Re: c++/9648: g++-3.2.2 cannot create a new file. (g++-2.95.3 does)

Re: c++/9648: g++-3.2.2 cannot create a new file. (g++-2.95.3 does)

[Takashi Kawai]

The following reply was made to PR libstdc++/9648; it has been noted by GNATS.

From: Takashi Kawai <kawai@tkpe1.sumitomo-chem.co.jp>
To: gcc-gnats@gcc.gnu.org
Cc: kawai@tkpe1.sumitomo-chem.co.jp (Takashi Kawai)
Subject: Re: c++/9648: g++-3.2.2 cannot create a new file. (g++-2.95.3 does)
Date: Tue, 11 Feb 2003 05:23:15 +0900 (JST)

 February 11, 2003
 
      I'm sorry.  The code is wrong and g++-3.22 is exactly correct.
 
     If the line:
 
 > foo.open(filename.c_str(),ios::in | ios::out);
 
 is replaced to:
 
 > foo.open(filename.c_str(),ios::in | ios::out | ios::trunc)
 
 , then it works.
 
     I'd completely misunderstood that "ios::in | ios::out" works even
 if the file doesn't exist; in fact, it doesn't work only when the file
 exists.
 
     I'm very sorry to bother you about my mistake.
 
 Best wishes,
 
 Takashi Kawai
 Takatsuki / Japan
 
 > Thank you very much for your problem report.
 > It has the internal identification `c++/9648'.
 > The individual assigned to look at your
 > report is: unassigned. 
 > 
 > >Category:       c++
 > >Responsible:    unassigned
 > >Synopsis:       g++-3.2.2 cannot create a new file. (g++-2.95.3 does)
 > >Arrival-Date:   Mon Feb 10 20:16:00 UTC 2003
 > 
 

c++/9648: g++-3.2.2 cannot create a new file. (g++-2.95.3 does)

[kawai]

>Number:         9648
>Category:       c++
>Synopsis:       g++-3.2.2 cannot create a new file. (g++-2.95.3 does)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          rejects-legal
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 10 20:16:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Takashi Kawai
>Release:        gcc-3.2.2, --enable-shared
>Organization:
>Environment:
Redhat Linux 7.2J, Dell PE2450 (Pentium III 1GHz x 2)
>Description:
The file "$HOME/foo.bar" should be opened whether it exists or not.  g++-2.95.3 works, however g++-3.22 doesn't work when the file doesn't exist; it says "cannot open /home/kawai/foo.bar"

>How-To-Repeat:
using namespace std;

#include <cstdlib>
#include <iostream>
#include <fstream>
#include <string>

int main(void)
{
string filename(getenv("HOME"));
filename += "/foo.bar";

std::fstream foo;
foo.open(filename.c_str(),ios::in | ios::out);

if (!foo) {
    cerr << "Cannot open " << filename << endl;
} else {
    cerr << "successfully opened " << filename << endl;
}

foo.close();

return 0;
}
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: