On 4/5/2012 2:32 AM, Igor R wrote:
Can you provide a trivial example that reproduces the issue?
#include "boost/test/unit_test.hpp" #include "boost/thread/future.hpp" #include "boost/utility/result_of.hpp" #include <functional> struct async_func { virtual ~async_func() { } virtual void run() =0; }; template <typename Ret> class async_func_pt : public async_func { boost::packaged_task<Ret> f; public: void run() override { f(); } async_func_pt (boost::packaged_task<Ret>&& f) : f(std::move(f)) {} ~async_func_pt() { } boost::unique_future<Ret> get_future() { return f.get_future(); } }; void async_core (async_func* p); template <typename F> boost::unique_future<typename boost::result_of< F() >::type> async (F&& f) { typedef typename boost::result_of< F() >::type RetType; async_func_pt<RetType>* p= new async_func_pt<RetType> (boost::packaged_task<RetType>(f)); boost::unique_future<RetType> future_result= p->get_future(); async_core (p); return std::move(future_result); } template <typename F, typename A1> boost::unique_future<typename boost::result_of< F(A1) >::type> async (F&& f, A1&& a1) { // This should be all it needs. But get a funny error deep inside Boost. // problem overloading with && ? return async (std::tr1::bind(f,a1)); } BOOST_AUTO_TEST_SUITE(thread_pool_tests) int calculate_the_answer_to_life_the_universe_and_everything() { return 42; } size_t foo (const std::string& s) { return s.size(); } BOOST_AUTO_TEST_CASE( async_test ) { // this one works // most fundimental form: boost::unique_future<int> fi= async (&calculate_the_answer_to_life_the_universe_and_everything); int i= fi.get(); BOOST_CHECK_EQUAL (i, 42); // This one chokes at compile time boost::unique_future<size_t> fut_1= async (&foo, "Life"); BOOST_CHECK_EQUAL (fut_1.get(), 4); } BOOST_AUTO_TEST_SUITE_END()