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Del 9325 - Lecture Notes in Computer Science
Programming Languages
19th Brazilian Symposium SBLP 2015, Belo Horizonte, Brazil, September 24-25, 2015, Proceedings
AvAlberto Pardo,S. Doaitse Swierstra
Häftad, Engelska, 2015
460 kr
Skickas inom 10-15 vardagar
This book constitutes the proceedings of the 19th Brazilian Symposium on Progamming Languages, SBLP 2015, held in Belo Horizonte, Brazil, in September 2015. The 10 papers presented in this volume were carefully reviewed and selected from 26 submissions. They deal with fundamental principles and innovations in the design and implementation of programming languages and systems.
Programming Languages
19th Brazilian Symposium SBLP 2015, Belo Horizonte, Brazil, September 24-25, 2015, Proceedings
AvS. Doaitse Swierstra,Alberto Pardo
E-bok
PDF, Engelska, 2015
571 kr
Läs direkt efter köp
This book constitutes the proceedings of the 19th Brazilian Symposium on Progamming Languages, SBLP 2015, held in Belo Horizonte, Brazil, in September 2015.
The 10 papers presented in this volume were carefully reviewed and selected from 26 submissions. They deal with fundamental principles and innovations in the design and implementation of programming languages and systems.
Advanced Functional Programming
Third International School, AFP''98, Braga, Portugal, September 12-19, 1998, Revised Lectures
AvJose N. Oliveira,Pedro R. Henriquesm. fl.
E-bok
PDF, Engelska, 2006
739 kr
Läs direkt efter köp
Programming Languages and Systems
8th European Symposium on Programming, ESOP''99 Held as Part of the Joint European Conferences on Theory and Practice of Software, ETAPS''99, Amsterdam, The Netherlands, March 22-28, 1999 Proceedings
AvS. Doaitse Swierstra
E-bok
PDF, Engelska, 2003
739 kr
Läs direkt efter köp
This is the second time that of ESOP has formed part of the ETAPS cluster of conferences, workshops, working group meetings and other associated activities. One of the results of colocatingso many conferences is a reduction in the number of possibilities to submit a paper to a European conference and the increased competition between conferences that occurs when boundaries between indiv- ual conferences have not yet become well established. This may have been the reason for the fact that only 44 submission were received this year. On the other hand we feel that the average quality of submissions has gone up, and thus the program committee was able to select 18 good papers, only one less than the year before. The program committee did not meet physically, and all discussion was done usinga Web-driven data base system. Despite some mixed feelings there is an overall tendency to appreciate the extra time available for giving papers a s- ond look and really going into comments made by other program committee members. I want to thank my fellow program committee members for the work they have put into the refereeingprocess and the valuable feedback they have given to authors. I want to thank the referees for their work and many detailed comments, and ?nally I want to thank everyone who has submitted a paper: without authors, no conference.
Programming Languages and Systems
8th European Symposium on Programming, ESOP'99 Held as Part of the Joint European Conferences on Theory and Practice of Software, ETAPS'99, Amsterdam, The Netherlands, March 22-28, 1999 Proceedings
AvS. Doaitse Swierstra
Häftad, Engelska, 1999
573 kr
Skickas inom 10-15 vardagar
