Re: Question about TPRegexp

Hi Antonio,

The MatchB function is defined as :

   Bool_t     MatchB(const TString &s, const TString &mods="",
                     Int_t offset=0, Int_t nMaxMatch=30)

So the default number of "matches" is set to 30 which is in your case too small .
Change your line to

if (longTest.MatchB(longString,"",0,50))

and it will work .

Eddy

• Antonio Bulgheroni <antonio.bulgheroni_at_gmail.com> wrote:

> Dear ROOTers,
>
> I would like to use TPRegexp to parse the content of a string
> and
> recognize usefull information inside, but I'm experiencing a strange
> problem. It looks like that TPRegexp cannot extract more than 10
> groups. Is
> that a "nice" feature of pcre or I'm missing something?
>
> Here an example to show you the problem...
>
> int test() {
>
> TPRegexp
>

longTest("^\\s*(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s*$");
> TString longString("1 2 3 4 5 6 7 8 9 10");
>
> TPRegexp
>

shortTest("^\\s*(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s*");
> TString shortString("1 2 3 4 5 6 7 8 9");
>
> if (shortTest.MatchB(shortString)) {
> cout << "Short test passed" << endl;
> } else {
> cout << "Short test failed" << endl;
> }
>
>
> if (longTest.MatchB(longString)) {
> cout << "Long test passed" << endl;
> } else {
> cout << "Long test failed" << endl;
> }
>
> return 0;
> }
>
>
> And this is the output
>
> root [8] .L test.C
> root [9] test()
> Short test passed
> Error in <Match>: pcre_exec error = 0
> Long test failed
> (int)0
>
> Thanks for your help,
>
> Cheers
>
> Antonio
>
> --
>
> Antonio Bulgheroni, PhD
>
Received on Thu May 11 2006 - 17:13:01 MEST