id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
8102	signals2 is trying to use std::get with boost::tuple	Eric Niebler	Frank Mori Hess	"`signals2/detail/variadic_slot_invoker.hpp` has the following:

{{{
// if compiler has std::tuple use it instead of boost::tuple
// because boost::tuple does not have variadic template support at present.
#ifdef BOOST_NO_CXX11_HDR_TUPLE
#include <boost/tuple/tuple.hpp>
#define BOOST_SIGNALS2_TUPLE boost::tuple
#else
#include <tuple>
#define BOOST_SIGNALS2_TUPLE std::tuple
#endif
}}}

Then in place of `boost::tuple` or `std::tuple`, it uses `BOOST_SIGNALS2_TUPLE`. That's dandy, but it unconditionally uses `std::get` to access elements from the tuple. This naturally leads to compile failures because `std::get` doesn't know what a `boost::tuple` is.

Patch attached."	Bugs	closed	Boost 1.54.0	signals2	Boost Development Trunk	Problem	fixed