This is the second time that of ESOP has formed part of the ETAPS cluster of conferences, workshops, working group meetings and other associated activities. One of the results of colocatingso many conferences is a reduction in the number of possibilities to submit a paper to a European conference and the increased competition between conferences that occurs when boundaries between indiv- ual conferences have not yet become well established. This may have been the reason for the fact that only 44 submission were received this year. On the other hand we feel that the average quality of submissions has gone up, and thus the program committee was able to select 18 good papers, only one less than the year before. The program committee did not meet physically, and all discussion was done usinga Web-driven data base system. Despite some mixed feelings there is an overall tendency to appreciate the extra time available for giving papers a s- ond look and really going into comments made by other program committee members. I want to thank my fellow program committee members for the work they have put into the refereeingprocess and the valuable feedback they have given to authors. I want to thank the referees for their work and many detailed comments, and ?nally I want to thank everyone who has submitted a paper: without authors, no conference.
Advanced Functional Programming
Third International School, AFP'98, Braga, Portugal, September 12-19, 1998, Revised Lectures
AvS. Doaitse Swierstra,Pedro R. Henriquesm. fl.
Häftad, Engelska, 1999
573 kr
Skickas inom 10-15 vardagar
Inthisvolumeyouwill?ndthelecturenotescorrespondingtothepres- rd tationsgivenatthe3 summerschoolonAdvancedFunctionalProgramming, heldinBraga,PortugalfromSeptember12-19,1998. ThisschoolwasprecededbyearlieronesinB?astad(1995,Sweden,LNCS925) andOlympia,WA(1996,USA,LNCS1129). Thegoalofthisseriesofschoolsis tobringrecentdevelopmentsintheareaoffunctionalprogrammingtoalarge groupofstudents. Thenotesarepublishedinordertoenableindividuals,small studygroups,andlecturerstobecomeacquaintedwithrecentworkinthefast developingareaoffunctionalprogramming. Whatmadethisschoolparticularlyinterestingwasthefactthatalllectures introducedusefulsoftware,thatwasusedbythestudentsintheclassestoget hands-onexperiencewiththesubjectstaught. Weurgereadersofthisvolumeto downloadthelatestversionofthissoftwarefromtheInternetandtrytodothe exercisesfromthetextthemselves;theproofoftheprogramisinthetyping. The?rstlecture,onSortingMorphisms,servesasagentleintroductiontothe thingstocome. Ifyouhavealwaysbeenafraidoftheword"morphism",andyou havebeenwonderingwhatcatamorphisms,anamorphisms,hylomorphims,and paramorphimswereabout,thisisthepapertoread?rst;youwilldiscoverthat theyaremerelynamesforrecursionpatternsthatoccuroverandoveragainwhen writingfunctionalprograms.Thealgorithmsinthepaperareallaboutsorting, andsinceyouarelikelytoknowthosealgorithmsbyheartalready,seeingthem structuredandanalyzedinanovelwayshouldserveasamotivationtoreadon tothesecondlecture. Thesecondlecture,onGenericProgramming,isalmostabookinabook. ThenotescanbeseenastheculminatingpointoftheSTOP-project,sponsored bytheDutchgovernmentattheendofthe80'sandthebeginningofthe90's. Its overallgoalwasthedevelopmentofacalculationalwayofderivingprograms. The projecthasprovideddeeperinsightintorealfunctionalprogrammingandinto thetheorybehindmanythingscommonlywrittenbyfunctionalprogrammers. Oneofthemainachievementsoftheprojecthasbeentomakepeopleaware ofthefactthatmanyalgorithmscanbedescribedinadata-independentway. ThePolyPsystemintroducedinthesenotesisoneofthetranslationstothe Haskell-worldofthistheoreticalunderpinning. Thethirdlecture,onGenericProgramTransformation,canalsobeseenas anapplicationofthetheoryintroducedinlecturetwo. Manye?ciency-improving programtransformationscanbeperformedinamechanicalway,andthesewould nothavebeenpossiblewithoutinsightintothecorrectnessofsuchtransfor- tionsgainedinthelectureonGenericProgramming.Thefourthlecture,onDesigningandImplementingCombinatorLanguages, introducesaneasytowriteformalismforwritingdownthecatamorphismsint- ducedinearlierchapters. Itisshownhowquitecomplicatedcatamorphisms,that