Hermes: A Tutorial and Reference Manual - Researcher - IBM

createstheclient,createsthelter,andconnectsthetwotogether.The clientmaybeanyprogramwithourstandard3-pluginterface,suchas HelloWorld,Echo,orevenCompounditself.We'llassumethattheinput clientprogram,anditsarguments,separatedbythedelimiter`/'. stringParms.ParmStringreceivedbyCompoundcontainsthenameofthe receiveParmsfromInit; 1.IntroductiontoHermes15
ofCMark); blockbegin ClientName:="filter"; Arguments:=everyofCinParms.ParmStringwhere(position ClientName:=everyofCinParms.ParmStringwhere(position Filter:=createofParms.GetProgram(ClientName);
on(NotFound) Client:=createofParms.GetProgram(ClientName); callFilter(Parms.PutLine,"TheFilter",CliToFil); callClient(Parms.GetLine,CliToFil,Parms.GetProgram,Arguments); Mark:=positionofCinParms.ParmStringwhere(C='/');
on(InterfaceMismatch) on(GetProgramInterface.NotFound)
callParms.PutLine("compound:SyntaxError."); callParms.PutLine("compound:"|ClientName|"notfound.");
assourcetext.Therearethreewaystoobtainvaluesoftypeprogram: statementsofaprocessmodulestoredasstructuredvaluesratherthan ofthepredenedHermesdatatypeprogram|asetofdeclarationsand TheresultreturnedbyGetProgramisaprogram.Aprogramisavalue characterstringnameofaprogramtobefetchedfromtheprogramlibrary. returnParms; TheprogrambeginsbycallingtheserviceGetProgram,passingitthe endblock; "interfacemismatch.");
value\on-the-y".Inthiscase,weareusingtherstapproach.Wehave (2)bywritinga\programliteral",and(3)bydirectlybuildingaprogram (1)bypassingthesourcetextofaHermesprocessthroughthecompiler, savingtheresultinaprogramlibrary,andretrievingitwithGetProgram, assumedthattheprogramnamed"filter"hasbeenpreviouslycompiled andthatthecompiledprogramhasbeenplacedinalibrarymanagedby theGetProgramservice. notsupporton-the-yprogramcreation.Someweaklytyped2languages andrun-timecheckingfortypeviolations. (Note:Stronglytypedlanguages,likeAlgol,Ada,Pascal,C,etc.,do 2Thetermsstrongly-typedandweakly-typeddenoterespectivelycompile-time