30 Localization library [localization]

30.4 Standard locale categories [locale.categories]

30.4.8 The message retrieval category [category.messages]

30.4.8.2 Class template messages [locale.messages]

30.4.8.2.2 Members [locale.messages.members]

catalog open(const string& name, const locale& loc) const;
Returns: do_­open(name, loc).
string_type get(catalog cat, int set, int msgid, const string_type& dfault) const;
Returns: do_­get(cat, set, msgid, dfault).
void close(catalog cat) const;
Effects: Calls do_­close(cat).