According to the docs this is actually emulating move semantics on the compilers that don't support it. I guess this means that you don't have to have it at th

According to the docs this is actually emulating move semantics on the compilers that don't support it. I guess this means that you don't have to have it at the language level to support unique_ptr, but you do need some form of move semantics at least. I think having it built into the language as a proper feature is preferable personally. https://www.boost.org/doc/libs/1_80_0/doc/html/move/what_is_boost_move.html https://www.boost.org/doc/libs/1_80_0/doc/html/move/what_is_... >Rvalue references are a major C++0x feature, enabling move semantics for C++ values. However, we don't need C++0x compilers to take advantage of move semanatics. Boost.Move emulates C++0x move semantics in C++03 compilers and allows writing portable code that works optimally in C++03 and C++0x compilers.