delphi language features which fpc does not have
Note: some of new Delphi features are already implemented in FPC trunk.
New since Delphi 2007
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
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)
New since Delphi 2010
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 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:
Already implemented in FPC 2.6.0.
- (Library) packages
- "automated" keyword, which is like "public", but generates COM specific RTTI. Afaik this kind of COM usage is deprecated though.