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* Re: libstdc++/7824: Temporary ostream doesn't work properly with operator<< and const char*
@ 2002-11-06 9:56 Martin Sebor
0 siblings, 0 replies; 4+ messages in thread
From: Martin Sebor @ 2002-11-06 9:56 UTC (permalink / raw)
To: jason; +Cc: gcc-prs
The following reply was made to PR libstdc++/7824; it has been noted by GNATS.
From: Martin Sebor <sebor@roguewave.com>
To: bkoz@gcc.gnu.org, gcc-gnats@gcc.gnu.org
Cc:
Subject: Re: libstdc++/7824: Temporary ostream doesn't work properly with
operator<< and const char*
Date: Wed, 06 Nov 2002 10:52:45 -0700
bkoz@gcc.gnu.org wrote:
> Synopsis: Temporary ostream doesn't work properly with operator<< and const char*
>
> Responsible-Changed-From-To: unassigned->jason
> Responsible-Changed-By: bkoz
> Responsible-Changed-When: Wed Nov 6 08:43:44 2002
> Responsible-Changed-Why:
> Jason, can you take a look at this? If not, maybe Nathan? I think this is an issue with overload resolution and temporaries. Seems odd.
That's the correct behavior. The char* non-member inserter takes
a non-const reference, so it's not a viable match. The void*
inserter is a member, so it is called for the unnamed temporary
(rvalue). We got the same report a while ago :)
Regards
Martin
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: libstdc++/7824: Temporary ostream doesn't work properly with operator<< and const char*
@ 2002-11-06 11:36 Benjamin Kosnik
0 siblings, 0 replies; 4+ messages in thread
From: Benjamin Kosnik @ 2002-11-06 11:36 UTC (permalink / raw)
To: jason; +Cc: gcc-prs
The following reply was made to PR libstdc++/7824; it has been noted by GNATS.
From: Benjamin Kosnik <bkoz@redhat.com>
To: Martin Sebor <sebor@roguewave.com>
Cc: bkoz@gcc.gnu.org, gcc-gnats@gcc.gnu.org
Subject: Re: libstdc++/7824: Temporary ostream doesn't work properly with operator<< and const char*
Date: Wed, 6 Nov 2002 13:28:08 -0600
>That's the correct behavior. The char* non-member inserter takes
>a non-const reference, so it's not a viable match. The void*
>inserter is a member, so it is called for the unnamed temporary
>(rvalue). We got the same report a while ago :)
A ha! Thanks Martin.
I'll close this now...
-benjamin
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: libstdc++/7824: Temporary ostream doesn't work properly with operator<< and const char*
@ 2002-11-06 11:31 bkoz
0 siblings, 0 replies; 4+ messages in thread
From: bkoz @ 2002-11-06 11:31 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, jason, phil
Synopsis: Temporary ostream doesn't work properly with operator<< and const char*
State-Changed-From-To: analyzed->closed
State-Changed-By: bkoz
State-Changed-When: Wed Nov 6 11:31:03 2002
State-Changed-Why:
Not a bug.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7824
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: libstdc++/7824: Temporary ostream doesn't work properly with operator<< and const char*
@ 2002-11-06 8:43 bkoz
0 siblings, 0 replies; 4+ messages in thread
From: bkoz @ 2002-11-06 8:43 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, jason, nobody, phil
Synopsis: Temporary ostream doesn't work properly with operator<< and const char*
Responsible-Changed-From-To: unassigned->jason
Responsible-Changed-By: bkoz
Responsible-Changed-When: Wed Nov 6 08:43:44 2002
Responsible-Changed-Why:
Jason, can you take a look at this? If not, maybe Nathan? I think this is an issue with overload resolution and temporaries. Seems odd.
State-Changed-From-To: open->analyzed
State-Changed-By: bkoz
State-Changed-When: Wed Nov 6 08:43:44 2002
State-Changed-Why:
Even simpler:
#include <iostream>
int main()
{
const char* str = "Hello world";
#if 1
// uses operator << void*
std::ostream(std::cerr.rdbuf()) << str << std::endl;
#else
// uses operator << char*
std::cerr << str << std::endl;
#endif
return 0;
}
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7824
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2002-11-06 19:36 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2002-11-06 9:56 libstdc++/7824: Temporary ostream doesn't work properly with operator<< and const char* Martin Sebor
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2002-11-06 11:36 Benjamin Kosnik
2002-11-06 11:31 bkoz
2002-11-06 8:43 bkoz
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