Hi,

The correct way to use RegEx is like I'm showing below? (I saw this code in bugtracker)

uses
  RegEx;
procedure TForm1.Button1Click(Sender: TObject);
var
  VRegEx: TRegexEngine;
  VErrorCode: TRegexError;
  VOffset, VErrorPos, VMatchPos: Integer;
begin
  VRegEx := TRegexEngine.Create('[0-9]');
  try
    try
      VErrorPos := 0;
      VMatchPos := 0;
      VErrorCode := recNone;
      if VRegEx.Parse(VErrorPos, VErrorCode) then
      begin
        VOffset := 1; //<<<------ I use 1 or 0 here? :/
        if VRegEx.MatchString('ABC123', VMatchPos, VOffset) then
          ShowMessage('Match')
        else
          ShowMessage('No Match');
      end
      else
        ShowMessage('Parse Failed');
    except
      on E: Exception do
        ShowMessage('RegEx ERROR: ' + E.Message);
    end;
  finally
    VRegEx.Free;
  end;
end;

Thx.

silvioprog wrote

Hi, The correct way to use RegEx is like I'm showing below? (I saw this code in bugtracker)

   regex1 := TRegExpr.Create;
   regex1.Expression := pattern1;
   with regex1 do begin
     if Exec(test1) then begin
       WriteLn('match');
     end else
       WriteLn('no match');

2011/12/22 Mark Morgan Lloyd :

I can not use the LCL.

silvioprog wrote

I can not use the LCL.

What has regex and LCL have to do with each other? Why do you think regex requires LCL? I have many apps that use regex, and none of the depend on LCL.

Regexpr is documented in the wiki:

http://wiki.lazarus.freepascal.org/Regexpr

I recommend using the sorokin version.

Graeme Geldenhuys wrote

On 22 December 2011 21:25, silvioprog wrote:>> I can not use the LCL. What has regex and LCL have to do with each other? Why do you thinkregex requires LCL? I have many apps that use regex, and none of thedepend on LCL.

I was, in retrospect, slightly out of order in using an example for Sorokin rather than the "old" one. But I too fail to see what the OP is grounding his concern on, unless he assumes that write() and writeln() are part of the LCL.

2011/12/23 Graeme Geldenhuys :

The regex that he indicated uses LCL yes! >> "[LCL]SynRegExpr.TRegExpr".

The regex that I'm using belongs to FCL. >> "[FCL]RegEx.TRegexEngine".

TRegExpr (unit RegExpr) is also part of FCL in 2.7.1 since some weeks/months.

Regards,
Sven

2011/12/23 Sven Barth :

I'm using FPC 2.4.4. :(

My RegExpr unit: http://pastebin.com/N2ARAcx1

I followed this sample:

http://bugs.freepascal.org/view.php?id=14236

silvioprog wrote

The regex that he indicated uses LCL yes! >> "[LCL]SynRegExpr.TRegExpr".

Look inside that unit. It is the TRegExpr library originally created by Andrey V. Sorokin for Delphi. It has no dependency on LCL units at all, only the RTL. Simply copy that unit into your project, give it a better name and use it. It is a lot more powerful and feature complete, compare to what comes with any released FPC.

The regex that I'm using belongs to FCL. >> "[FCL]RegEx.TRegexEngine".

As far as I remember the regex unit included in FCL (released versions of FPC) is pretty limited in what it can do. I would not use that for any regex project. Use the TRegExpr library instead.

Only recently did someone include a more powerful regex engine in FPC trunk - but I don't know how that one compares to the one from Andrey V. Sorokin.

2011/12/23 Graeme Geldenhuys :

I saw. Although TRegExpr be in the folder of Lazarus, it don't depend of LCL. Perfect! :)

Thanks for your helpful. ^^

It is the Sorokin one that was included, see here: http://svn.freepascal.org/cgi-bin/viewvc.cgi?view=rev&revision=18891

Regards,
Sven

August 29th, pulled up into 2.5.1/2.6.0 about a month later.

With the caveat that fixes might get applied to one or the other. For example I see that Ludo's fix for
http://mantis.freepascal.org/view.php?id=20806 (plus at least one alignment issue) is in FPC 19759 but not in Lazarus 34371.

Maybe 2.4.4 support for Lazarus (trunk) will be dropped once 2.6.0 is released and then the variant distributed with Lazarus can be removed.

Regards,
Sven

Better done sooner than later since there's very little divergence between the two variants so far- a couple of alignment/widestring fixes in the FPC one, and an extra block of definitions at the start of the Lazarus/Synedit one.

When 2.6.0 is out, and since 2.4.2+ etc support deprecated fine, I would simply deprecate the lazarus sorokin unit.

That gives a signal to users to convert using the FPC one, while not forcing them to do it immediately (or if they are still using 2.4.2/2.4.4, which probably will be packaged with distributions for a while)

I think the first step is to add FPC 2.6 to the Installer package (at least on Windows). On Linux, I always download the "recomended" version: http://sourceforge.net/projects/lazarus/files/Lazarus%20Linux%20i386%20DEB/Lazarus%200.9.30.2/ as you can see, it?s offered two versions of FPC and that?s the version i?ll use...
________________________________
William de Oliveira Ferreira
Bacharel em Sistemas de Informa??o

2011/12/23 Marco van de Voort

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