protected virtual member function
<locale>
std::numpunct::do_truename
string_type do_truename() const;
Return string representing true [virtual]
Virtual protected member function called by numpunct::truename to obtain the string used to represent the boolean value true.
Polymorphic derived classes can overwrite the behavior of this function.
See numpunct::truename for its default behavior in numpunct's standard specializations.