Re: c++/7498: copy constructor of ostream (and ios) is private and it should not be!

Re: c++/7498: copy constructor of ostream (and ios) is private and it should not be!

[pme]

Synopsis: copy constructor of ostream (and ios) is private and it should not be!

State-Changed-From-To: open->closed
State-Changed-By: pme
State-Changed-When: Mon Aug  5 09:35:53 2002
State-Changed-Why:
    
    Not a compiler bug; see audit trail for explanation.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7498

Re: c++/7498: copy constructor of ostream (and ios) is private and it should not be!

[Gabriel Dos Reis]

The following reply was made to PR c++/7498; it has been noted by GNATS.

From: Gabriel Dos Reis <gdr@integrable-solutions.net>
To: mdp@fnal.gov
Cc: gcc-gnats@gcc.gnu.org
Subject: Re: c++/7498: copy constructor of ostream (and ios) is private and it should not be!
Date: 05 Aug 2002 18:34:23 +0200

 mdp@fnal.gov writes:
 
 | >Number:         7498
 | >Category:       c++
 | >Synopsis:       copy constructor of ostream (and ios) is private and it should not be!
 
 [...]
 
 | >Release:        gcc 2.96.3 20000503/Linux
                   
 There is no GCC release named 2.96.3, I guess you meant 2.95.3.
 That release is known to come with pre-standard library.
 The library that comes with GCC-3.x is much more compliant and meets
 the standard requirement in that area.
 
 [...]
 
 |   ostream a=file;
 
 This is ill-formed, you cannot copy a std::ostream.
 
 | works on Visual C++ but on g++
 
 If it worked with Visual C++, then it is a bug in that compiler.
 
 -- Gaby

Re: c++/7498: copy constructor of ostream (and ios) is private and it should not be!

[Phil Edwards]

The following reply was made to PR c++/7498; it has been noted by GNATS.

From: Phil Edwards <phil@jaj.com>
To: mdp@fnal.gov
Cc: gcc-gnats@gcc.gnu.org
Subject: Re: c++/7498: copy constructor of ostream (and ios) is private and it should not be!
Date: Mon, 5 Aug 2002 12:35:08 -0400

 On Mon, Aug 05, 2002 at 04:22:39PM -0000, mdp@fnal.gov wrote:
 > The following program:
 > -----------------------------
 > #include "iostream"
 > #include "fstream"
 > void main() {
 >   ofstream file("test.dat");
 >   ostream a=file;
 >   a << "Hello\n";
 >   file.close();
 > }
 > -----------------------------
 > 
 > works on Visual C++
 
 Visual C++ is broken.
 
 > but on g++
 > gives the following error:
 
 Because the code is invalid.
 
 > Copy constructors of base_ios and derived classes should be public.
 
 No they shouldn't.  See section 27.4 of the C++ standard.
 
 -- 
 If ye love wealth greater than liberty, the tranquility of servitude greater
 than the animating contest for freedom, go home and leave us in peace.  We seek
 not your counsel, nor your arms.  Crouch down and lick the hand that feeds you;
 and may posterity forget that ye were our countrymen.            - Samuel Adams

c++/7498: copy constructor of ostream (and ios) is private and it should not be!

[mdp]

>Number:         7498
>Category:       c++
>Synopsis:       copy constructor of ostream (and ios) is private and it should not be!
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Aug 05 09:26:00 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Massimo Di Pierro
>Release:        gcc 2.96.3 20000503/Linux
>Organization:
>Environment:
Fermi Linux (www.fnal.gov) based on Red Hat 6.x.
>Description:
The following program:
-----------------------------
#include "iostream"
#include "fstream"
void main() {
  ofstream file("test.dat");
  ostream a=file;
  a << "Hello\n";
  file.close();
}
-----------------------------

works on Visual C++ but on g++
gives the following error:
-----------------------------
test.cpp: In method `ostream::ostream(int, int (***)(...), const ostream &)':
/usr/lib/gcc-lib/i386-redhat-linux/2.95.3/../../../../include/g++-3/streambuf.h:128: `ios::ios(const ios &)' is private
test.cpp:5: within this context
-----------------------------
>How-To-Repeat:

>Fix:
Copy constructors of base_ios and derived classes should be public.
>Release-Note:
>Audit-Trail:
>Unformatted: