[Bug c++/23293] New: Misleading names in diagnostics for typedefs in functions

[Bug c++/23293] New: Misleading names in diagnostics for typedefs in functions

[sylvain dot pion at sophia dot inria dot fr]

Compiling the attached program with g++ -Wall (3.3, 3.4, 4.0 and 4.1)
produces :

demo.C: In function `void generate_warning() [with U = P<unrelated_function()::K>]':
demo.C:19:   instantiated from here
demo.C:14: warning: unused variable 'u'

The problem here is that the warning names the type P<S> as
P<unrelated_function()::K>, because it was first instantiated there,
and it gives the typedef name.
But the warning is generated in the function generate_warning(),
which is completely unrelated to unrelated_function().

-- 
           Summary: Misleading names in diagnostics for typedefs in
                    functions
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: sylvain dot pion at sophia dot inria dot fr
                CC: gcc-bugs at gcc dot gnu dot org,sylvain dot pion at
                    sophia dot inria dot fr
  GCC host triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23293

[Bug c++/23293] Misleading names in diagnostics for typedefs in functions

[sylvain dot pion at sophia dot inria dot fr]

------- Additional Comments From sylvain dot pion at sophia dot inria dot fr  2005-08-08 21:55 -------
Created an attachment (id=9448)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=9448&action=view)
c++ program that generates the warning


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23293

[Bug c++/23293] Misleading names in diagnostics for typedefs in functions

[sylvain dot pion at sophia dot inria dot fr]

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23293

[Bug c++/23293] [3.4/4.0/4.1 Regression] Misleading names in diagnostics for typedefs in functions

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-08-08 22:01 -------
Confirmed, a regression from 2.95.3:
earth:~>~/ia32_linux_gcc2_95//bin/gcc t.cc -W -Wall
t.cc: In function `void generate_warning<P<S> >()':
t.cc:19:   instantiated from here
t.cc:14: warning: unused variable `struct P<S> * u'

It was even worse in 3.0.4-3.3.3:
earth:~>~/ia32_linux_gcc3_0/bin/gcc t.cc -W -Wall
t.cc: In function `void generate_warning() [with U = P<void 
   unrelated_function()::K>]':
t.cc:19:   instantiated from here
t.cc:14: warning: unused variable `P<void unrelated_function()::K>*u'



-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |minor
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
      Known to fail|                            |3.0.4 3.1.2 3.2.3 3.3.5
                   |                            |3.4.2 4.0.0
      Known to work|                            |2.95
   Last reconfirmed|0000-00-00 00:00:00         |2005-08-08 22:01:23
               date|                            |
            Summary|Misleading names in         |[3.4/4.0/4.1 Regression]
                   |diagnostics for typedefs in |Misleading names in
                   |functions                   |diagnostics for typedefs in
                   |                            |functions
   Target Milestone|---                         |4.0.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23293

[Bug c++/23293] [3.4/4.0/4.1 Regression] Misleading names in diagnostics for typedefs in functions

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-08-08 22:06 -------
This is related to PR 22573.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23293

[Bug c++/23293] [3.4/4.0/4.1 Regression] Misleading names in diagnostics for typedefs in functions

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-08-08 22:08 -------
And related to PR 17763.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23293

[Bug c++/23293] [3.4/4.0/4.1 Regression] Misleading names in diagnostics for typedefs in functions

[mmitchel at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.0.2                       |4.0.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23293