BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Interfaces again: GetItem differs from declaration in interf          BorlandTalk.com Forum Index -> Delphi OO design View previous topic :: View next topic   Author Message Andrea Raimondi Guest Posted: Mon Dec 27, 2004 11:58 am    Post subject: Interfaces again: GetItem differs from declaration in interf Hey Peers, It seems I'm missing something trivial here. The IList implementation compiles fine, but IAttributeList one isn't willing to work whatever I'm doing. This is my IList implementation interface(compiles fine): TConcreteList = class( TInterfacedObject, IList ) private FIntfList : TInterfaceList; protected procedure AddItem(AnItem: IListItem);overload;virtual; procedure AddItem( AStream : TStream );overload;virtual;abstract; procedure AddItem( AString : String );overload;virtual;abstract; function GetAsString: String;virtual;abstract; function GetCount: Integer; function GetIListItem(Index: Integer): IListItem; // Method resolution for IList function IList.GetItem = GetIListItem; public procedure AfterConstruction;override; destructor Destroy;override; end; The basic idea is that I'll manage my interface list with TInterfaceList class. Now, I have this class which implements an attribute list: TAttributeList = class( TConcreteList, IList, IAttributeList ) protected procedure AddItem(AnItem: IAttribute);overload; procedure AddItem( AStream : TStream );overload;override; procedure AddItem( AString : String );overload;override; function GetAsString: String;override; function GetItem(Index: Integer): IAttribute; end; Compiler complains about the error message in subject. I think I'm missing something very very basic but I've no clue what. Any help? TIA, Andrew -- Online thoughts blog http://araimondi.blogspot.com Back to top Joanna Carter (TeamB) Guest Posted: Mon Dec 27, 2004 12:06 pm    Post subject: Re: Interfaces again: GetItem differs from declaration in in "Andrea Raimondi" <rainaple (AT) tin (DOT) it> a écrit dans le message de news: 41cff78b$1 (AT) newsgroups (DOT) borland.com... Quote: TAttributeList = class( TConcreteList, IList, IAttributeList ) protected procedure AddItem(AnItem: IAttribute);overload; procedure AddItem( AStream : TStream );overload;override; procedure AddItem( AString : String );overload;override; function GetAsString: String;override; function GetItem(Index: Integer): IAttribute; end; Compiler complains about the error message in subject. I think I'm missing something very very basic but I've no clue what. Yes, don't include IList in the declaration of TAttributeList and also you may have to mark both the base and derived GetItem methods as overload. Joanna -- Joanna Carter (TeamB) Consultant Software Engineer TeamBUG support for UK-BUG TeamMM support for ModelMaker Back to top Andrea Raimondi Guest Posted: Mon Dec 27, 2004 1:55 pm    Post subject: Re: Interfaces again: GetItem differs from declaration in in Joanna Carter (TeamB) wrote: Quote: Yes, don't include IList in the declaration of TAttributeList and also you may have to mark both the base and derived GetItem methods as overload. This is the new declaration: TAttributeList = class( TConcreteList, IAttributeList ) private function GetItem(Index: Integer): IAttribute; protected procedure AddItem(AnItem: IAttribute);overload; procedure AddItem( AStream : TStream );overload;override; procedure AddItem( AString : String );overload;override; function GetAsString: String;override; function GetAttributeItem(Index: Integer): IAttribute; function IAttributeList.GetItem = GetAttributeItem; end; It only shows the same error, but it seems correct to me. Anything I may be doing wrong? Cheers, Quote: Joanna Andrew -- Online thoughts blog http://araimondi.blogspot.com Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi OO design All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.