[Bug c++/17359] New: Can't convert function pointer

[Bug c++/17359] New: Can't convert function pointer

[bangerth at dealii dot org]

[Taken from http://gcc.gnu.org/ml/gcc/2004-09/msg00389.html] 
 
We can't compile this: 
---------------------- 
class B {}; 
 
struct D : public B { 
  template <int> void foo(); 
}; 
 
typedef void (B::*BfooPtr)(); 
typedef void (D::*fooPtr)(); 
 
void bar () { 
  static_cast<BfooPtr>(&D::foo<1>); 
  static_cast<BfooPtr>((fooPtr)&D::foo<1>); 
} 
---------------------------- 
 
g/x> /home/bangerth/bin/gcc-3.5-pre/bin/c++ -c x.cc 
x.cc: In function `void bar()': 
x.cc:11: error: invalid static_cast from type `<unknown type>' to type `void 
(B::*)()' 
 
Note that the first line with the static_cast fails, whereas the second one 
succeeds. This is wrong, since the cast in the second line only casts the 
member function pointer to exactly its type as before. 
 
gcc is also wrong, since the same code succeeds when foo() is not a template, 
and finally the error message with <unknown type> is really unhelpful: after 
all we completely resolved the overload set to a single function by 
specifying the template argument. 
 
W.

-- 
           Summary: Can't convert function pointer
           Product: gcc
           Version: 3.5.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bangerth at dealii dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17359

[Bug c++/17359] Can't convert function pointer

[simartin at users dot sourceforge dot net]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |simartin at users dot
                   |                            |sourceforge dot net


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17359

[Bug c++/17359] Can't convert function pointer

[giovannibajo at libero dot it]

------- Additional Comments From giovannibajo at libero dot it  2004-09-09 10:01 -------
Confirmed, not a regression.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
      Known to fail|                            |2.95.3 3.0.4 3.2.3 3.3.3
                   |                            |3.4.0 3.5.0
   Last reconfirmed|0000-00-00 00:00:00         |2004-09-09 10:01:34
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17359

[Bug c++/17359] Can't convert function pointer

[paolo dot carlini at oracle dot com]

------- Comment #5 from paolo dot carlini at oracle dot com  2009-12-26 12:43 -------
Works in mainline, not a regression, closing.


-- 

paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
      Known to work|                            |4.5.0
         Resolution|                            |WORKSFORME
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17359

[Bug c++/17359] Can't convert function pointer

[pinskia at gcc dot gnu dot org]

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------- Comment #4 from pinskia at gcc dot gnu dot org  2009-04-16 18:06 -------
t.cc: In function ‘void bar()’:
t.cc:11: error: invalid static_cast from type ‘<unresolved overloaded function
type>’ to type ‘void (B::*)()’


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2005-05-01 03:45:12         |2009-04-16 18:06:58
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17359

[Bug c++/17359] Can't convert function pointer

[bangerth at dealii dot org]

------- Comment #3 from bangerth at dealii dot org  2007-01-21 05:23 -------
*** Bug 30281 has been marked as a duplicate of this bug. ***


-- 

bangerth at dealii dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pluto at agmk dot net


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17359

[Bug c++/17359] Can't convert function pointer

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2006-09-25 19:38 -------
This looks like a duplicated of PR 11407.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17359