at?rstsightseemratherforbiddingbymakingextensiveuseofhigher-orderdo- VI Preface mains,canactuallybedevelopedinastep-wisefashion,usinganattributegr- marview;itisfurthermoreshownhowtorelatethiswayofprogrammingwith conceptsfromtheobject-orientedworldthusmakingclearwhatthestrengths andweaknessesofeachworldare. The?fthlecture,titledUsingMetaML:AStagedProgrammingLanguage, introducestheconceptofpartialevaluation. Itservesasanotherinstanceof thequestfor"themostgenericofwritingprogramsatthelowestcost". The stagingtechniquesshowhowcoststhatwereintroducedbyaddingextralevels ofabstraction,maybemovedfromrun-timetocompile-time. Ithasbeencommonknowledgetousersofmodernfunctionallanguagesthat thetypesystemcanbeagreathelpinshorteningprogramsandreducingerrors. Intheextremeonemightseeatypeasapredicatecapturingtheproperties ofanyexpressionwiththattype.InthesixthlectureonCayenne-Spiceup yourProgrammingwithDependentTypesitisshowninwhatdirectionfunctional languagesaremostlikelytodevelop,andwhatmaybeexpectedofthenewtype systemstobeintroduced. Thelastlecture,titledHaskellasanAutomationController,showsthat writingfunctionalprogramsdoesnothavetoimplythatoneisboundtoremain isolatedfromtherestoftheworld. Beingabletocommunicatewithsoftware writtenbyothersinauniformway,isprobablyoneofthemostinteresting newdevelopmentsincurrentcomputerscience. Itappearsthattheconceptofa monadtogetherwiththeHaskelltypingrules,isquiteadequatetodescribethe interfacebetweenHaskellprogramsandtheouterworld. Finallywewanttothankeveryonewhocontributedtothisschoolandmade itsuchasuccessfulevent:sponsors,localsystemmanagers,localorganizers, students,andlastbutnotleastthelecturers. Weareconvincedthateveryone presentattheschoolenjoyedthiseventasmuchaswedid,andweallhopethat youwillfeelsomeofthespiritofthiseventwhenstudyingtheselecturenotes.March1999 DoaitseSwierstra PedroHenriques Jos'eOliveira VII Sponsorship Theschoolhasreceivedgeneroussponsorshipfrom: FCT-Fundac",aoparaaCienciaeTecnologia,Minist'eriodaCienciae Tecnologia AdegaCooperativadePontedeLima AgenciaAbreu CGD-CaixaGeraldeDep'ositos CIUM-CentrodeInform'aticadaUniversidadedoMinho DI-DepartamentodeInform'aticadaUniversidadedoMinho GEPL-GrupodeEspeci?cac",aoeProcessamentodeLinguagens LESI-Direc,c"aodeCursodeEngenhariadeSistemaseInform'atica Enabler Lactolima Latic'?niosdasMarinhas,Lda NovabasePorto-SistemasdeInforma,c"aoSA PrimaveraSoftware ProjectoCamila-GrupodeM'etodosFormais Sidereus-SistemasdeInforma,c"aoeConsultoriaInformat'icaLda SIBS-SociedadeInterbanc'ariadeServico,s VieiradeCastro LocalCommittee: Jos'eAlmeida,Minho Lu'?sBarbosa,Minho Jos'eBarros,Minho M. Joao " Frade,Minho PedroHenriques,Minho F. M'arioMartins,Minho F. LuisNeves,Minho CarlaOliveira,Minho JorgePinto,Lix JorgeRocha,Minho CesarRodrigues,Minho Joa"oSaraiva,Minho M. Joa"s. Its overallgoalwasthedevelopmentofacalculationalwayofderivingprograms. The projecthasprovideddeeperinsightintorealfunctionalprogrammingandinto thetheorybehindmanythingscommonlywrittenbyfunctionalprogrammers.Oneofthemainachievementsoftheprojecthasbeentomakepeopleaware ofthefactthatmanyalgorithmscanbedescribedinadata-independentway. ThePolyPsystemintroducedinthesenotesisoneofthetranslationstothe Haskell-worldofthistheoreticalunderpinning. Thethirdlecture,onGenericProgramTransformation,canalsobeseenas anapplicationofthetheoryintroducedinlecturetwo. Manye?ciency-improving programtransformationscanbeperformedinamechanicalway,andthesewould nothavebeenpossiblewithoutinsightintothecorrectnessofsuchtransfor- tionsgainedinthelectureonGenericProgramming. Thefourthlecture,onDesigningandImplementingCombinatorLanguages, introducesaneasytowriteformalismforwritingdownthecatamorphismsint- ducedinearlierchapters. Itisshownhowquitecomplicatedcatamorphisms,that