The derived template class describes an object that can serve as a message facet of a given locale, enabling the retrieval of localized messages.
template<class CharType>
    class messages_byname : public messages<CharType> {
public:
    explicit messages_byname(
        const char *_Locname,
        size_t _Refs = 0
    );
    explicit messages_byname(
        const string& _Locname,
        size_t _Refs = 0
    ); 
protected:
    virtual ~messages_byname();
};
Parameters
- _Locname 
 A named locale.
- _Refs 
 An initial reference count.
Remarks
Its behavior is determined by the named locale _Locname. Each constructor initializes its base object with messages<CharType>(_Refs).
Requirements
Header: <locale>
Namespace: std
See Also
Reference
Thread Safety in the Standard C++ Library