elements in std::set

[l2u]

Hello

I have a simple

std::set<object> someset;

Where object is:

class object {
public:
  void some_function() { }
};

How can I call some_function() for all elements in set container with STD algorithms within one line?

Many thanks in advance!

[Elkvis]

http://www.cplusplus.com/reference/a.../for_each.html

[pheres]

std::for_each( someset.begin(), someset.end(),
               boost::bind( &someset::some_function, _1 ) );

[l2u]

Thanks a lot!

[hk_mp5kpdw]

FYI, the non-boost way (I believe?) would be:

std::for_each(someset.begin(),someset.end(),std::mem_fun_ref(&object::some_function));

I could be a little off there...

std::for_each( someset.begin(), someset.end(),
               boost::bind( &someset::some_function, _1 ) );

I've never used boost before, but are you sure that's right? someset is a set container so does &someset::some_function make sense if some_function is a member function of object? It just looks a little off.

[pheres]

ups, you are right:

std::for_each( someset.begin(), someset.end(),
               boost::bind( &object::some_function, _1 ) );

does it work?

[King Mir]

use mem_fun or mem_fun_ref with for_each:

for_each(container.begin(), container.end(), mem_fun_ref( &object::some_function )  )

[l2u]

use mem_fun or mem_fun_ref with for_each:

for_each(container.begin(), container.end(), mem_fun_ref( &object::some_function )  )

Can you pass function arguments with mem_fun ?

[hk_mp5kpdw]

Let's say that some_function was a member function that accepted an integer as an argument... you could then do (as an example):

std::for_each(someset.begin(),someset.end(),std::bind2nd(std::mem_fun_ref(&object::some_function),4));

Which would effectively call the member function some_function(4) for each object in container someset... if I understand what you're asking.