthevalueofthevariableMAKE.GRAPH.SPEC.SPECwhichpresentsGRAPH.SPECIFICATION(reflectively)asagraph.specification.(GRAPH.SPECIFICATIONcanserveasatemplateforothergraph.specifications.Itisafairlycomplex9-statespecification.)MAKE.GRAPH.EXAMPLE.1()CallsMAKE.GRAPH.SHOW.SPEConMAKE.GRAPH.SPEC.SPEC.ForamorecomplexexampleseeaboveunderMAKE.GRAPH.SHOW.SPEC.)MAKE.GRAPH.EXAMPLE.2()CallsMAKE.GRAPH.SHOW.LISTonMAKE.GRAPH.LIST.SPEC;thatis,producesagraphofthissimplegraph.specificationasalist.NoticethatselectingthetitlecommandUPDATEinthiswindowwillyieldadifferentgraphofthesamestructure,viz.asagraph.specification.Otherusefulfunctions:MAKE.GRAPH.DATUM(NODE)ReturnstheDATUMassociatedwiththegraphnodeNODE.MAKE.GRAPH.STATE(NODE)ReturnstheSTATEassociatedwiththegraphnodeNODE.MAKE.GRAPH.FATHER(NODE)ReturnsthegraphnodewhichisthefatherofthegraphnodeNODE.Н 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