std::messages

Defined in header `<locale>`
template< class CharT > class messages;

Class template std::messages is a standard locale facet that encapsulates retrieval of strings from message catalogs, such as the ones provided by GNU gettext or by POSIX catgets.

The source of the messages is implementation-defined.

Inheritance diagram.

Two standalone (locale-independent) specializations are provided by the standard library:

Defined in header `<locale>`
`std::messages<char>`	accesses narrow string message catalog
`std::messages<wchar_t>`	accesses wide string message catalog

In addition, every locale object constructed in a C++ program implements its own (locale-specific) versions of these specializations.

Member types

Member type	Definition
`char_type`	`CharT`
`string_type`	`std::basic_string<CharT>`

Member functions

(constructor)	constructs a new messages facet (public member function)
(destructor)	destructs a messages facet (protected member function)
open	invokes `do_open` (public member function)
get	invokes `do_get` (public member function)
close	invokes `do_close` (public member function)

Member objects

static std::locale::id id

id of the locale
(public member object)

Protected member functions

do_open [virtual]	opens a named message catalog (virtual protected member function)
do_get [virtual]	retrieves a message from an open message catalog (virtual protected member function)
do_close [virtual]	closes a message catalog (virtual protected member function)

Inherited from std::messages_base

Type	Definition
`catalog`	`/unspecified signed integer type/`

messages_base	defines messages catalog type (class template)
messages_byname	creates a messages facet for the named locale (class template)