[Bug libstdc++/11126] New: Error in valarray::operator =

[Bug libstdc++/11126] New: Error in valarray::operator =

[lupoderi@tiscali.it]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11126

           Summary: Error in valarray::operator =
           Product: gcc
           Version: 3.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libstdc++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: lupoderi@tiscali.it
                CC: gcc-bugs@gcc.gnu.org

The valarrat::operator=() doesn't change the size of right side operand.
For example, the following code fails the assert:

#include <iostream>
#include <valarray>
#include <assert.h>

using namespace std;

int main()
{
  const int kLen = 2;

  valarray<int> v1, v2;
  int i;

  v1.resize(kLen);

  for (i=0; i<kLen; ++i)
	 v1[i] = i;

  v2=v1;

  assert (v2.size() == v1.size());
  for (i=0; i<kLen; ++i)
	 assert (v2[i]==i);


  return 0;
}

[Bug libstdc++/11126] Error in valarray::operator =

[lupoderi@tiscali.it]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11126



------- Additional Comments From lupoderi@tiscali.it  2003-06-08 15:38 -------
I meaning left side operand. Sorry.

[Bug libstdc++/11126] Error in valarray::operator =

[gdr@integrable-solutions.net]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11126



------- Additional Comments From gdr@integrable-solutions.net  2003-06-08 16:12 -------
Subject: Re:  New: Error in valarray::operator =

"lupoderi@tiscali.it" <gcc-bugzilla@gcc.gnu.org> writes:

| PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
| 
| http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11126
| 
|            Summary: Error in valarray::operator =
|            Product: gcc
|            Version: 3.3
|             Status: UNCONFIRMED
|           Severity: normal
|           Priority: P2
|          Component: libstdc++
|         AssignedTo: unassigned@gcc.gnu.org
|         ReportedBy: lupoderi@tiscali.it
|                 CC: gcc-bugs@gcc.gnu.org
| 
| The valarrat::operator=() doesn't change the size of right side operand.

This is not a bug.  It is standard conformant behaviour.
A valarray is not expected to be size-adapting.  It is  undefined if
the left and the right sides have different sizes.  This must be a
FAQ.

-- Gaby

Re: [Bug libstdc++/11126] New: Error in valarray::operator =

[Gabriel Dos Reis]

"lupoderi@tiscali.it" <gcc-bugzilla@gcc.gnu.org> writes:

| PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
| 
| http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11126
| 
|            Summary: Error in valarray::operator =
|            Product: gcc
|            Version: 3.3
|             Status: UNCONFIRMED
|           Severity: normal
|           Priority: P2
|          Component: libstdc++
|         AssignedTo: unassigned@gcc.gnu.org
|         ReportedBy: lupoderi@tiscali.it
|                 CC: gcc-bugs@gcc.gnu.org
| 
| The valarrat::operator=() doesn't change the size of right side operand.

This is not a bug.  It is standard conformant behaviour.
A valarray is not expected to be size-adapting.  It is  undefined if
the left and the right sides have different sizes.  This must be a
FAQ.

-- Gaby

[Bug libstdc++/11126] Error in valarray::operator =

[dhazeghi@yahoo.com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11126



------- Additional Comments From dhazeghi@yahoo.com  2003-06-09 08:15 -------
Gaby, should this be closed, or marked as a documentation enhancement request?

[Bug libstdc++/11126] Error in valarray::operator =

[gdr@integrable-solutions.net]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11126



------- Additional Comments From gdr@integrable-solutions.net  2003-06-09 09:58 -------
Subject: Re:  Error in valarray::operator =

"dhazeghi@yahoo.com" <gcc-bugzilla@gcc.gnu.org> writes:

| Gaby, should this be closed, or marked as a documentation
| enhancement request? 

Closed.

Thank you.

-- Gaby

[Bug libstdc++/11126] Error in valarray::operator =

[pme@gcc.gnu.org]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11126


pme@gcc.gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


------- Additional Comments From pme@gcc.gnu.org  2003-06-09 16:26 -------
Closed, not-a-bug, as per Gaby.

(Possibly a "debug mode" library could throw an exception during the assignment.)

[Bug libstdc++/11126] Error in valarray::operator =

[lupoderi@tiscali.it]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11126



------- Additional Comments From lupoderi@tiscali.it  2003-06-09 18:57 -------
I think that throwing an exception when NDEBUG is not defined is a good idea. 
Thank you to the interest,

Luigi

[Bug libstdc++/11126] Error in valarray::operator =

[ppluzhnikov at charter dot net]

------- Additional Comments From ppluzhnikov at charter dot net  2004-10-07 01:02 -------
*** Bug 17875 has been marked as a duplicate of this bug. ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ppluzhnikov at charter dot
                   |                            |net


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11126