RegExpr Error

[Grahame Grieve]

This program produces wrong output:

Code: Pascal  [Select][+][-]

1. program project1;
2.  
3. {$mode delphi }{$H+}
4. uses
5.   RegExpr;
6. var
7.   R:TRegExpr;
8.  
9. begin
10.   R := TRegExpr.Create;
11.   try
12.     R.Expression:= '^[A-Z]{2}$';
13.     writeln(R.Exec('US'));
14.     writeln(R.Exec('USA'));
15.   finally
16.     R.Free;
17.   end;
18.   readln;
19. end.    
20.  

The output is

Code: Text  [Select][+][-]

1. TRUE
2. TRUE
3.  

But it should be TRUE and then FALSE.

Is this a bug in TRegExpr?

Lazarus 2.2.7 (rev lazarus_2_2_6-1-gada7a90f86) FPC 3.2.3 aarch64-darwin-cocoa

[dseligo]

I got

Code: Text  [Select][+][-]

1. TRUE
2. FALSE

under FPC 3.2.2 in both Windows 11 and Debian 11.

[TRon]

I got the same result as dseligo with fpc 3.2.2 and trunk at Debian bookworm.

Could it be that your results are specific to 3.2.2 fixes ?

[Grahame Grieve]

Perhaps it is. I will investigate. Thanks

[paweld]

Code: [Select]

TRUE
FALSELazarus trunk + FPC 3.2.3 on Windows

[Jurassic Pork]

it is also OK for me on Mac OS Catalina 10.15 x86_64-darwin-cocoa Lazarus 2.2.6 fpc 3.2.2

[Grahame Grieve]

Also wrong for me on Lazarus 2.2.5 (rev lazarus_2_2_4-28-gcbedc5ddf0) FPC 3.2.3 aarch64-darwin-cocoa

[Grahame Grieve]

Well, it's a compiler bug, I think.

The program passes with FPC trunk, but if I copy the code for RegExpr from trunk to any older version of FPC, it fails.

[Jurassic Pork]

hello,
try \Z instead of $
Friendly, J.P

[Grahame Grieve]

No difference. Which is good from my pov, since I'm not writing the regex- it's standard stuff.

[Grahame Grieve]

Well, that presents me a challenge. I haven't yet found a version of Lazarus that doesn't access violate bringing up preferences while running on the trunk version of FPC... will keep trying

[TRon]

@graham:
Wait, what ?

Are you trying to tell us that you are unable to run current Lazarus (*) (in combination with Free Pascal 3.2.2 fixes) on your setup ? I ask explicitly because in you first post you referred to Free Pascal as being version 3.2.3 (fixes). To my knowledge Lazarus trunk (2.3) always requires Free Pascal 3.3.1 (trunk) and by chance happens to work with older versions of FPC. As correctly stated by dsiders below: Lazarus trunk (2.3) always requires the latest stable Free Pascal (3.2.2 at the time of writing).

(*) You referred to Lazarus as 2.2.7 (fixes) which is to my my knowledge currently non existent so when you wrote Lazarus I assumed you meant trunk (2.3). Latest official release version of Lazarus is 2.2.6 (fixes being 2.2.7, trunk being 2.3) and for FPC that is 3.2.2 (fixes being 3.2.3, trunk being 3.3.1)

[Grahame Grieve]

I have tried stable, trunk and fixes of Lazarus with FPC 3.3.1 or trunk and all the Lazarus versions access violate when I try to open Lazarus preferences. I'm currently running "Lazarus 2.2.7 (rev lazarus_2_2_6-1-gada7a90f86) FPC 3.2.3 aarch64-darwin-cocoa" as the most recent thing I can get to run, but the regex is still broken for me. I'm kind of hoping someone else will take the time to figure out why preferences doesn't work and I'll try again in a few days.

[dsiders]

To my knowledge Lazarus trunk (2.3) always requires Free Pascal 3.3.1 (trunk) and by chance happens to work with older versions of FPC.

And that is not correct. Lazarus trunk (2.3) has to build with the latest stable FPC release (3.2.2). Should work with 3.2.0... but everything I have at this point has 3.2.2. It's FPC 3.3.X that's the crap shoot, IMHO.

[TRon]

@dsiders:
Indeed, my apologies as you are right (I was incorrect there). Thank you for the correction. I adjusted my post accordingly.