status changed; resolution set

olli — Thu, 14 Feb 2013 10:27:53 GMT

status new → closed
resolution → fixed

small fix in code but use 'boost::const_begin()' to create an const_iterator, please

status changed; resolution deleted

Nathan Ridge — Mon, 18 Feb 2013 05:55:31 GMT

status closed → reopened
resolution fixed

What I'm really trying to get to work is code like the following:

#include <iostream>
#include <boost/coroutine/coroutine.hpp>
typedef boost::coroutines::coroutine<int()> coro_t;
void foo(coro_t::caller_type& caller)
{
    caller(0);
    caller(1);
    caller(2);
}
coro_t f()
{
    return coro_t(&foo);
}
template <typename Range>
void print_range(const Range& range)
{
    for (auto element : range)
        std::cout << element;
}
int main()
{
    print_range(f());
}

The C++11 range-based for loop requires either that the range type have a member function named 'begin', or that there exist a non-member function named 'begin' that is found by argument-dependent lookup (i.e. in the same namespace as the range type). In either case, the 'begin' function should have a const version that returns a const iterator.

What that translates to for coroutines is that either coroutine needs to have a member function with the signature "begin() const" or there needs to be a non-member function named "begin" in "boost::coroutines" that takes a "const coroutine&" parameter. (And of course the same for 'end').

status changed; resolution set

olli — Mon, 18 Feb 2013 15:58:35 GMT

status reopened → closed
resolution → fixed

fixed for C++11 too

Boost C++ Libraries: Ticket #8024: Unable to create const_iterator for coroutine

status changed; resolution set

status changed; resolution deleted

status changed; resolution set