* [Bug c++/19076] Pointer to member function not matched
2004-12-19 9:57 [Bug c++/19076] New: Pointer to member function not matched pcarlini at suse dot de
@ 2004-12-19 13:40 ` pinskia at gcc dot gnu dot org
2004-12-19 20:02 ` bangerth at dealii dot org
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From: pinskia at gcc dot gnu dot org @ 2004-12-19 13:40 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-12-19 13:40 -------
Confirmed.
Here is a compile time test instead of a runtime test (it is easier to keep track of):
template<typename _Tp1>
struct is_member_pointer { void f(){_Tp1 t = 100;}};
template<typename _Tp, typename _Cp>
struct is_member_pointer<_Tp _Cp::*> {void f(){}};
struct S {void f(void);};
typedef void (S::*PMF)(void);
int main()
{
is_member_pointer<PMF> i;
i.f();
}
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Keywords| |accepts-invalid, rejects-
| |valid, wrong-code
Last reconfirmed|0000-00-00 00:00:00 |2004-12-19 13:40:13
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19076
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2004-12-19 9:57 [Bug c++/19076] New: Pointer to member function not matched pcarlini at suse dot de
2004-12-19 13:40 ` [Bug c++/19076] " pinskia at gcc dot gnu dot org
@ 2004-12-19 20:02 ` bangerth at dealii dot org
2004-12-19 22:19 ` [Bug c++/19076] Pointer to member function not matched to pointer to member template bangerth at dealii dot org
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From: bangerth at dealii dot org @ 2004-12-19 20:02 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From bangerth at dealii dot org 2004-12-19 20:01 -------
Why not the minimal testcase:
---------------------
template <typename> struct X;
template<typename _Tp, typename _Cp> struct X<_Tp _Cp::*> {};
typedef int F();
struct S { F f; };
typedef F S::*PMF;
X<PMF> s;
--------------------
g/x> c++ -c x.cc
x.cc:9: error: aggregate `X<int (S::*)()> s' has incomplete type and cannot be
defined
x.cc:9: error: storage size of `s' isn't known
g/x> icc -c x.cc
The problem is really that F is a reference to a function. If we define
the typedef as
typedef int F;
then everything is fine.
W.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19076
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2004-12-19 9:57 [Bug c++/19076] New: Pointer to member function not matched pcarlini at suse dot de
2004-12-19 13:40 ` [Bug c++/19076] " pinskia at gcc dot gnu dot org
2004-12-19 20:02 ` bangerth at dealii dot org
@ 2004-12-19 22:19 ` bangerth at dealii dot org
2004-12-20 12:29 ` reichelt at gcc dot gnu dot org
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From: bangerth at dealii dot org @ 2004-12-19 22:19 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From bangerth at dealii dot org 2004-12-19 22:19 -------
I should have been more clear: the problem is with matching a pointer-
to-member-function with a pointer-to-member template.
W.
--
What |Removed |Added
----------------------------------------------------------------------------
Summary|Pointer to member function |Pointer to member function
|not matched |not matched to pointer to
| |member template
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19076
^ permalink raw reply [flat|nested] 15+ messages in thread* [Bug c++/19076] Pointer to member function not matched to pointer to member template
2004-12-19 9:57 [Bug c++/19076] New: Pointer to member function not matched pcarlini at suse dot de
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2004-12-19 22:19 ` [Bug c++/19076] Pointer to member function not matched to pointer to member template bangerth at dealii dot org
@ 2004-12-20 12:29 ` reichelt at gcc dot gnu dot org
2004-12-20 13:25 ` giovannibajo at libero dot it
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From: reichelt at gcc dot gnu dot org @ 2004-12-20 12:29 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From reichelt at gcc dot gnu dot org 2004-12-20 12:29 -------
Here's an even simpler testcase:
============================================
typedef int F();
struct A { F f; };
template<typename> struct B;
template<typename T> struct B<T A::*> {};
B<F A::*> b;
============================================
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |reichelt at gcc dot gnu dot
| |org
GCC build triplet|Any |
GCC host triplet|Any |
GCC target triplet|Any |
Keywords| |monitored
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19076
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2004-12-19 9:57 [Bug c++/19076] New: Pointer to member function not matched pcarlini at suse dot de
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2004-12-20 12:29 ` reichelt at gcc dot gnu dot org
@ 2004-12-20 13:25 ` giovannibajo at libero dot it
2004-12-20 13:40 ` pcarlini at suse dot de
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From: giovannibajo at libero dot it @ 2004-12-20 13:25 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From giovannibajo at libero dot it 2004-12-20 13:25 -------
Does this require the member function to be *declared* through the typedef?
