RE: TString bug (or feature)?

From: Philippe Canal <pcanal_at_fnal.gov>
Date: Wed, 04 Apr 2007 02:55:54 -0500

Hi Arthur,

I can not reproduce the problem (or do not understand your description :) ).

Can you send me a complete running example (and the output as you see it) as well as the version of ROOT where it fails for you).

Cheers,
Philippe.

-----Original Message-----
From: owner-roottalk_at_pcroot.cern.ch [mailto:owner-roottalk_at_pcroot.cern.ch] On Behalf Of Arthur E. Snyder
Sent: Monday, April 02, 2007 4:43 PM
To: Rene Brun
Cc: 'roottalk (Mailing list discussing all aspects of the ROOT system)' Subject: [ROOT] TString bug (or feature)?

Hi Rene et al.,

I find that when I try to read the blank separated charachters in a line into TString from an istringstream it has a strange behavior. If the last character is followed directly by a line-feed it gets skipped. Apparently eof or something is set by reading it and the loop ends w.o. giving you a chance at the characters just read. The result is you lose the last character string. If I use std::string instead, it works as I expect it too.

The code is as follows:

#include "readCard.hh"
#include <TString.h>
#include <iostream>
#include <vector>
#include <string>

using std::istream;
using std::endl;
using std::cout;

//read strings till "eol" marker or natural end; if nread!=0 read nread string (no marker)
Int_t readCard(istream& card,std::vector<TString>& list,Int_t nread) {   Int_t count=0;

  TString temp;
  // std::string temp;
  while(card >> temp) {

    cout << "count:" << count << " temp:" << temp << endl;

    if(nread==0 && temp=="eol") break;
    if(nread==0 && temp=="*eol") break;
    if(nread==0 && temp=="!eol") break;

    count++;

    list.push_back(temp);
    if(count==nread) break;

  } // loop

  return count;
}

-Art S. Received on Wed Apr 04 2007 - 09:56:40 CEST