Re: Re: boost::lambda::select2nd

From: Markus Werle (yg-boost-users_at_[hidden])
Date: 2003-06-27 03:50:17

<posted & mailed>

Markus Werle wrote:

> OK, that's a solution.

No it is not :-(
still having problems with template functions:

#include <iostream>
#include <string>
#include <vector>
#include <map>
#include <algorithm>

#include "boost/lambda/lambda.hpp"
#include "boost/lambda/if.hpp"
#include "boost/lambda/exceptions.hpp"
#include "boost/lambda/casts.hpp"
#include "boost/lambda/algorithm.hpp"
#include "boost/lambda/bind.hpp"

#include "boost/mpl/select2nd.hpp"

template <class T>
inline 
std::string Foo(const T& t) {}

template<class It, class F> void for_each_pair(It first, It last, F f)
{
    for(; first != last; ++first) f(first->first, first->second);
}

double Double(double d) { return 2.0 * d; }

int main()
{
  namespace l = boost::lambda;
  std::map<int, double> M;
  M[1] = 5.0;
  M[3] = 7.0;

  for_each_pair(M.begin(), M.end(), 
                l::bind(&Double, l::_2));

  // THIS HERE FAILS TO COMPILE!
  for_each_pair(M.begin(), M.end(), 
                l::bind(&Foo<std::string>, l::_2));

}

Markus

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