Otherwise I think it looks easier to understand where the bug is if the
testcase uses a normal declaration for the member function inside the class
definition.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19076
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2004-12-19 9:57 [Bug c++/19076] New: Pointer to member function not matched pcarlini at suse dot de
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2004-12-20 13:25 ` giovannibajo at libero dot it
@ 2004-12-20 13:40 ` pcarlini at suse dot de
2004-12-20 15:15 ` bangerth at dealii dot org
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From: pcarlini at suse dot de @ 2004-12-20 13:40 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pcarlini at suse dot de 2004-12-20 13:40 -------
Hi Giovanni. Indeed, I don't think typedefs are directly involved and probably
we can further simplify like this:
===========================================
struct A {};
template<typename> struct B;
template<typename T> struct B<T A::*> {};
B<void(A::*)()> b;
===========================================
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19076
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2004-12-19 9:57 [Bug c++/19076] New: Pointer to member function not matched pcarlini at suse dot de
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2004-12-20 13:40 ` pcarlini at suse dot de
@ 2004-12-20 15:15 ` bangerth at dealii dot org
2004-12-25 18:48 ` giovannibajo at libero dot it
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From: bangerth at dealii dot org @ 2004-12-20 15:15 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From bangerth at dealii dot org 2004-12-20 15:15 -------
This last testcase indeed still shows the problem. It doesn't compile
with gcc, but does with icc.
W.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19076
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2004-12-19 9:57 [Bug c++/19076] New: Pointer to member function not matched pcarlini at suse dot de
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2004-12-20 15:15 ` bangerth at dealii dot org
@ 2004-12-25 18:48 ` giovannibajo at libero dot it
2005-01-20 18:02 ` pinskia at gcc dot gnu dot org
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From: giovannibajo at libero dot it @ 2004-12-25 18:48 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From giovannibajo at libero dot it 2004-12-25 18:48 -------
I played with this briefly, and the bug is non-trivial.
Our internal representation for pointer-to-member-data and pointer-to-member-
function is totally different and incompatible, and pt.c isn't ready at all to
convert so freely from one to another. I think we need to patch at least unify
(to handle deduction of ptmf through dependent ptmd), tsubst (to perform the
actual substitution), and convert_nontype_argument (to handle constants ptmf in
the form &A::f passed to template functions).
I doubt any patch for this would qualify for 4.0. Nathan said he has a secret
plan for 4.1, so maybe he can share it with us since it's christmas :)
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |nathan at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19076
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2004-12-19 9:57 [Bug c++/19076] New: Pointer to member function not matched pcarlini at suse dot de
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2004-12-25 18:48 ` giovannibajo at libero dot it
@ 2005-01-20 18:02 ` pinskia at gcc dot gnu dot org
2005-01-21 1:02 ` giovannibajo at libero dot it
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From: pinskia at gcc dot gnu dot org @ 2005-01-20 18:02 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-20 18:02 -------
Patch here: <http://gcc.gnu.org/ml/gcc-patches/2005-01/msg01341.html>.
--
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19076
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2004-12-19 9:57 [Bug c++/19076] New: Pointer to member function not matched pcarlini at suse dot de
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2005-01-20 18:02 ` pinskia at gcc dot gnu dot org
@ 2005-01-21 1:02 ` giovannibajo at libero dot it
2005-01-21 1:05 ` giovannibajo at libero dot it
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From: giovannibajo at libero dot it @ 2005-01-21 1:02 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From giovannibajo at libero dot it 2005-01-21 01:02 -------
Uhm, I wrote a very similar patch in the past only to find out it was not
enough. There is something I cannot understand...
