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Instead of defining is_reference in terms of is_[lr]value_reference, just define it directly. libstdc++-v3/ChangeLog: * include/std/type_traits (is_reference): Make the primary template derive from false_type. Define two partial specializations that derive from true_type.
file: libstdc++-v3/README New users may wish to point their web browsers to the file index.html in the 'doc/html' subdirectory. It contains brief building instructions and notes on how to configure the library in interesting ways.