[Bug c++/52453] New: compiling error when get address of a virtual function(invalid use of non-static member function)

2012-03-01 Thread wildpointercs at gmail dot com 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52453

 Bug #: 52453
   Summary: compiling error when get address of a virtual
function(invalid use of non-static member function)
Classification: Unclassified
   Product: gcc
   Version: 4.2.4
Status: UNCONFIRMED
  Severity: normal
  Priority: P3
 Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: wildpointe...@gmail.com


Version:gcc4.2.4,
System :Ubuntu Linux 2.6.24

The preprocessed file:

# 1 "test.cpp"
# 1 ""
# 1 ""
# 1 "test.cpp"

class Test
{
public:
virtual void func(char *p){}
};

int main()
{
typedef void (Test::*pTestfunc)(char *);
pTestfunc pf = &(Test::func); // error here.
}

Error message: invalid use of non-static member function 'virtual void
Test::func(char *)'

[Bug c++/52453] compiling error when get address of a virtual function(invalid use of non-static member function)

2012-03-01 Thread wildpointercs at gmail dot com 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52453

--- Comment #2 from Allen Wu  2012-03-01 
16:40:07 UTC ---
Thank you for your response.
But I cannot see any difference between &Test::func and &(Test::func). Does
C++ standard specify &(Test::func) is illegal?
Thanks in advance.

Allen
2012/3/2 redi at gcc dot gnu.org 

> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52453
>
> Jonathan Wakely  changed:
>
>   What|Removed |Added
>
> 
> Status|UNCONFIRMED |RESOLVED
> Resolution||INVALID
>
> --- Comment #1 from Jonathan Wakely  2012-03-01
> 16:34:29 UTC ---
> GCC 4.2 is no longer supported, but it doesn't matter because your code is
> invalid anyway.
>
> To take the address of a member function you must not use parentheses
> around
> the expression:
>
>pTestfunc pf = &Test::func;
>
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