[Bug c++/13178] New: Bogus C++ error message referring to operator 1

[Bug c++/13178] New: Bogus C++ error message referring to operator 1

[ian at airs dot com]

Compiling this test case

template<typename t>
class C
{
  template<typename u> operator t() { return (u) this->i; }
  int i;
};
int fn (C<float> c) { return C<float>::operator float<int>(c); }

using the compiler in the build tree

gcc/xgcc -Bgcc/ -c ~/foo3.cc

yields this bogus error message:

/home/ian/foo3.cc: In function `int fn(C<float>)':
/home/ian/foo3.cc:7: error: no matching function for call to `C<float>::operator
1(C<float>&)'

There is obviously no ``operator 1''.  Admittedly this program is buggy, but the
error message should still be fixed.

-- 
           Summary: Bogus C++ error message referring to operator 1
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ian at airs dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] Bogus C++ error message referring to operator 1

[ian at airs dot com]

------- Additional Comments From ian at airs dot com  2003-11-24 18:11 -------
Created an attachment (id=5206)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=5206&action=view)
This is the test case as an attachment

This is the test case as an attachment.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] Bogus C++ error message referring to operator 1

[bangerth at dealii dot org]

------- Additional Comments From bangerth at dealii dot org  2003-11-24 18:27 -------
Confirmed. The error message is not much worse than the one given previously

g/x> /home/bangerth/bin/gcc-3.3.2/bin/c++ -c x.cc
x.cc: In function `int fn(C<float>)':
x.cc:7: error: no matching function for call to `C<float>::operator t(C<float>&)'

g/x> /home/bangerth/bin/gcc-3.4-pre/bin/c++ -c x.cc
x.cc: In function `int fn(C<float>)':
x.cc:7: error: no matching function for call to `C<float>::operator 1(C<float>&)'

So this should maybe not count as a regression. It's a bad message
in any case, worth fixing.

W.

PS: How did you get to write such code? Martin van Loewis once posted
a PR in which he showed that such function signatures are sometimes
even accepted by gcc, erroneously of course (this is PR 8856)...

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] Bogus C++ error message referring to operator 1

[ian at wasabisystems dot com]

------- Additional Comments From ian at wasabisystems dot com  2003-11-24 18:32 -------
Subject: Re:  Bogus C++ error message referring to operator 1

"bangerth at dealii dot org" <gcc-bugzilla@gcc.gnu.org> writes:

> PS: How did you get to write such code? Martin van Loewis once posted
> a PR in which he showed that such function signatures are sometimes
> even accepted by gcc, erroneously of course (this is PR 8856)...

I recently wrote a new demangler, and I was trying to create a test
case which used an outer template parameter as the result type of a
templated conversion operator.  So it's not real code.  I just noticed
the bogus error message during my attempts.  I did eventually manage
to do what I wanted.

Ian


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] Bogus C++ error message referring to operator 1

[bangerth at dealii dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] Bogus C++ error message referring to operator 1

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2003-11-24 19:53 -------
Should have been marked confirmed already.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2003-11-24 19:53:39
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] Bogus C++ error message referring to operator 1

[giovannibajo at libero dot it]

------- Additional Comments From giovannibajo at libero dot it  2004-01-16 01:37 -------
More reduced testcase:

----------------------------------------
class C
{
  template<typename U> 
  operator U();
};

int fn (C c) 
{ 
   return C::operator float(c); 
}
----------------------------------------
pr13178.cc:9: error: no matching function for call to `C::operator 1(C&)'

Looks like a pretty printing issue.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] [3.4 Regression] Bogus C++ error message referring to operator 1

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-01-16 01:43 -------
This is a regression from 3.3.3.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Bogus C++ error message     |[3.4 Regression] Bogus C++
                   |referring to operator 1     |error message referring to
                   |                            |operator 1
   Target Milestone|---                         |3.4.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] [3.4 Regression] Bogus C++ error message referring to operator 1

[giovannibajo at libero dot it]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|3.4.1                       |3.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] [3.3/3.4 Regression] Bogus C++ error message referring to operator 1

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-01-16 03:06 -------
Looks like this changed once with the new parser.
And some time before that, I have not looked when.

