Difference between revisions of "Delphi language features missing from the Free Pascal Compiler"
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Paul Ishenin (talk | contribs) |
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fpc wiki about that topic: http://wiki.freepascal.org/Dynamically_loading_headers | fpc wiki about that topic: http://wiki.freepascal.org/Dynamically_loading_headers | ||
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+ | 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) | ||
==== AS and IS extended for interfaces ==== | ==== AS and IS extended for interfaces ==== |
Revision as of 15:45, 18 January 2013
Note: some of 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
New since Delphi 2010
Custom Attributes
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:
- http://blogs.embarcadero.com/abauer/2009/08/25/38894
- http://blogs.embarcadero.com/abauer/2009/08/29/38896
- http://blogs.embarcadero.com/chrishesik/2009/11/02/35056
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.--Paul Ishenin 13:45, 18 January 2013 (UTC)
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.
Misc
- (Library) packages
- "automated" keyword, which is like "public", but generates COM specific RTTI. Afaik this kind of COM usage is deprecated though.