at?rstsightseemratherforbiddingbymakingextensiveuseofhigher-orderdo- VI Preface mains,canactuallybedevelopedinastep-wisefashion,usinganattributegr- marview;itisfurthermoreshownhowtorelatethiswayofprogrammingwith conceptsfromtheobject-orientedworldthusmakingclearwhatthestrengths andweaknessesofeachworldare. The?fthlecture,titledUsingMetaML:AStagedProgrammingLanguage, introducestheconceptofpartialevaluation.Itservesasanotherinstanceof thequestfor"themostgenericofwritingprogramsatthelowestcost". The stagingtechniquesshowhowcoststhatwereintroducedbyaddingextralevels ofabstraction,maybemovedfromrun-timetocompile-time. Ithasbeencommonknowledgetousersofmodernfunctionallanguagesthat thetypesystemcanbeagreathelpinshorteningprogramsandreducingerrors. Intheextremeonemightseeatypeasapredicatecapturingtheproperties ofanyexpressionwiththattype. InthesixthlectureonCayenne-Spiceup yourProgrammingwithDependentTypesitisshowninwhatdirectionfunctional languagesaremostlikelytodevelop,andwhatmaybeexpectedofthenewtype systemstobeintroduced. Thelastlecture,titledHaskellasanAutomationController,showsthat writingfunctionalprogramsdoesnothavetoimplythatoneisboundtoremain isolatedfromtherestoftheworld. Beingabletocommunicatewithsoftware writtenbyothersinauniformway,isprobablyoneofthemostinteresting newdevelopmentsincurrentcomputerscience. Itappearsthattheconceptofa monadtogetherwiththeHaskelltypingrules,isquiteadequatetodescribethe interfacebetweenHaskellprogramsandtheouterworld.Finallywewanttothankeveryonewhocontributedtothisschoolandmade itsuchasuccessfulevent:sponsors,localsystemmanagers,localorganizers, students,andlastbutnotleastthelecturers. Weareconvincedthateveryone presentattheschoolenjoyedthiseventasmuchaswedid,andweallhopethat youwillfeelsomeofthespiritofthiseventwhenstudyingtheselecturenotes. March1999 DoaitseSwierstra PedroHenriques Jos'eOliveira VII Sponsorship Theschoolhasreceivedgeneroussponsorshipfrom: FCT-Fundac"caoparaaCienciaeTecnologia,Minist'eriodaCienciae Tecnologia AdegaCooperativadePontedeLima AgenciaAbreu CGD-CaixaGeraldeDep'ositos CIUM-CentrodeInform'aticadaUniversidadedoMinho DI-DepartamentodeInform'aticadaUniversidadedoMinho GEPL-GrupodeEspeci?cac"caoeProcessamentodeLinguagens LESI-Direccc"aodeCursodeEngenhariadeSistemaseInform'atica Enabler Lactolima Latic'?niosdasMarinhas,Lda NovabasePorto-SistemasdeInformacc"aoSA PrimaveraSoftware ProjectoCamila-GrupodeM'etodosFormais Sidereus-SistemasdeInformacc"aoeConsultoriaInformat'icaLda SIBS-SociedadeInterbanc'ariadeServicocs VieiradeCastro LocalCommittee: Jos'eAlmeida,Minho Lu'?sBarbosa,Minho Jos'eBarros,Minho M. Joao " Frade,Minho PedroHenriques,Minho F. M'arioMartins,Minho F.LuisNeves,Minho CarlaOliveira,Minho JorgePinto,Lix JorgeRocha,Minho CesarRodrigues,Minho Joa"oSaraiva,Minho M. Joa"oVaranda,Minho IX TableofContents SortingMorphisms...1 LexAugusteijn 1 Introduction...1 2 MorphismsonLists...2 2. 1 TheListCatamorphism...2 2. 2 TheListAnamorphism...4 2. 3 TheListHylomorphism...5 2. 4 InsertionSort...6 2. 5 SelectionSorts...7 3 LeafTrees...9 3. 1 TheLeaf-TreeCatamorphism...9 3. 2 TheLeaf-TreeAnamorphism...10 3. 3 TheLeaf-TreeHylomorphism...11 3. 4 MergeSort...12 4 BinaryTrees...13 4. 1 TheTreeCatamorphism...13 4. 2 TheTreeAnamorphism...14 4. 3 TheTreeHylomorphism...14 4. 4 Quicksort...15 4. 5 HeapSort...16 5 Paramorphisms...18 5. 1 TheListParamorphism...18 5. 2 InsertAsParamorphism...18 5. 3 RemoveAsParamorphism...19 6 GeneralizingDataStructures...20 6. 1 GeneralizingQuicksort...20 6. 2 GeneralizingHeapSort...21 7 Conclusions...23 GenericProgramming-AnIntroduction-...28 RolandBackhouse,PatrikJansson,JohanJeuring,LambertMeertens 1 Introduction...