3.2.3 just to say:
input.cc:9: no matching function for call to `C::operator float(C&)'

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mmitchel at gcc dot gnu dot
                   |                            |org
            Summary|[3.4 Regression] Bogus C++  |[3.3/3.4 Regression] Bogus
                   |error message referring to  |C++ error message referring
                   |operator 1                  |to operator 1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] [3.3/3.4 Regression] Bogus C++ error message referring to operator 1

[giovannibajo at libero dot it]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|3.4.0                       |3.3.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] [3.3/3.4 Regression] Bogus C++ error message referring to operator 1

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-01-16 03:12 -------
The orginal change was introduced between 2002-07-28 and 2002-08-04.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|3.3.3                       |3.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] [3.3/3.4 Regression] Bogus C++ error message referring to operator 1

[mmitchel at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |mark at codesourcery dot com
                   |dot org                     |
             Status|NEW                         |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] [3.3/3.4 Regression] Bogus C++ error message referring to operator 1

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-01-16 18:40 -------
Subject: Bug 13178

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	mmitchel@gcc.gnu.org	2004-01-16 18:39:58

Modified files:
	gcc/cp         : ChangeLog call.c 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/g++.dg/conversion: op1.C 

Log message:
	PR c++/13178
	* call.c (name_as_c_string): Print conversion operator names
	correctly.
	
	PR c++/13178
	* g++.dg/conversion/op1.C: New test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&r1=1.3889&r2=1.3890
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/call.c.diff?cvsroot=gcc&r1=1.451&r2=1.452
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.3386&r2=1.3387
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/conversion/op1.C.diff?cvsroot=gcc&r1=NONE&r2=1.1


------- Additional Comments From mmitchel at gcc dot gnu dot org  2004-01-16 18:40 -------
Fixed in GCC 3.4.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|mark at codesourcery dot com|unassigned at gcc dot gnu
                   |                            |dot org
             Status|ASSIGNED                    |NEW
            Summary|[3.3/3.4 Regression] Bogus  |[3.3 Regression] Bogus C++
                   |C++ error message referring |error message referring to
                   |to operator 1               |operator 1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] [3.3 Regression] Bogus C++ error message referring to operator 1

[mmitchel at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-01-16 18:40 -------
Subject: Bug 13178

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	mmitchel@gcc.gnu.org	2004-01-16 18:39:58

Modified files:
	gcc/cp         : ChangeLog call.c 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/g++.dg/conversion: op1.C 

Log message:
	PR c++/13178
	* call.c (name_as_c_string): Print conversion operator names
	correctly.
	
	PR c++/13178
	* g++.dg/conversion/op1.C: New test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&r1=1.3889&r2=1.3890
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/call.c.diff?cvsroot=gcc&r1=1.451&r2=1.452
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.3386&r2=1.3387
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/conversion/op1.C.diff?cvsroot=gcc&r1=NONE&r2=1.1


------- Additional Comments From mmitchel at gcc dot gnu dot org  2004-01-16 18:40 -------
Fixed in GCC 3.4.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|mark at codesourcery dot com|unassigned at gcc dot gnu
                   |                            |dot org
             Status|ASSIGNED                    |NEW
            Summary|[3.3/3.4 Regression] Bogus  |[3.3 Regression] Bogus C++
                   |C++ error message referring |error message referring to
                   |to operator 1               |operator 1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] [3.3 Regression] Bogus C++ error message referring to operator 1

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-01-16 18:45 -------
Gaby, this is 3.3.3 regression but it is only a diagnostic problem, what you want to do with 
it?

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gdr at gcc dot gnu dot org
   Target Milestone|3.4.0                       |3.3.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] [3.3 Regression] Bogus C++ error message referring to operator 1

[gdr at integrable-solutions dot net]

------- Additional Comments From gdr at integrable-solutions dot net  2004-01-16 20:49 -------
Subject: Re:  [3.3 Regression] Bogus C++ error message referring to operator 1

"pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> writes:

| Gaby, this is 3.3.3 regression but it is only a diagnostic problem,
| what you want to do with it?

Set its priority to normal.  If/when I'm done with the other packport
and higher level priority bugs, I may look into it. If not, it will be
addressed after 3.3.3.

Thanks,

-- Gaby


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] [3.3 Regression] Bogus C++ error message referring to operator 1

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|minor                       |normal


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] [3.3 Regression] Bogus C++ error message referring to operator 1

[gdr at gcc dot gnu dot org]

------- Additional Comments From gdr at gcc dot gnu dot org  2004-02-15 12:37 -------
Adjust milestone

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|3.3.3                       |3.3.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178

[Bug c++/13178] [3.3 Regression] Bogus C++ error message referring to operator 1

[gdr at gcc dot gnu dot org]

------- Additional Comments From gdr at gcc dot gnu dot org  2004-04-27 06:32 -------
Fixed in 3.4.0 and 3.5.0.
The fix for this bug should be simple in principle.
However, it involves one of those functions that were introduced
with no data for archeology.
Won't fix in 3.3.x

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|3.3.4                       |3.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13178