Moves the concrete definition of future_errc
to the auxiliary "detail" namespace, making ADL look in there.
Employs 'using' statements for the reuse of extant
make_error_code and make_error_condition functions, along with
ensuring backward compatibility.
Moves the concrete definition of
future_errcto the auxiliary "detail" namespace, making ADL look in there. Employs 'using' statements for the reuse of extantmake_error_codeandmake_error_conditionfunctions, along with ensuring backward compatibility.