S. Doaitse Swierstra – författare

Visar alla böcker från författaren S. Doaitse Swierstra. Handla med fri frakt och snabb leverans.

6 produkter

Kategorier

6 produkter

Del 9325 - Lecture Notes in Computer Science
Programming Languages
19th Brazilian Symposium SBLP 2015, Belo Horizonte, Brazil, September 24-25, 2015, Proceedings
AvAlberto Pardo,S. Doaitse Swierstra
Häftad, Engelska, 2015
460 kr
Skickas inom 10-15 vardagar
This book constitutes the proceedings of the 19th Brazilian Symposium on Progamming Languages, SBLP 2015, held in Belo Horizonte, Brazil, in September 2015. The 10 papers presented in this volume were carefully reviewed and selected from 26 submissions. They deal with fundamental principles and innovations in the design and implementation of programming languages and systems.
Programming Languages
19th Brazilian Symposium SBLP 2015, Belo Horizonte, Brazil, September 24-25, 2015, Proceedings
AvS. Doaitse Swierstra,Alberto Pardo
E-bok
PDF, Engelska, 2015
571 kr
Läs direkt efter köp
This book constitutes the proceedings of the 19th Brazilian Symposium on Progamming Languages, SBLP 2015, held in Belo Horizonte, Brazil, in September 2015.
The 10 papers presented in this volume were carefully reviewed and selected from 26 submissions. They deal with fundamental principles and innovations in the design and implementation of programming languages and systems.
Advanced Functional Programming
Third International School, AFP''98, Braga, Portugal, September 12-19, 1998, Revised Lectures
AvJose N. Oliveira,Pedro R. Henriquesm. fl.
E-bok
PDF, Engelska, 2006
739 kr
Läs direkt efter köp
Programming Languages and Systems
8th European Symposium on Programming, ESOP''99 Held as Part of the Joint European Conferences on Theory and Practice of Software, ETAPS''99, Amsterdam, The Netherlands, March 22-28, 1999 Proceedings
AvS. Doaitse Swierstra
E-bok
PDF, Engelska, 2003
739 kr
Läs direkt efter köp
This is the second time that of ESOP has formed part of the ETAPS cluster of conferences, workshops, working group meetings and other associated activities. One of the results of colocatingso many conferences is a reduction in the number of possibilities to submit a paper to a European conference and the increased competition between conferences that occurs when boundaries between indiv- ual conferences have not yet become well established. This may have been the reason for the fact that only 44 submission were received this year. On the other hand we feel that the average quality of submissions has gone up, and thus the program committee was able to select 18 good papers, only one less than the year before. The program committee did not meet physically, and all discussion was done usinga Web-driven data base system. Despite some mixed feelings there is an overall tendency to appreciate the extra time available for giving papers a s- ond look and really going into comments made by other program committee members. I want to thank my fellow program committee members for the work they have put into the refereeingprocess and the valuable feedback they have given to authors. I want to thank the referees for their work and many detailed comments, and ?nally I want to thank everyone who has submitted a paper: without authors, no conference.
Programming Languages and Systems
8th European Symposium on Programming, ESOP'99 Held as Part of the Joint European Conferences on Theory and Practice of Software, ETAPS'99, Amsterdam, The Netherlands, March 22-28, 1999 Proceedings
AvS. Doaitse Swierstra
Häftad, Engelska, 1999
573 kr
Skickas inom 10-15 vardagar
