Regex question

[ASerge]

I want to find all occurences of a pattern in a text.
Requirements: follows the nothing= and has to be within brackets.

Code: Pascal  [Select][+][-]

1. {$MODE OBJFPC}
2. {$APPTYPE CONSOLE}
3. {$LONGSTRINGS ON}
4.  
5. uses RegExpr;
6.  
7. procedure Test(const S: string);
8. var
9.   ROut, RIn: TRegExpr;
10. begin
11.   ROut := TRegExpr.Create('\(([^\)]*)\)');
12.   try
13.     if ROut.Exec(S) then
14.     begin
15.       RIn := TRegExpr.Create('nothing="([^"]+)"');
16.       try
17.         repeat
18.           if RIn.Exec(ROut.Match[1]) then
19.             repeat
20.               Writeln(RIn.Match[1]);
21.             until not RIn.ExecNext;
22.         until not ROut.ExecNext;
23.       finally
24.         RIn.Free;
25.       end;
26.     end;
27.   finally
28.     ROut.Free;
29.   end;
30. end;
31.  
32. const
33.   CSampleInputText =
34.     'Something (anything nothing="hey!", anything something, nothing="hola!", thing)' + LineEnding +
35.     'something nothing="aloha!"' + LineEnding +
36.     '(skip empty nothing="")' + LineEnding +
37.     '(other nothing="other!", nothing="again!", thing)';
38. begin
39.   Test(CSampleInputText);
40.   Readln;
41. end.

[maurobio]

Dear ALL,

I have strings with some embedded characters as follows:

s := '\i{}This is a string\i0{}'

I want to get rid of the \{} and \i0{} using the following regex:

e := '\\i\d*{}'

But when I attempt this:

n := ReplaceRegExpr(e, s, '', True);

I get the error:

TRegrExpr(comp): Nested *?+ (pos 6)

The above regex works in Python (as n = re.sub(e, '', s)), but obviously the FPC implementation is different.

Could someone give me a hand?

Thanks in advance!

Best regards,

[Thaddy]

I already replied in the other post: use an escape to escape a slash \\

[maurobio]

Thanks, @Thaddy!

[maurobio]

... but when I changed the regex to:

e := '\\i\\d*{}'

I still get the same error (just one position changed):

TRegrExpr(comp): Nested *?+ (pos 7)

Any hints?

[bytebites]

e:='\\i\d*\{}'

() is not needed.

[maurobio]

@bitebyes:

There are no parentheses ('()') in my regex, those are braces ('{}'), which are part of the string and that I want to get rid of.

Cheers,