| Defined in header <locale> | ||
|---|---|---|
template< class CharT > class messages_byname : public std::messages<CharT>; |
std::messages_byname is a std::messages facet which encapsulates retrieval of strings from message catalogs of the locale specified at its construction.
Two specializations are provided by the standard library.
| Defined in header <locale> | |
|---|---|
std::messages_byname<char> | narrow/multibyte message catalog access |
std::messages_byname<wchar_t> | wide string message catalog access |
Member types
| Member type | Definition |
|---|---|
catalog | std::messages_base<CharT>::catalog |
string_type | std::basic_string<CharT> |
Member functions
| (constructor) | constructs a new messages_byname facet (public member function) |
| (destructor) | destroys a messages_byname facet (protected member function) |
std::messages_byname::messages_byname
explicit messages_byname( const char* name, std::size_t refs = 0 ); | ||
explicit messages_byname( const std::string& name, std::size_t refs = 0 ); | (since C++11) |
Constructs a new std::messages_byname facet for a locale with name.
refs is used for resource management: if refs == 0, the implementation destroys the facet, when the last std::locale object holding it is destroyed. Otherwise, the object is not destroyed.
Parameters
| name | - | the name of the locale |
| refs | - | the number of references that link to the facet |
std::messages_byname::~messages_byname
protected: ~messages_byname(); |
Destroys the facet.
Inherited from std::messages
Member types
| Member type | Definition |
|---|---|
char_type | charT |
string_type | std::basic_string<charT> |
Member objects
| Member name | Type |
|---|---|
id (static) | std::locale::id |
Member functions
invokes do_open (public member function of std::messages) | |
invokes do_get (public member function of std::messages) | |
invokes do_close (public member function of std::messages) |
Protected member functions
| [virtual] | opens a named message catalog (virtual protected member function of std::messages) |
| [virtual] | retrieves a message from an open message catalog (virtual protected member function of std::messages) |
| [virtual] | closes a message catalog (virtual protected member function of std::messages) |
Example
#include <iostream>
#include <locale>
void try_with(const std::locale& loc)
{
const std::messages<char>& facet = std::use_facet<std::messages<char> >(loc)
;
std::messages<char>::catalog cat = facet.open("sed", std::cout.getloc());
if(cat < 0 )
std::cout << "Could not open \"sed\" message catalog\n";
else
std::cout << "\"No match\" "
<< facet.get(cat, 0, 0, "No match") << '\n'
<< "\"Memory exhausted\" "
<< facet.get(cat, 0, 0, "Memory exhausted") << '\n';
facet.close(cat);
}
int main()
{
std::locale loc("en_US.utf8");
std::cout.imbue(loc);
try_with(std::locale(loc, new std::messages_byname<char>("de_DE.utf8")));
try_with(std::locale(loc, new std::messages_byname<char>("fr_FR.utf8")));
try_with(std::locale(loc, new std::messages_byname<char>("ja_JP.utf8")));
}Possible output:
"No match" Keine Übereinstimmung "Memory exhausted" Speicher erschöpft "No match" Pas de concordance "Memory exhausted" Mémoire épuisée "No match" 照合しません "Memory exhausted" メモリーが足りません
See also
| implements retrieval of strings from message catalogs (class template) |
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