Ticket #3322: fusion_test.cc

#include <boost/fusion/adapted/struct/adapt_struct.hpp>
#include <boost/fusion/container/vector/vector.hpp>
#include <boost/fusion/algorithm/query/find.hpp>

#include <boost/type_traits.hpp>

#include <string>
#include <iostream>

namespace b = boost;
namespace bf = boost::fusion;

namespace demo
{
    struct employee
    {
        std::string name;
        int age;
    };
}

// demo::employee is now a Fusion sequence
BOOST_FUSION_ADAPT_STRUCT(
    demo::employee,
    (std::string, name)
    (int, age))

int main(void)
{
  typedef bf::vector<int,float> V1;

  // Find against non-const V1
  V1 v1(1,2.0);

  BOOST_MPL_ASSERT_NOT(( b::is_same<bf::result_of::find<V1,int>::type,bf::result_of::end<V1>::type> ));

  assert(*bf::find<int>(v1) == 1);


  // Find against const V1
  const V1 const_v1(3,4.0);

  BOOST_MPL_ASSERT_NOT(( b::is_same<bf::result_of::find<const V1,int>::type,bf::result_of::end<const V1>::type> ));

  assert(*bf::find<int>(const_v1) == 3);

  // Find against non-const employee
  demo::employee e1 = {"Foo",18};

  BOOST_MPL_ASSERT_NOT(( b::is_same<bf::result_of::find<demo::employee,int>::type,bf::result_of::end<demo::employee>::type> ));

  assert(*bf::find<int>(e1) == 18);

  // Find against const employee
  const demo::employee const_e1 = {"Bar",21};

#if 0
  BOOST_MPL_ASSERT_NOT(( b::is_same<bf::result_of::find<const demo::employee,int>::type,bf::result_of::end<const demo::employee>::type> ));

  assert(*bf::find<int>(const_e1) == 21);
#else
  // note that the find key is a const int 
  BOOST_MPL_ASSERT_NOT(( b::is_same<bf::result_of::find<const demo::employee,const int>::type,bf::result_of::end<const demo::employee>::type> ));

  assert(*bf::find<const int>(const_e1) == 21);
#endif

  return 0;
}