This is the second time that of ESOP has formed part of the ETAPS cluster of conferences, workshops, working group meetings and other associated activities. One of the results of colocatingso many conferences is a reduction in the number of possibilities to submit a paper to a European conference and the increased competition between conferences that occurs when boundaries between indiv- ual conferences have not yet become well established. This may have been the reason for the fact that only 44 submission were received this year. On the other hand we feel that the average quality of submissions has gone up, and thus the program committee was able to select 18 good papers, only one less than the year before. The program committee did not meet physically, and all discussion was done usinga Web-driven data base system. Despite some mixed feelings there is an overall tendency to appreciate the extra time available for giving papers a s- ond look and really going into comments made by other program committee members. I want to thank my fellow program committee members for the work they have put into the refereeingprocess and the valuable feedback they have given to authors. I want to thank the referees for their work and many detailed comments, and ?nally I want to thank everyone who has submitted a paper: without authors, no conference.
Advanced Functional Programming
Third International School, AFP'98, Braga, Portugal, September 12-19, 1998, Revised Lectures
AvS. Doaitse Swierstra,Pedro R. Henriquesm. fl.
Häftad, Engelska, 1999
573 kr
Skickas inom 10-15 vardagar
Inthisvolumeyouwill?ndthelecturenotescorrespondingtothepres- rd tationsgivenatthe3 summerschoolonAdvancedFunctionalProgramming, heldinBraga,PortugalfromSeptember12-19,1998. ThisschoolwasprecededbyearlieronesinB?astad(1995,Sweden,LNCS925) andOlympia,WA(1996,USA,LNCS1129). Thegoalofthisseriesofschoolsis tobringrecentdevelopmentsintheareaoffunctionalprogrammingtoalarge groupofstudents. Thenotesarepublishedinordertoenableindividuals,small studygroups,andlecturerstobecomeacquaintedwithrecentworkinthefast developingareaoffunctionalprogramming. Whatmadethisschoolparticularlyinterestingwasthefactthatalllectures introducedusefulsoftware,thatwasusedbythestudentsintheclassestoget hands-onexperiencewiththesubjectstaught. Weurgereadersofthisvolumeto downloadthelatestversionofthissoftwarefromtheInternetandtrytodothe exercisesfromthetextthemselves;theproofoftheprogramisinthetyping. The?rstlecture,onSortingMorphisms,servesasagentleintroductiontothe thingstocome. Ifyouhavealwaysbeenafraidoftheword"morphism",andyou havebeenwonderingwhatcatamorphisms,anamorphisms,hylomorphims,and paramorphimswereabout,thisisthepapertoread?rst;youwilldiscoverthat theyaremerelynamesforrecursionpatternsthatoccuroverandoveragainwhen writingfunctionalprograms.Thealgorithmsinthepaperareallaboutsorting, andsinceyouarelikelytoknowthosealgorithmsbyheartalready,seeingthem structuredandanalyzedinanovelwayshouldserveasamotivationtoreadon tothesecondlecture. Thesecondlecture,onGenericProgramming,isalmostabookinabook. ThenotescanbeseenastheculminatingpointoftheSTOP-project,sponsored bytheDutchgovernmentattheendofthe80'sandthebeginningofthe90's. Its overallgoalwasthedevelopmentofacalculationalwayofderivingprograms. The projecthasprovideddeeperinsightintorealfunctionalprogrammingandinto thetheorybehindmanythingscommonlywrittenbyfunctionalprogrammers. Oneofthemainachievementsoftheprojecthasbeentomakepeopleaware ofthefactthatmanyalgorithmscanbedescribedinadata-independentway. ThePolyPsystemintroducedinthesenotesisoneofthetranslationstothe Haskell-worldofthistheoreticalunderpinning. Thethirdlecture,onGenericProgramTransformation,canalsobeseenas anapplicationofthetheoryintroducedinlecturetwo. Manye?ciency-improving programtransformationscanbeperformedinamechanicalway,andthesewould nothavebeenpossiblewithoutinsightintothecorrectnessofsuchtransfor- tionsgainedinthelectureonGenericProgramming.Thefourthlecture,onDesigningandImplementingCombinatorLanguages, introducesaneasytowriteformalismforwritingdownthecatamorphismsint- ducedinearlierchapters. Itisshownhowquitecomplicatedcatamorphisms,that