protected virtual member function
<locale>
std::codecvt::do_unshift
result do_unshift (state_type& state, extern_type* to, extern_type* to_limit, extern_type*& to_next) const;
Unshift translation state [virtual]
Virtual protected member function called by codecvt::unshift to restore a state object to its default state.
Polymorphic derived classes can overwrite the behavior of this function.
See codecvt::unshift for its default behavior in codecvt.