BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Variable by Name Goto page 1, 2  Next          BorlandTalk.com Forum Index -> comp.lang.pascal.delphi.misc View previous topic :: View next topic   Author Message Mauro Magalhães Guest Posted: Sun Nov 23, 2003 12:36 am    Post subject: Variable by Name I need take a variable value passing variable name by reference. How can I do it? Example: Var Fator : Double; I need Fator value referencing as string "Fator". Thanks! Back to top Jud McCranie Guest Posted: Sun Nov 23, 2003 1:10 am    Post subject: Re: Variable by Name On 22 Nov 2003 16:36:18 -0800, [email]maurosm (AT) terra (DOT) com.br[/email] (Mauro Magalhães) wrote: Quote: I need take a variable value passing variable name by reference. How can I do it? Example: Var Fator : Double; I need Fator value referencing as string "Fator". Thanks! To pass a parameter by reference, put VAR before it in the procedure/function statement. Back to top Mauro Magalh?es Guest Posted: Mon Nov 24, 2003 2:19 am    Post subject: Re: Variable by Name Jud McCranie <j.mccranieNOSPAMMM (AT) adelphia (DOT) net> wrote Quote: On 22 Nov 2003 16:36:18 -0800, [email]maurosm (AT) terra (DOT) com.br[/email] (Mauro Magalhães) wrote: I need take a variable value passing variable name by reference. How can I do it? Example: Var Fator : Double; I need Fator value referencing as string "Fator". Thanks! To pass a parameter by reference, put VAR before it in the procedure/function statement. Sorry! I don´t want pass a parameter, I want take a variable value taking variable name. I need a way to search a variable into memory by name. Back to top Frank Andreas de Groot Guest Posted: Mon Nov 24, 2003 3:05 am    Post subject: Re: Variable by Name Use a class and use RTTY. "Mauro Magalh?es" <maurosm (AT) terra (DOT) com.br> wrote in message Quote: Sorry! I don´t want pass a parameter, I want take a variable value taking variable name. I need a way to search a variable into memory by name. Back to top Jud McCranie Guest Posted: Mon Nov 24, 2003 3:08 am    Post subject: Re: Variable by Name On 23 Nov 2003 18:19:06 -0800, [email]maurosm (AT) terra (DOT) com.br[/email] (Mauro Magalh?es) wrote: Quote: Sorry! I don´t want pass a parameter, I want take a variable value taking variable name. I need a way to search a variable into memory by name. I think if you have it generate a detailed MAP file, (options/linter tab) that might be what you want. Back to top Frank Andreas de Groot Guest Posted: Mon Nov 24, 2003 3:11 am    Post subject: Re: Variable by Name "Frank Andreas de Groot" wrote Quote: Use a class and use RTTY. Oops, that should be RTTI, Run-time Type information. Published properties are queryable by name at runtime. I've done it with the Font.Charset property. It's devilishly complicated and slow though and RTTI is not well documented. Back to top Nicholas Sherlock Guest Posted: Mon Nov 24, 2003 4:03 am    Post subject: Re: Variable by Name Jud McCranie wrote: Quote: On 23 Nov 2003 18:19:06 -0800, [email]maurosm (AT) terra (DOT) com.br[/email] (Mauro Magalh?es) wrote: Sorry! I don´t want pass a parameter, I want take a variable value taking variable name. I need a way to search a variable into memory by name. I think if you have it generate a detailed MAP file, (options/linter tab) that might be what you want. No, normal variable names are not recorded in the MAP file. If you use published properties of a class, they are stored. Otherwise, no. Cheers, Nicholas Sherlock Back to top Jud McCranie Guest Posted: Mon Nov 24, 2003 4:45 am    Post subject: Re: Variable by Name On Mon, 24 Nov 2003 17:03:51 +1300, "Nicholas Sherlock" <n_sherlock (AT) hotmail (DOT) com> wrote: Quote: No, normal variable names are not recorded in the MAP file. If you use published properties of a class, they are stored. Otherwise, no. For one thing, I didn't really understand what the OP was asking. These variables (StartDate, etc) are local variables to the unit that has VacReqForm, and they are listed in the map file. Am I misunderstanding something? 0002:001E370C VacReqForm 0002:001E3710 .2 0002:001E3714 StartDate 0002:001E371C EndDate 0002:001E3724 EarliestUnprinted 0002:001E372C VacRequestList Back to top Nicholas Sherlock Guest Posted: Mon Nov 24, 2003 6:32 am    Post subject: Re: Variable by Name Jud McCranie wrote: Quote: On Mon, 24 Nov 2003 17:03:51 +1300, "Nicholas Sherlock" [email]n_sherlock (AT) hotmail (DOT) com[/email]> wrote: No, normal variable names are not recorded in the MAP file. If you use published properties of a class, they are stored. Otherwise, no. For one thing, I didn't really understand what the OP was asking. These variables (StartDate, etc) are local variables to the unit that has VacReqForm, and they are listed in the map file. Am I misunderstanding something? 