If I change the parameter of first_pipe to "T & cont" this code
compiles. As it stands I get this error on the lambda part of the
algorithm call.
Error 1 error C2664:
'std::list<_Ty>::_Iterator<_Secure_validation>::_Iterator(const
std::list<_Ty>::_Iterator<_Secure_validation> &)' : cannot convert
parameter 1 from 'std::list<_Ty>::_Const_iterator<_Secure_validation>'
to 'const std::list<_Ty>::_Iterator<_Secure_validation> &'
How can I adjust my usage so that the lambda function construction
resolves the correct constness and will accept the const iterator?
Thanks....code follows.
#include <iostream>
#include <list>
#include
#include
#include
#include
namespace esi
{
namespace metafunc
{
template < typename T >
struct dereference_type { typedef T type; };
template < typename T >
struct dereference_type< T* > { typedef T type; };
template < typename T >
struct dereference_type< boost::shared_ptr< T > > { typedef T type; };
}
}
template < typename T >
typename T::iterator first_pipe(T const& cont)
{
namespace l = boost::lambda;
typedef esi::metafunc::dereference_type::type value_type;
return std::find_if(cont.begin(), cont.end(),
l::bind(&value_type::GetType, l::_1) == DT_PIPE);
}
enum DT_TYPE { DT_PUMP, DT_PIPE };
struct mock_pipe
{
bool pipe;
mock_pipe(bool b) : pipe(b) {}
DT_TYPE GetType() const {
return pipe ? DT_PIPE : DT_PUMP;
}
};
void test_first_pipe()
{
typedef std::list list1_t;
std::list l;
l.push_back(new mock_pipe(false));
l.push_back(new mock_pipe(false));
l.push_back(new mock_pipe(false));
list1_t::iterator fit = first_pipe(l);
}
int main(void)
{
test_first_pipe();
}
