[Bug c++/16057] Error message omits overload candidate

[Bug c++/16057] Error message omits overload candidate

[igodard at pacbell dot net]

------- Additional Comments From igodard at pacbell dot net  2004-06-18 11:37 -------
Created an attachment (id=6557)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=6557&action=view)
Compiler output (-v -save-temps)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16057

[Bug c++/16057] New: Error message omits overload candidate

[igodard at pacbell dot net]

The error message does not list one of the possible overloads of operator<<,
namely the one at display.hh:407:

template<typename Ch, typename Tr, typename Al, typename T>
inline
Display<Ch, Tr, Al>&
            operator<<(Display<Ch, Tr, Al>& d, T t) {
                d.under << t;
                d.Scan();
                return d;
                }

-- 
           Summary: Error message omits overload candidate
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: igodard at pacbell dot net
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16057

[Bug c++/16057] Error message omits overload candidate

[igodard at pacbell dot net]

------- Additional Comments From igodard at pacbell dot net  2004-06-18 11:39 -------
Created an attachment (id=6558)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=6558&action=view)
Source code (-save-temps)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16057

[Bug c++/16057] Error message omits overload candidate

[bangerth at dealii dot org]

------- Additional Comments From bangerth at dealii dot org  2004-06-18 14:52 -------
Confirmed. Here is some code: 
---------------- 
void endl (int); 
void endl (double); 
 
struct A {}; 
 
void operator << (A &, int); 
 
template<typename U> 
void operator << (A &, U); 
 
int main() { 
  A* e; 
  *e << endl; 
} 
--------------------- 
Note that 'endl' is the set of overloads; this would be alright if we 
could find a function that picks a single element from this set of 
overloads by a suitable type for the second argument, but we don't 
have such a function. Instead, we get this: 
 
g/x> /home/bangerth/bin/gcc-3.4-pre/bin/c++ -w -c x.cc 
x.cc: In function `int main()': 
x.cc:13: error: no match for 'operator<<' in '*e << endl' 
x.cc:6: note: candidates are: void operator<<(A&, int) 
 
Indeed, only one of the overloads of operator<< is listed. Now, one 
could argue that this isn't even a bug: the second, templated overload, 
is unable to pick among the overload set, so it can't possibly be a 
candidate anyway, but this is a rather narrow interpretation. I would 
concede that it may make sense  to list all operator<< overloads here. 
 
W. 

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |minor
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2004-06-18 14:52:28
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16057

[Bug c++/16057] Error message omits overload candidate

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
   Last reconfirmed|2004-09-20 00:55:26         |2004-12-20 00:27:05
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16057

[Bug c++/16057] Error message omits overload candidate

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-06-20 03:01 -------
*** Bug 20576 has been marked as a duplicate of this bug. ***

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16057

[Bug c++/16057] Error message omits overload candidate

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16057

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|gcc-bugs at gcc dot gnu.org |
         Resolution|                            |FIXED

--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-09-27 08:31:02 UTC ---
Fixed in 4.6.0.