https://codebrowser.dev/boost/boost/libs/foreach/test/rvalue_nonconst.cpp.html
rvalue_nonconst.cpp source code [boost/libs/foreach/test/rvalue_nonconst.cpp] - Codebrowser
Source code of boost/libs/foreach/test/rvalue_nonconst.cpp boost 1.85.0 on KDAB Codebrowser
source codervaluecppboostlibs
https://c-cpp.com/cpp/types/add_reference
std::add_lvalue_reference, std::add_rvalue_reference_C++中文网
lvalue referencestdaddrvalue
https://timsong-cpp.github.io/cppwp/n4140/istream.rvalue
[istream.rvalue]
istreamrvalue