coroutine: initial commit

[SVN r81769]

example/fibonacci.cpp

@@ -0,0 +1,43 @@
+
+//          Copyright Oliver Kowalke 2009.
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE_1_0.txt or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
+
+#include <cstdlib>
+#include <iostream>
+
+#include <boost/assert.hpp>
+#include <boost/range.hpp>
+#include <boost/coroutine/all.hpp>
+
+typedef boost::coroutines::coroutine< int() >         coro_t;
+typedef boost::range_iterator< coro_t >::type   iterator_t;
+
+void fibonacci( coro_t::caller_type & c)
+{
+    int first = 1, second = 1;
+    while ( true)
+    {
+        int third = first + second;
+        first = second;
+        second = third;
+        c( third);     
+    }
+}
+
+int main()
+{
+    coro_t c( fibonacci);
+    iterator_t it( boost::begin( c) );
+    BOOST_ASSERT( boost::end( c) != it);
+    for ( int i = 0; i < 10; ++i)
+    {
+        std::cout << * it <<  " ";
+        ++it;
+    }
+
+    std::cout << "\nDone" << std::endl;
+
+    return EXIT_SUCCESS;
+}