[boost] Proposal: boost.tuple +=

Hi, I am using boost::tuple to accumulate results of computations. I think, supplying operator += (-=) as operator += for each member will be nice. Example: tuple< int, string> abc( 3, "abc" ), de( 2, "de"); abc += de; assert( abc.get<0>() == 5 ); assert( abc.get<1>() == "abcde" );