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19076
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2004-12-19 9:57 [Bug c++/19076] New: Pointer to member function not matched pcarlini at suse dot de
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2005-01-21 1:02 ` giovannibajo at libero dot it
@ 2005-01-21 1:05 ` giovannibajo at libero dot it
2005-01-26 10:25 ` pcarlini at suse dot de
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From: giovannibajo at libero dot it @ 2005-01-21 1:05 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From giovannibajo at libero dot it 2005-01-21 01:05 -------
Ah well, I guess this patch is not enough for this:
---------------------------
struct A {
void func(void);
};
template <class T>
void foo(T A::* );
void bar(void) {
foo(&A::func);
}
---------------------------
which is about where I stopped.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19076
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2004-12-19 9:57 [Bug c++/19076] New: Pointer to member function not matched pcarlini at suse dot de
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2005-01-21 1:05 ` giovannibajo at libero dot it
@ 2005-01-26 10:25 ` pcarlini at suse dot de
2005-02-22 4:02 ` cvs-commit at gcc dot gnu dot org
2005-02-22 7:28 ` pcarlini at suse dot de
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From: pcarlini at suse dot de @ 2005-01-26 10:25 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pcarlini at suse dot de 2005-01-26 10:25 -------
New patch here: http://gcc.gnu.org/ml/gcc-patches/2005-01/msg01627.html
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19076
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2004-12-19 9:57 [Bug c++/19076] New: Pointer to member function not matched pcarlini at suse dot de
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2005-01-26 10:25 ` pcarlini at suse dot de
@ 2005-02-22 4:02 ` cvs-commit at gcc dot gnu dot org
2005-02-22 7:28 ` pcarlini at suse dot de
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From: cvs-commit at gcc dot gnu dot org @ 2005-02-22 4:02 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-02-21 23:12 -------
Subject: Bug 19076
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: paolo@gcc.gnu.org 2005-02-21 23:12:28
Modified files:
gcc/cp : ChangeLog cp-tree.h decl.c decl2.c error.c pt.c
tree.c typeck.c
Log message:
2005-02-21 Douglas Gregor <dgregor@cs.indiana.edu>
PR c++/19076
PR c++/6628
* cp-tree.h (cp_apply_type_quals_to_decl): Declared.
* decl.c (grokdeclarator): Pedwarn about qualifying a function
type.
Add qualifiers when declaring a typedef of a function type.
Member function pointers pick up the qualifiers of the typedef
used to declare them.
Don't complain about creating cv-qualified function types.
Complain about qualified function typedefs that are used to
declare non-static member functions or free functions.
Use cp_apply_type_quals_to_decl.
(start_preparsed_function): Use cp_apply_type_quals_to_decl.
(grokclassfn): Use cp_apply_type_quals_to_decl.
* error.c (dump_type_suffix): Print qualifiers for function
types.
* pt.c (tsubst_decl): Use cp_apply_type_quals_to_decl.
(tsubst): When substituting a function type into a member
pointer type, pass along the qualifiers.
(unify): Unify member pointers to member function pointers.
* tree.c (cp_build_qualified_type_real): Function types may be
qualified. This includes restrict qualifiers.
* typeck.c (cp_apply_type_quals_to_decl): New function to replace
use of c_apply_type_quals_to_decl. Drops qualifiers that are being
added to function types.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&r1=1.4639&r2=1.4640
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/cp-tree.h.diff?cvsroot=gcc&r1=1.1104&r2=1.1105
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/decl.c.diff?cvsroot=gcc&r1=1.1366&r2=1.1367
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/decl2.c.diff?cvsroot=gcc&r1=1.767&r2=1.768
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/error.c.diff?cvsroot=gcc&r1=1.275&r2=1.276
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/pt.c.diff?cvsroot=gcc&r1=1.977&r2=1.978
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/tree.c.diff?cvsroot=gcc&r1=1.426&r2=1.427
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/typeck.c.diff?cvsroot=gcc&r1=1.614&r2=1.615
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19076
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2004-12-19 9:57 [Bug c++/19076] New: Pointer to member function not matched pcarlini at suse dot de
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2005-02-22 4:02 ` cvs-commit at gcc dot gnu dot org
@ 2005-02-22 7:28 ` pcarlini at suse dot de
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From: pcarlini at suse dot de @ 2005-02-22 7:28 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pcarlini at suse dot de 2005-02-21 23:50 -------
Fixed for 4.0.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19076
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