[fpc-pascal] Record Method and Operators

Cesar Romero cesarliws at gmail.com
Wed Oct 22 15:31:51 CEST 2008


Hi,

Im wondering if FPC Team have plans to support Record Methods/Operators 
in future versions of FPC
I read the actual "Future plans" and the most closed item is "RTL:: More 
compatibility with later Delphi versions."
But it do not means that records can be changed.

I want to implement my ValueTypes using record with implicit operators 
and constructor/destructor, like this code written by a friend, Lee Nover.

 TSpecifier = record
   S: AnsiString;
   WS: WideString;
   Intf: IInterface;

   class operator Implicit(const S: AnsiString): TSpecifier;
   class operator Implicit(const C: Cardinal): TSpecifier;
   class operator Implicit(const D: Double): TSpecifier;
   class operator Implicit(const I: Integer): TSpecifier;
   class operator Implicit(const I64: Int64): TSpecifier;
   class operator Implicit(const V: TValue): TSpecifier;
   class operator Implicit(const WS: WideString): TSpecifier;
   class operator Implicit(const Intf: IInterface): TSpecifier;

   class operator Implicit(const Spec: TSpecifier): AnsiString;
   class operator Implicit(const Spec: TSpecifier): Cardinal;
   class operator Implicit(const Spec: TSpecifier): Double;
   class operator Implicit(const Spec: TSpecifier): Integer;
   class operator Implicit(const Spec: TSpecifier): Int64;
   class operator Implicit(const Spec: TSpecifier): TValue;
   class operator Implicit(const Spec: TSpecifier): WideString;
   class operator Implicit(const Spec: TSpecifier): IInterface;

   case NativeType: Integer of
     varInteger: (I: Integer);
     varInt64: (I64: Int64);
     varLongWord: (C: Cardinal);
     varDouble: (D: Double);
     varObject: (O: TValue);
 end;

My plans is to have a single framework compatible with Delphi 2007/2009 
and FPC, so Ill not use some D2009 only resources, but implicit 
operators make the live of users very better to write less and better code.

Can I have any hope about this subject?



-- 
Cesar Romero
http://blogs.liws.com.br/cesar
http://blogs.liws.com.br/cesar/?feed=rss2




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