0002:001E370C VacReqForm 0002:001E3710 .2 0002:001E3714 StartDate 0002:001E371C EndDate 0002:001E3724 EarliestUnprinted 0002:001E372C VacRequestList Oops.. sorry, guess I got it wrong this time . OP - maybe if you told us what you needed this for we could give you more useful advice? (Along the lines of.. you don't actually need to access them by name..) Cheers, Nicholas Sherlock Back to top Mauro Magalh?es Guest Posted: Mon Nov 24, 2003 12:02 pm    Post subject: Re: Variable by Name "Nicholas Sherlock" <n_sherlock (AT) hotmail (DOT) com> wrote Quote: Jud McCranie wrote: On Mon, 24 Nov 2003 17:03:51 +1300, "Nicholas Sherlock" [email]n_sherlock (AT) hotmail (DOT) com[/email]> wrote: No, normal variable names are not recorded in the MAP file. If you use published properties of a class, they are stored. Otherwise, no. For one thing, I didn't really understand what the OP was asking. These variables (StartDate, etc) are local variables to the unit that has VacReqForm, and they are listed in the map file. Am I misunderstanding something? 0002:001E370C VacReqForm 0002:001E3710 .2 0002:001E3714 StartDate 0002:001E371C EndDate 0002:001E3724 EarliestUnprinted 0002:001E372C VacRequestList Oops.. sorry, guess I got it wrong this time . OP - maybe if you told us what you needed this for we could give you more useful advice? (Along the lines of.. you don't actually need to access them by name..) Cheers, Nicholas Sherlock I am trying to create a parser for a expression like Evaluate/Modify window, because I need get results from a expression that uses literal values, objects references and variable names. If you can help I will be happy. Thank you! Back to top J French Guest Posted: Mon Nov 24, 2003 1:27 pm    Post subject: Re: Variable by Name On 24 Nov 2003 04:02:50 -0800, [email]maurosm (AT) terra (DOT) com.br[/email] (Mauro Magalh?es) wrote: <snip> Quote: I am trying to create a parser for a expression like Evaluate/Modify window, because I need get results from a expression that uses literal values, objects references and variable names. If you can help I will be happy. In other words, you are writing an interpreter ? A few more details, or a simple example might help Back to top Mauro Magalh?es Guest Posted: Tue Nov 25, 2003 10:48 am    Post subject: Re: Variable by Name [email]erewhon (AT) nowhere (DOT) com[/email] (J French) wrote in message news:<3fc20663.275406624 (AT) news (DOT) btclick.com>... Quote: On 24 Nov 2003 04:02:50 -0800, [email]maurosm (AT) terra (DOT) com.br[/email] (Mauro Magalh?es) wrote: snip I am trying to create a parser for a expression like Evaluate/Modify window, because I need get results from a expression that uses literal values, objects references and variable names. If you can help I will be happy. In other words, you are writing an interpreter ? A few more details, or a simple example might help Yes, I need to write an expression evaluator like Delphi´s Evaluate/Modify window (ctrl F7). Something like this: '(2 * 4) / Fator', where "Fator" will assume the value of a variable passed to the expression. Regards, Mauro. Back to top Jud McCranie Guest Posted: Tue Nov 25, 2003 4:05 pm    Post subject: Re: Variable by Name On 25 Nov 2003 02:48:10 -0800, [email]maurosm (AT) terra (DOT) com.br[/email] (Mauro Magalh?es) wrote: Quote: Yes, I need to write an expression evaluator like Delphi´s Evaluate/Modify window (ctrl F7). Something like this: '(2 * 4) / Fator', where "Fator" will assume the value of a variable passed to the expression. That is called an "expression evaluator", and there are routines written for that. Back to top J French Guest Posted: Tue Nov 25, 2003 10:36 pm    Post subject: Re: Variable by Name On Tue, 25 Nov 2003 11:05:50 -0500, Jud McCranie <j.mccranieNOSPAMMM (AT) adelphia (DOT) net> wrote: Quote: On 25 Nov 2003 02:48:10 -0800, [email]maurosm (AT) terra (DOT) com.br[/email] (Mauro Magalh?es) wrote: Yes, I need to write an expression evaluator like Delphi´s Evaluate/Modify window (ctrl F7). Something like this: '(2 * 4) / Fator', where "Fator" will assume the value of a variable passed to the expression. That is called an "expression evaluator", and there are routines written for that. Some time ago there was a Russian guy advertising an interpreted Pascal in this (or a related NG) Personally I would write my own Back to top Jud McCranie Guest Posted: Wed Nov 26, 2003 1:46 am    Post subject: Re: Variable by Name On Tue, 25 Nov 2003 22:36:06 +0000 (UTC), [email]erewhon (AT) nowhere (DOT) com[/email] (J French) wrote: Quote: Some time ago there was a Russian guy advertising an interpreted Pascal in this (or a related NG) Personally I would write my own And I don't think you need to know the memory addresses at which the variables are stored, to do an expression evaluator. Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> comp.lang.pascal.delphi.misc All times are GMT Goto page 1, 2  Next Page 1 of 2   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.