This is the answer of Exercise #9: No for-loops.

Question #29: GetAllTrue on std::map<int,bool>

Replace the BOOST_FOREACH. You will need:

boost::bind


#include <cassert>

#include <map>

#include <boost/foreach.hpp>



///Returns true if all bools are true

bool GetAllTrue(const std::map<int,bool>& v)

{

  assert(!v.empty());

  typedef std::pair<int,bool> Pair;

  BOOST_FOREACH(const Pair& p,v)

  {

    if (p.second == false) return false;

  }

  return true;

}

Answer using Boost.Bind


#include <algorithm>

#include <cassert>

#include <map>

#include <boost/lambda/bind.hpp>

#include <boost/lambda/lambda.hpp>



///Returns true if all bools are true

bool GetAllTrue(const std::map<int,bool>& v)

{

  return std::find_if(

    v.begin(),

    v.end(),

   boost::lambda::bind(&std::pair<int,bool>::second, boost::lambda::_1) == false)

     == v.end();

}

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(C++) Answer of exercise #9: No for-loops #29

Question #29: GetAllTrue on std::map<int,bool>

Answer using Boost.Bind