at?rstsightseemratherforbiddingbymakingextensiveuseofhigher-orderdo- VI Preface mains,canactuallybedevelopedinastep-wisefashion,usinganattributegr- marview;itisfurthermoreshownhowtorelatethiswayofprogrammingwith conceptsfromtheobject-orientedworldthusmakingclearwhatthestrengths andweaknessesofeachworldare. The?fthlecture,titledUsingMetaML:AStagedProgrammingLanguage, introducestheconceptofpartialevaluation. Itservesasanotherinstanceof thequestfor"themostgenericofwritingprogramsatthelowestcost". The stagingtechniquesshowhowcoststhatwereintroducedbyaddingextralevels ofabstraction,maybemovedfromrun-timetocompile-time. Ithasbeencommonknowledgetousersofmodernfunctionallanguagesthat thetypesystemcanbeagreathelpinshorteningprogramsandreducingerrors. Intheextremeonemightseeatypeasapredicatecapturingtheproperties ofanyexpressionwiththattype.InthesixthlectureonCayenne-Spiceup yourProgrammingwithDependentTypesitisshowninwhatdirectionfunctional languagesaremostlikelytodevelop,andwhatmaybeexpectedofthenewtype systemstobeintroduced. Thelastlecture,titledHaskellasanAutomationController,showsthat writingfunctionalprogramsdoesnothavetoimplythatoneisboundtoremain isolatedfromtherestoftheworld. Beingabletocommunicatewithsoftware writtenbyothersinauniformway,isprobablyoneofthemostinteresting newdevelopmentsincurrentcomputerscience. Itappearsthattheconceptofa monadtogetherwiththeHaskelltypingrules,isquiteadequatetodescribethe interfacebetweenHaskellprogramsandtheouterworld. Finallywewanttothankeveryonewhocontributedtothisschoolandmade itsuchasuccessfulevent:sponsors,localsystemmanagers,localorganizers, students,andlastbutnotleastthelecturers. Weareconvincedthateveryone presentattheschoolenjoyedthiseventasmuchaswedid,andweallhopethat youwillfeelsomeofthespiritofthiseventwhenstudyingtheselecturenotes.March1999 DoaitseSwierstra PedroHenriques Jos'eOliveira VII Sponsorship Theschoolhasreceivedgeneroussponsorshipfrom: FCT-Fundac",aoparaaCienciaeTecnologia,Minist'eriodaCienciae Tecnologia AdegaCooperativadePontedeLima AgenciaAbreu CGD-CaixaGeraldeDep'ositos CIUM-CentrodeInform'aticadaUniversidadedoMinho DI-DepartamentodeInform'aticadaUniversidadedoMinho GEPL-GrupodeEspeci?cac",aoeProcessamentodeLinguagens LESI-Direc,c"aodeCursodeEngenhariadeSistemaseInform'atica Enabler Lactolima Latic'?niosdasMarinhas,Lda NovabasePorto-SistemasdeInforma,c"aoSA PrimaveraSoftware ProjectoCamila-GrupodeM'etodosFormais Sidereus-SistemasdeInforma,c"aoeConsultoriaInformat'icaLda SIBS-SociedadeInterbanc'ariadeServico,s VieiradeCastro LocalCommittee: Jos'eAlmeida,Minho Lu'?sBarbosa,Minho Jos'eBarros,Minho M. Joao " Frade,Minho PedroHenriques,Minho F. M'arioMartins,Minho F. LuisNeves,Minho CarlaOliveira,Minho JorgePinto,Lix JorgeRocha,Minho CesarRodrigues,Minho Joa"oSaraiva,Minho M. Joa"s. Its overallgoalwasthedevelopmentofacalculationalwayofderivingprograms. The projecthasprovideddeeperinsightintorealfunctionalprogrammingandinto thetheorybehindmanythingscommonlywrittenbyfunctionalprogrammers.Oneofthemainachievementsoftheprojecthasbeentomakepeopleaware ofthefactthatmanyalgorithmscanbedescribedinadata-independentway. ThePolyPsystemintroducedinthesenotesisoneofthetranslationstothe Haskell-worldofthistheoreticalunderpinning. Thethirdlecture,onGenericProgramTransformation,canalsobeseenas anapplicationofthetheoryintroducedinlecturetwo. Manye?ciency-improving programtransformationscanbeperformedinamechanicalway,andthesewould nothavebeenpossiblewithoutinsightintothecorrectnessofsuchtransfor- tionsgainedinthelectureonGenericProgramming. Thefourthlecture,onDesigningandImplementingCombinatorLanguages, introducesaneasytowriteformalismforwritingdownthecatamorphismsint- ducedinearlierchapters. Itisshownhowquitecomplicatedcatamorphisms,that at?rstsightseemratherforbiddingbymakingextensiveuseofhigher-orderdo- VI Preface mains,canactuallybedevelopedinastep-wisefashion,usinganattributegr- marview;itisfurthermoreshownhowtorelatethiswayofprogrammingwith