Re: what is wrong with this code?
terry wrote:
This code does not compile unless the second call (at *************) to the
template function is commented out. It causes fatal error C1001: An internal
error has occurred in the compiler in VS2008.
What part of the standard am I violating? Thanks! Is there a work around?
(posted a similar question earlier but perhaps there was too much verbiage -
it would help to know which errors I am making!)
Terry
void f ( void ) {}
struct B
{
void f ( void ) {}
typedef void (B::*mfn_t)( void );
};
template <typename T>
void loop( T fn )
{
fn();
};
int main(int argc, char* argv[])
{
loop(::f); //loop works OK
B::mfn_t mfn(&B::f);
B* pobject = new B;
((pobject)->*(mfn)) (); //member function B::f on instance
*pobject can be accessed OK
//******************************
loop(((pobject)->*(mfn))); // comment out to get correct compilation
//******************************
delete pobject;
return 0;
}
The result of operators .* and ->* does not have a type. It's an anomaly
and the only place in C++ where an expression does not have a type. All
you can do with the result of these operators is apply the function
operator call to it immediately.
Andrei
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