LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY, LC_NUMERIC, LC_TIME

 

C++

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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

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

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

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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

 

Defined in header <clocale>
#define LC_ALL      6
#define LC_COLLATE  3
#define LC_CTYPE    0
#define LC_MONETARY 4
#define LC_NUMERIC  1
#define LC_TIME     2

Each of the above macro constants expand to integer constant expressions with distinct values that are suitable for use as the first argument of std::setlocale.

Constant	Explanation
LC_ALL	selects the entire C locale
LC_COLLATE	selects the collation category of the C locale
LC_CTYPE	selects the character classification category of the C locale
LC_MONETARY	selects the monetary formatting category of the C locale
LC_NUMERIC	selects the numeric formatting category of the C locale
LC_TIME	selects the time formatting category of the C locale

Additional macro constants, with names that begin with LC_ followed by at least one uppercase letter, may be defined in <clocale>. For example, the POSIX specification requires LC_MESSAGES (which controls std::perror and std::strerror) and the GNU C library additionally defines LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEASUREMENT, and LC_IDENTIFICATION.

Example

Run this code

#include <stdio.h>
#include <locale.h>
 
int main()
{
    return printf("%d\n%d\n%d\n%d\n%d\n%d\n%d\n%d\n%d\n%d\n%d\n%d\n%d\n", 
                  LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY, LC_MESSAGES, LC_PAPER, LC_NAME,
                  LC_ADDRESS, LC_TELEPHONE, LC_MEASUREMENT,  LC_IDENTIFICATION, LC_NUMERIC,
                  LC_TIME);
}

See also

setlocale	gets and sets the current C locale (function)
locale	set of polymorphic facets that encapsulate cultural differences (class)
C documentation for locale categories