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

Revision as of 08:44, 29 June 2013

Note: some new Delphi features are already implemented in FPC trunk.

New since Delphi 2007

Advanced Records

http://docwiki.embarcadero.com/RADStudio/en/Structured_Types#Records_.28advanced.29

Advanced records are implemented in FPC 2.6.X without record constructors. Record constructors are implemented in FPC 2.7.1 (trunk).

New since Delphi 2009

Generics Syntax

A good delphi reference is here: http://docwiki.embarcadero.com/RADStudio/en/Generics_Index

Partially implemented in 2.5.1/2.6.x, further improved in 2.7.1 by Sven

Support for ansistrings with a definable codepage

Initial implementation available in trunk (2.7.1). Useful for small time testing, but the whole of the codebase hasn't adapted (2011-10-18)

Anonymous Methods

http://docs.embarcadero.com/products/rad_studio/delphiAndcpp2009/HelpUpdate2/EN/html/devcommon/anonymousmethods_xml.html

New since Delphi 2010

Custom Attributes

To do: description here

Enhanced RTTI

http://docwiki.embarcadero.com/RADStudio/en/RTTI_directive_(Delphi)

Delayed directive

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

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

Originally I thought that delayed is similar to weakexternal which FPC has for some platforms but after reading this: http://docwiki.embarcadero.com/CodeExamples/XE3/en/DelayedLoading_(Delphi) I understand that this is simply a wrapper around LoadLibrary and GetProcessAdress with automatic loading and unloading.--Paul Ishenin 13:45, 18 January 2013 (UTC)

Misc

(Library) packages
"automated" keyword, which is like "public", but generates COM specific RTTI. Afaik this kind of COM usage is deprecated though.

Already implemented

FPC 2.7.1/trunk

Advanced records

See above.

FPC 2.6.0

AS and IS extended for interfaces

Info is here:

Implemented in FPC 2.6.0.

Reference

@@ Line 1: / Line 1: @@
-Note: some of new Delphi features are already implemented in [[FPC_New_Features_Trunk|FPC trunk]].
+Note: some new Delphi features are already implemented in [[FPC_New_Features_Trunk|FPC trunk]].
 == New since Delphi 2007 ==
@@ Line 26: / Line 26: @@
 == New since Delphi 2010 ==
 ==== Custom Attributes ====
+'''To do: description here'''
 ==== Enhanced RTTI ====
 http://docwiki.embarcadero.com/RADStudio/en/RTTI_directive_(Delphi)
@@ Line 39: / Line 40: @@
 fpc wiki about that topic: http://wiki.freepascal.org/Dynamically_loading_headers
-Originally I thought that delayed is similar to weakexternal which FPC has for some platforms but after reading this: http://docwiki.embarcadero.com/CodeExamples/XE3/en/DelayedLoading_(Delphi) I undersatnd that this is simple a wrapped around LoadLibrary and GetProcessAdress with automatic loading and unloading.--[[User:Paul Ishenin|Paul Ishenin]] 13:45, 18 January 2013 (UTC)
+Originally I thought that delayed is similar to weakexternal which FPC has for some platforms but after reading this: http://docwiki.embarcadero.com/CodeExamples/XE3/en/DelayedLoading_(Delphi) I understand that this is simply a wrapper around LoadLibrary and GetProcessAdress with automatic loading and unloading.--[[User:Paul Ishenin|Paul Ishenin]] 13:45, 18 January 2013 (UTC)
+== Misc ==
+# [[packages|(Library) packages]]
+# "automated" keyword, which is like "public", but generates COM specific RTTI. Afaik this kind of COM usage is deprecated though.
+== Already implemented ==
+=== FPC 2.7.1/trunk ===
+==== Advanced records ====
+See above.
+=== FPC 2.6.0 ===
 ==== AS and IS extended for interfaces ====
 Info is here:
 #http://docwiki.embarcadero.com/RADStudio/en/Interface_References#Casting_Interface_References_to_Objects
 #http://blogs.embarcadero.com/abauer/2009/08/21/38893
-Already implemented in FPC 2.6.0.
+Implemented in FPC 2.6.0.
-== Misc ==
-# [[packages|(Library) packages]]
-# "automated" keyword, which is like "public", but generates COM specific RTTI. Afaik this kind of COM usage is deprecated though.
 == Reference ==