They seem to be more robust, but boost::future::then() has weird design that makes it all but useless for real-life use. They return the same kind of future tha

They seem to be more robust, but boost::future::then() has weird design that makes it all but useless for real-life use. They return the same kind of future that std::async() does, i.e. its destructor blocks until the future is ready. In other words, you can't write "fire and forget" code: void run_and_report() { something_long_running() .then([=]{ report_results() }); } // blocks here until the then() block executes