c++ - std::remove_if using other class method -

i want use std::remove_if predicate member function of differenct calss.

that is

class b;  class {     bool invalidb( const b& b ) const; // use members of class verify b invalid     void somemethod() ; }; 

now, implementing a::somemethod, have

void a::somemethod() {     std::vector< b > vectorb;      // filling elements      // want remove_if vectorb based on predicate a::invalidb     std::remove_if( vectorb.begin(), vectorb.end(), invalidb ) } 

is there way this?

i have looked solution of idiomatic c++ remove_if, deals different case unary predicate of remove_if member of band not a.

moreover,
not have access boost or c++11

thanks!

once you're in remove_if, you've lost this pointer of a. you'll have declare functional object holds it, like:

class isinvalidb {     const* myowner; public:     isinvalidb( const& owner ) : myowner( owner ) {}     bool operator()( b const& obj )     {         return myowner->invalidb( obj );     } } 

just pass instance of remove_if.