Untitled

function returning iterator in C
vector<string> types;

// some code here

Iterator Union::types()
{
    return types.iterator();
}

std::vector<string>::iterator Union::types()
{
    return types.begin();
}

std::pair<std::vector<std::string>::iterator,
          std::vector<std::string>::iterator> Union::types()
{
    return std::make_pair(types.begin(), types.end());
}

std::pair<std::vector<std::string>::iterator,
          std::vector<std::string>::iterator> p =  Union::types();

for (; p.first != p.second; p.first++)
{
}

std::vector<string>::iterator Union::begin()
{
  return types.begin();
}

std::vector<string>::iterator Union::end()
{
  return types.end();
}

std::vector<string>::const_iterator Union::begin()const
{
  return types.begin();
}

std::vector<string>::const_iterator Union::end()const
{
  return types.end();
}

std::vector<string>::const_iterator Union::types_begin() const {
  return types.begin();
}

std::vector<string>::const_iterator Union::types_end() const {
  return types.end();
}

std::vector<std::string> types;

// some code here

std::vector<std::string>::iterator Union::returnTheBeginIterator()
{
    return types.begin();
}

std::vector<std::string>::iterator Union::typesBegin()
{
    return types.begin();
}

std::vector<std::string>::iterator Union::typesEnd()
{
    return types.end();
}

// alias, because the full declaration is too long
typedef std::vector<std::string> VecStr ;

void foo(Union & p_union)
{
   VecStr::iterator it = p_union.typesBegin() ;
   VecStr::iterator itEnd = p_union.typesEnd() ;

   for(; it != itEnd; ++it)
   {
       // here, "*it" is the current string item
       std::cout << "The current value is " << *it << ".n" ;
   }
}

void foo(std::vector<std::string> & p_types)
{
   for(std::string & item : p_types)
   {
       // here, "item " is the current string item
       std::cout << "The current value is " << item  << ".n" ;
   }
}

std::vector<std::string> types

std::vector<std::string>::iterator Union::types(){
    return types.begin();
}

class Union
{
std::vector< std::string > types
public:
typedef std::vector< std::string >::iterator iterator;
iterator begin() { return types.begin(); }
iterator end() { return types.end(); }

};