Question

Is there a method/pattern/library to do something like that (in pseudo-code):

task_queue.push_back(ObjectType object1, method1); task_queue.push_back(OtherObjectType object2, method2); 

so that I could do the something like:

for(int i=0; i<task_queue.size(); i++) {     task_queue[i].object -> method(); } 

so that it would call:

obj1.method1(); obj2.method2(); 

Or is that an impossible dream?

And if there’s a way to add a number of parameters to call – that would be the best.

Doug T. please see this Excellent answer!

Dave Van den Eynde‘s version works well too.

Answer 1

Yes you would want to combine boost::bind and boost::functions its very powerful stuff.

This version now compiles, thanks to Slava!

#include <boost/function.hpp> #include <boost/bind.hpp> #include <iostream> #include <vector>  class CClass1 { public:     void AMethod(int i, float f) { std::cout << 'CClass1::AMethod(' << i <<');\n'; } };  class CClass2 { public:     void AnotherMethod(int i) { std::cout << 'CClass2::AnotherMethod(' << i <<');\n'; } };  int main() {     boost::function< void (int) > method1, method2;     CClass1 class1instance;     CClass2 class2instance;     method1 = boost::bind(&CClass1::AMethod, class1instance, _1, 6.0) ;     method2 = boost::bind(&CClass2::AnotherMethod, class2instance, _1) ;      // does class1instance.AMethod(5, 6.0)     method1(5);      // does class2instance.AMethod(5)     method2(5);       // stored in a vector of functions...     std::vector< boost::function<void(int)> > functionVec;     functionVec.push_back(method1);     functionVec.push_back(method2);      for ( int i = 0; i < functionVec.size(); ++i)     {                   functionVec[i]( 5);     };     return 0; };