std::messages

 

C++

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Technical specifications

Symbols index

External libraries

 

Localization library

Locales and facets
Locales
has_facet use_facet	locale
Facet category base classes
ctype_base codecvt_base messages_base	time_base money_base
ctype facets
ctype ctype<char> ctype_byname	codecvt codecvt_byname
numeric facets
num_get num_put	numpunct numpunct_byname
collate facets
collate	collate_byname
time facets
time_get time_put	time_get_byname time_put_byname
monetary facets
money_get money_put	moneypunct moneypunct_byname
messages facets
messages	messages_byname

Character classification and conversion
Character classification
isspace isblank (C++11) iscntrl	isupper islower isalpha	ispunct isdigit isxdigit	isalnum isprint isgraph

Character conversions

toupper

tolower

String and stream conversions

wstring_convert (C++11/17/26*)

wbuffer_convert (C++11/17/26*)

Text encoding identifications

text_encoding (C++26)

Unicode conversion facets

codecvt_utf8 (C++11/17/26*)

codecvt_utf16 (C++11/17/26*)

codecvt_utf8_utf16 (C++11/17/26*)

codecvt_mode (C++11/17/26*)

C library locales
LC_ALLLC_COLLATELC_CTYPELC_MONETARYLC_NUMERICLC_TIME	setlocale localeconv lconv

 

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

Specializations

The standard library is guaranteed to provide the following specializations (they are required to be implemented by any locale object):

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

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 */

See also

messages_base	defines messages catalog type (class)
messages_byname	represents the system-supplied std::messages for the named locale (class template)