[bind] Member fn has defeated me
void foo(bool){} struct X { void f(bool b) {} } class Bar { typedef void (*pf)(bool); public: Bar(pf fn){ fn(true); } }; int main( int argc, char **argv ) { Bar bar_(foo); // ok. X x; Bar bar_(boost::bind(&X::f, &x)()); // compile fails. /*LOTS* of other failed attempts with various errors. 8( return(0); } <error_msg edited=yes instance="one of many"> error: no matching function for call to 'X::x()' candidates are: void X::x(bool). </error_msg> I've been reduced to [shudder] "...trying things." I'm simply trying to construct one class by passing in a function pointer (that happes to be a class member). Could someone point me in the right direction? Regards, Dick Bridges
BRIDGES Dick wrote:
class Bar { typedef void (*pf)(bool);
If you make this typedef boost::function<void(bool)> pf;
public: Bar(pf fn){ fn(true); } };
int main( int argc, char **argv ) {
Bar bar_(foo); // ok.
X x; Bar bar_(boost::bind(&X::f, &x)()); // compile fails.
then Bar bar_( boost::bind(&X::f, &x) ); should work. But you can't get an oridnary function pointer from boost::bind; a function pointer doesn't have enough state to represent &X::f + &x.
participants (2)
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BRIDGES Dick -
Peter Dimov