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1e491533fa
Was getting a weird test failure for Visual C++ 11, BOOST_NO_CXX11_HDR_TUPLE is defined, so the code doesn't support std::tuple, but BOOST_UNORDERED_HAVE_PIECEWISE_CONSTRUCT was also true, and so there are functions for constructing using std::piecewise_construct/std::tuple, which don't work. So, I'm assuming that if BOOST_UNORDERED_HAVE_PIECEWISE_CONSTRUCT is true, then there must be a std::tuple. I guess it doesn't have full C++11 support, which is why BOOST_NO_CXX11_HDR_TUPLE is defined, but it appears to be good enough for us. If not, this will break things.