conceptsfromtheobject-orientedworldthusmakingclearwhatthestrengths andweaknessesofeachworldare. The?fthlecture,titledUsingMetaML:AStagedProgrammingLanguage, introducestheconceptofpartialevaluation.Itservesasanotherinstanceof thequestfor"themostgenericofwritingprogramsatthelowestcost". The stagingtechniquesshowhowcoststhatwereintroducedbyaddingextralevels ofabstraction,maybemovedfromrun-timetocompile-time. Ithasbeencommonknowledgetousersofmodernfunctionallanguagesthat thetypesystemcanbeagreathelpinshorteningprogramsandreducingerrors. Intheextremeonemightseeatypeasapredicatecapturingtheproperties ofanyexpressionwiththattype. InthesixthlectureonCayenne-Spiceup yourProgrammingwithDependentTypesitisshowninwhatdirectionfunctional languagesaremostlikelytodevelop,andwhatmaybeexpectedofthenewtype systemstobeintroduced. Thelastlecture,titledHaskellasanAutomationController,showsthat writingfunctionalprogramsdoesnothavetoimplythatoneisboundtoremain isolatedfromtherestoftheworld. Beingabletocommunicatewithsoftware writtenbyothersinauniformway,isprobablyoneofthemostinteresting newdevelopmentsincurrentcomputerscience. Itappearsthattheconceptofa monadtogetherwiththeHaskelltypingrules,isquiteadequatetodescribethe interfacebetweenHaskellprogramsandtheouterworld.Finallywewanttothankeveryonewhocontributedtothisschoolandmade itsuchasuccessfulevent:sponsors,localsystemmanagers,localorganizers, students,andlastbutnotleastthelecturers. Weareconvincedthateveryone presentattheschoolenjoyedthiseventasmuchaswedid,andweallhopethat youwillfeelsomeofthespiritofthiseventwhenstudyingtheselecturenotes. March1999 DoaitseSwierstra PedroHenriques Jos'eOliveira VII Sponsorship Theschoolhasreceivedgeneroussponsorshipfrom: FCT-Fundac"caoparaaCienciaeTecnologia,Minist'eriodaCienciae Tecnologia AdegaCooperativadePontedeLima AgenciaAbreu CGD-CaixaGeraldeDep'ositos CIUM-CentrodeInform'aticadaUniversidadedoMinho DI-DepartamentodeInform'aticadaUniversidadedoMinho GEPL-GrupodeEspeci?cac"caoeProcessamentodeLinguagens LESI-Direccc"aodeCursodeEngenhariadeSistemaseInform'atica Enabler Lactolima Latic'?niosdasMarinhas,Lda NovabasePorto-SistemasdeInformacc"aoSA PrimaveraSoftware ProjectoCamila-GrupodeM'etodosFormais Sidereus-SistemasdeInformacc"aoeConsultoriaInformat'icaLda SIBS-SociedadeInterbanc'ariadeServicocs VieiradeCastro LocalCommittee: Jos'eAlmeida,Minho Lu'?sBarbosa,Minho Jos'eBarros,Minho M. Joao " Frade,Minho PedroHenriques,Minho F. M'arioMartins,Minho F.LuisNeves,Minho CarlaOliveira,Minho JorgePinto,Lix JorgeRocha,Minho CesarRodrigues,Minho Joa"oSaraiva,Minho M. Joa"oVaranda,Minho IX TableofContents SortingMorphisms...1 LexAugusteijn 1 Introduction...1 2 MorphismsonLists...2 2. 1 TheListCatamorphism...2 2. 2 TheListAnamorphism...4 2. 3 TheListHylomorphism...5 2. 4 InsertionSort...6 2. 5 SelectionSorts...7 3 LeafTrees...9 3. 1 TheLeaf-TreeCatamorphism...9 3. 2 TheLeaf-TreeAnamorphism...10 3. 3 TheLeaf-TreeHylomorphism...11 3. 4 MergeSort...12 4 BinaryTrees...13 4. 1 TheTreeCatamorphism...13 4. 2 TheTreeAnamorphism...14 4. 3 TheTreeHylomorphism...14 4. 4 Quicksort...15 4. 5 HeapSort...16 5 Paramorphisms...18 5. 1 TheListParamorphism...18 5. 2 InsertAsParamorphism...18 5. 3 RemoveAsParamorphism...19 6 GeneralizingDataStructures...20 6. 1 GeneralizingQuicksort...20 6. 2 GeneralizingHeapSort...21 7 Conclusions...23 GenericProgramming-AnIntroduction-...28 RolandBackhouse,PatrikJansson,JohanJeuring,LambertMeertens 1 Introduction...

S. Doaitse Swierstra – författare

Programming Languages

Programming Languages

Advanced Functional Programming

Programming Languages and Systems

Programming Languages and Systems

Advanced Functional Programming

S. Doaitse Swierstra – författare

Programming Languages

Programming Languages

Advanced Functional Programming

Programming Languages and Systems

Programming Languages and Systems

Advanced Functional Programming