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右值引用 (Rvalue Referene) and 转移语义 (Move Sementics) - refer to
http://www.ibm.com/developerworks/cn/aix/library/1307_lisl_c11/
and
http://en.cppreference.com/w/cpp/language/reference
auto
lambda
bind
std::placeholders::_1, std::placeholders::_2, ..., std::placeholders::_N