Localization library

The locale facility includes internationalization support for character classification and string collation, numeric, monetary, and date/time formatting and parsing, and message retrieval. Locale settings control the behavior of stream I/O, regular expression library, and other components of the C++ standard library.

Locales

Defined in header <locale>
Locales and facets
locale	polymorphic set of facets that comprise a locale (class)
use_facet	obtains a facet from a locale (function template)
has_facet	checks if a locale implements a specific facet (function template)
Character classification
isspace	checks if a character is classified as whitespace by a locale (function template)
iscntrl	checks if a character is classified as a control character by a locale (function template)
isupper	checks if a character is classified as uppercase by a locale (function template)
islower	checks if a character is classified as lowercase by a locale (function template)
isalpha	checks if a character is classified as alphabetic by a locale (function template)
isdigit	checks if a character is classified as a digit by a locale (function template)
ispunct	checks if a character is classified as punctuation by a locale (function template)
isxdigit	checks if a character is classified as a hexadecimal digit by a locale (function template)
isalnum	checks if a character is classified as alphanumeric by a locale (function template)
isprint	checks if a character is classified as printable, including space, by a locale (function template)
isgraph	checks if a character is classfied as printable, excluding space, by a locale (function template)
Character conversions
toupper	converts a character to uppercase using the ctype facet of a locale (function template)
tolower	converts a character to lowercase using the ctype facet of a locale (function template)
String and stream conversions
wstring_convert (C++11)	performs conversions between a wide string and a byte string (class template)
wbuffer_convert (C++11)	performs conversion between a byte stream buffer and a wide stream buffer (class template)
Facet categories
ctype_basectypectype_byname	defines character classification tables (class template)
codecvt_basecodecvtcodecvt_byname	converts between character encodings, including multibyte and wide (class template)
num_get	parses numeric values from an input character sequence (class template)
num_put	formats numeric values for output as character sequence (class template)
numpunctnumpunct_byname	defines numeric punctuation rules (class template)
collatecollate_byname	defines lexicographical comparison and hashing of strings (class template)
time_basetime_gettime_get_byname	parses time/date values from an input character sequence into Template:cpp (class template)
time_puttime_put_byname	formats contents of Template:cpp for output as character sequence (class template)
money_get	parses and constructs a monetary value from an input character sequence (class template)
money_put	formats a monetary value for output as a character sequence (class template)
money_basemoneypunctmoneypunct_byname	defines monetary formatting parameters used by Template:cpp and Template:cpp (class template)
messages_basemessagesmessages_byname	implements retrieval of strings from message catalogs (class)

Standard code conversion facets

Defined in header <codecvt>
codecvt_utf8 (C++11)	converts between UTF8 and UCS2/UCS4 (class template)
codecvt_utf16 (C++11)	converts between UTF16 and UCS2/UCS4 (class template)
codecvt_utf8_utf16 (C++11)	converts between UTF8 and UTF16 (class template)
codecvt_mode (C++11)	tags to alter behavior of the standard codecvt facets (class)

C library locales

Template:cpp/locale/dcl list setlocale

Defined in header <clocale>
LC_ALL	full locale category for Template:cpp (macro constant)
LC_COLLATE	string comparison locale category for Template:cpp (macro constant)
LC_CTYPE	character classification locale category for Template:cpp (macro constant)
LC_MONETARY	monetary formatting locale category for Template:cpp (macro constant)
LC_NUMERIC	nonmonetary numeric formatting locale category for Template:cpp (macro constant)
LC_TIME	time formatting locale category for Template:cpp (macro constant)
localeconv	queries numeric and monetary formatting details of the current locale (function)
lconv	formatting details, returned by Template:cpp (class)