How to install DWSScript

Question

I am having trouble installing DWSScript component. I am using Delphi XE2 and when I try to compile the dwsLibRuntime.dpk I get an error ( Array type required ). I am using the latest DWScript source pulled from the project's svn repo.

What am I doing wrong?

 toStr:=TStringListCracker(sl).FList[i].FString; //produces error
 System.MonitorExit(sl);

@DavidHeffernan i mentioned that i am using delphi xe 2 ;) what can i do in this case ? — opc0de
Are you sure you are compiling with XE2? I can see that the implementation of TStringList has changed (certainly between 2010 and XE2) in a way that would explain that error. — David Heffernan
As a complete aside, does anyone know why this code feels the need to poke around with the private implementation details of TStringList? — David Heffernan
@David: it's a speed optimization, it removes a complex call, a range check, an UStrAsg and accompanying bus lock from a critical section, along with an implicit exception frame in UnifyAssignString (used to guard the return value of the Get) and reduce register pressure in UnifyAssignString. Speedup is a few percent points in single-threaded situations up to 20-30% in some heavily multi-threaded scenarios. Just look at the code in the CPU view between the cracker-hack and the "toStr:=sl[i]" variant. — Eric Grange

Eric Grange Eric Grange · Accepted Answer · 2012-03-27T09:53:35

You're not using the latest version, the monitor isn't used anymore (due to contention bugs in the RTL implementation), the second line should read as "sl.FLock.Leave;". You're likely on a pre-Delphi XE2 version, as the Monitor was dropped in february 2011.

http://code.google.com/p/dwscript/source/browse/trunk/Source/dwsUtils.pas#475

Make sure you're on the head/trunk, or Delphi isn't pointed to a different directory than the one updated by your SVN client.

How to install DWSScript

2 Answers