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C++ Parser problem or I need glasses - template pointer to memberparameters
- From: Gianni Mariani <gmariani at chaincast dot com>
- To: gcc at gcc dot gnu dot org
- Date: Sun, 27 Apr 2003 07:43:52 -0700
- Subject: C++ Parser problem or I need glasses - template pointer to memberparameters
- Organization: Chaincast, Inc
- Reply-to: gmariani at chaincast dot com
The lines in question are:
i_1->A::TFUNC_A<w_a,w_b>( m_b1 );
i_1->TFUNC_A<w_a,w_b>( m_b1 ); // compiler trubbell
without the A:: it seems like it fails to parse.
Time for a bug report ?
Apparently MSVC++ 7.0 and Borland compiles it fine confirmed by Rob
Williscroft on news:comp.lang.c++
MSVC++ 6.0sp5 dumps an internal compiler error.
On the code below GCC 3.2.1 gives the following message:
g++ tt2.cpp -o tt2
tt2.cpp: In member function `void Zoo::B::TFUNC_B(Zoo::A*) [with
Zoo::A*Zoo::A::*w_a = &Zoo::A::m_mem1, Zoo::A*Zoo::B::*w_b =
&Zoo::B::m_b1]':
tt2.cpp:68: instantiated from here
tt2.cpp:54: invalid use of member (did you forget the `&' ?)
tt2.cpp:54: comparison between distinct pointer types `Zoo::A*Zoo::B::*'
and `
Zoo::A*' lacks a cast
make: *** [tt2] Error 1
class Zoo
{
public:
class B;
class A
{
public:
A * m_mem1;
A * m_mem2;
template <
A * A::* w_a,
A * B::* w_b
>
void TFUNC_A( A * i_1 )
{
i_1->*w_a = i_1;
}
typedef void ( A::* F_TA )( A * i_1 );
};
class B
{
public:
A * m_b1;
A * m_b2;
typedef void ( B::* F_TB )( A * i_1 );
template <
A * A::* w_a,
A * B::* w_b
>
void TFUNC_B( A * i_1 )
{
static const A::F_TA gg = ( & A::TFUNC_A<w_a,w_b> );
( i_1->*gg )( m_b1 );
i_1->A::TFUNC_A<w_a,w_b>( m_b1 );
i_1->TFUNC_A<w_a,w_b>( m_b1 ); // compiler trubbel
}
void Fooey( A * i_1 )
{
// static A * A::* const l_mem1 = &A::m_mem1;
// static A * B::* const l_b1 = &B::m_b1;
// this->TFUNC_B< l_mem1, l_b1 >( i_1 );
// static const F_TB gg = &B::TFUNC_B< l_mem1, l_b1 >;
// static const F_TB gg = &B::TFUNC_B< (&A::m_mem1),
(&B::m_b1) >;
// (this->*gg)( i_1 );
this->TFUNC_B< &A::m_mem1, &B::m_b1 >( i_1 );
}
};
};
int main()
{
Zoo::A a[1];
Zoo::B b[1];
b->Fooey( a );
return 0;
}