Difference between revisions of "Delphi language features missing from the Free Pascal Compiler"

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==== Class Helpers ====
 
==== Class Helpers ====
 
==== Records with Methods ====
 
==== Records with Methods ====
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==== Class Variables, Types and Consts, Class Properties, Static Class Methods ====
 
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<delphi>
 
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program ClassTest;
 
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{$APPTYPE CONSOLE}
 
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type
 
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  TSomeClass = class
 
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  private
 
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    type
 
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      TSomeType = type integer;    // an internal type
 
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    class var
 
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      FSomeClassVar: TSomeType;    // class variable belongs to class, not an instance
 
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    var
 
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      FSomeIntanceVar: TSomeType;  // instance variable belongs to instance. it is a usual field
 
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    class procedure SetSomeClassVar(const AValue: TSomeType); static;
 
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  public
 
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    class property SomeProperty: TSomeType read FSomeClassVar write SetSomeClassVar; // class property - belongs to class
 
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    property SomeInstanceProp: TSomeType read FSomeIntanceVar;
 
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  end;
 
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{ TSomeClass }
 
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class procedure TSomeClass.SetSomeClassVar(const AValue: TSomeType);
 
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begin
 
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  FSomeClassVar := AValue;
 
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end;
 
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var
 
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  SomeClass: TSomeClass;
 
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begin
 
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  SomeClass.SomeProperty := 1;
 
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  WriteLn(SomeClass.SomeProperty);
 
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end.
 
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</delphi>
 
  
 
== New since Delphi 2009 ==
 
== New since Delphi 2009 ==

Revision as of 12:17, 11 January 2010

New since Delphi 2007

Operator Overloading Syntax for records and classes

Info: http://docwiki.embarcadero.com/RADStudio/en/Operator_Overloading http://wiert.wordpress.com/2009/10/19/delphi-operator-overloading-table-of-operators-names-and-some-notes-on-usage-and-glitches/

Class Helpers

Records with Methods

New since Delphi 2009

Generics Syntax

Unicode string support

Anonymouse Methods

New since Delphi 2010

Custom Attributes

Enhanced RTTI

Class constructors and destructors

http://blogs.embarcadero.com/abauer/2009/09/03/38898

Delayed directive

Info is here: http://docwiki.embarcadero.com/RADStudio/en/Libraries_and_Packages#Delayed_Loading Some info about internals:

  1. http://blogs.embarcadero.com/abauer/2009/08/25/38894
  2. http://blogs.embarcadero.com/abauer/2009/08/29/38896
  3. http://blogs.embarcadero.com/chrishesik/2009/11/02/35056

fpc wiki about that topic: http://wiki.freepascal.org/Dynamically_loading_headers

AS and IS extended for interfaces

Info is here:

  1. http://docwiki.embarcadero.com/RADStudio/en/Interface_References#Casting_Interface_References_to_Objects
  2. http://blogs.embarcadero.com/abauer/2009/08/21/38893

Misc:

  1. {$SCOPEDENUMS ON} directive which allows to use enumeration name before the item. Example:

<delphi> type 

 TColor = (red, green, blue);

begin 

 WriteLn(ord(TColor.red));

end; </delphi>

  1. {$pointermath ON} directive which turns on pointer arithmetic.

Reference

  1. http://edn.embarcadero.com/article/34324
  2. http://edn.embarcadero.com/article/images/39076/New_Delphi_Coding_Styles_and_Architectures.pdf
  3. http://docwiki.embarcadero.com/RADStudio/en/What's_New_in_Delphi_and_C%2B%2BBuilder_2010
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