std::messages

 

C++

Language

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Concepts

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Regular expressions library (C++11)

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Filesystem library (C++17)

Technical Specifications

 

Localizations library

Locales and facets
locale
use_facet	has_facet
Character classification
isspace isblank (C++11) iscntrl isupper islower isalpha	isdigit ispunct isxdigit isalnum isprint isgraph
Conversions
toupper tolower	wstring_convert (C++11) wbuffer_convert (C++11)
Facet category base classes
ctype_base codecvt_base messages_base	time_base money_base
Facet categories
ctype ctype<char> codecvt collate messages time_get time_put	num_get num_put numpunct money_get money_put moneypunct
Locale-specific facets
ctype_byname codecvt_byname messages_byname collate_byname	time_get_byname time_put_byname numpunct_byname moneypunct_byname
Code conversion facets
codecvt_utf8 (C++11) codecvt_utf16 (C++11)	codecvt_utf8_utf16 (C++11) codecvt_mode (C++11)
C locale
setlocale localeconv lconv	LC_ALLLC_COLLATELC_CTYPELC_MONETARYLC_NUMERICLC_TIME

 

std::messages

Member functions

messages::messages

messages::~messages

messages::openmessages::do_open

messages::getmessages::do_get

messages::closemessages::do_close

 

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	int

See also

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