• Support for Delphi 10.4

This library is very small and very simple. It is a simple include file which provides a set of $define symbols based on the Delphi version at compilation time to help with development of code that needs to support and adapt to multiple versions of Delphi.

Specific Delphi versions may be detected by testing for a $define corresponding to each version:

Delphi 1 thru 7	          : DELPHI1, DELPHI2, DELPHI3 .. DELPHI7
Delphi 8 is not supported
Delphi 2005 thru 2010      : DELPHI2005, DELPHI2006, DELPHI2007, DELPHI2009, DELPHI2010
                             (For Delphi 2006 and 2007, DELPHI2006_OR_2007 is also defined)
Delphi XE thru XE8         : DELPHIXE, DELPHIXE2 .. DELPHIXE8
Delphi 10 thru 10.n        : DELPHI10, DELPHI10_1 .. DELPHI10_n
                             (city names are also defined: SEATTLE, BERLIN, TOKYO, RIO etc)

So, for code that should only be compiled when compiling with Delphi 2010, you can write:

{$ifdef DELPHI2010}
  ..
{$endif}

Knowing that you are compiling with a specific Delphi version is less useful than knowing that the compiler is some version in a range of versions. In particular, changes in RTL functions are usually introduced at some point and then remain consistent from that point on, or are removed from some given version. To assist with such cases, additional $define symbols are provided to allow you to test for versions up to and including or later than some version of interest. These use pre and post-fix double-underscores (__) respectively.

e.g. for code that relies on compilation with any version of Delphi upto and including Delphi 2007:

{$ifdef __DELPHI2007}
  ..
{$endif}

Similarly, for code that relies on Delphi 2009 or later:

{$ifdef DELPHI2009__}
  ..
{$endif}

As well as the DELPHI10 or DELPHI10_x $defines, the corresponding city name symbols are defined for these versions:

  DELPHI10    ==    SEATTLE
__DELPHI10    ==  __SEATTLE 
  DELPHI10__  ==    SEATTLE__

etc

To use this library simply add a deltics.inc reference in your project .duget file and run duget update to obtain the latest version available in any of your feeds (duget.org is recommended).

The build pipeline for this package compiles a set of tests with every version of Delphi from version 2 onward. These tests use Smoketest 2.x to exercise the compiler defines introduced by the include file and compare them with the expected results based on the version of Delphi used to compile each set of tests.