Provided by: libstdc++-10-doc_10.4.0-5ubuntu2_all 
NAME
std::locale - Container class for localization functionality.
SYNOPSIS
Classes
class facet
Localization functionality base class.
class id
Facet ID class.
Public Types
typedef int category
Definition of locale::category.
Public Member Functions
locale () throw ()
Default constructor.
locale (const char *__s)
Named locale constructor.
locale (const locale &__base, const char *__s, category __cat)
Construct locale with facets from another locale.
locale (const locale &__base, const locale &__add, category __cat)
Construct locale with facets from another locale.
locale (const locale &__base, const std::string &__s, category __cat)
Construct locale with facets from another locale.
locale (const locale &__other) throw ()
Copy constructor.
template<typename _Facet > locale (const locale &__other, _Facet *__f)
Construct locale with another facet.
locale (const std::string &__s)
Named locale constructor.
~locale () throw ()
Locale destructor.
template<typename _Facet > locale combine (const locale &__other) const
Construct locale with another facet.
_GLIBCXX_DEFAULT_ABI_TAG string name () const
Return locale name.
bool operator!= (const locale &__other) const throw ()
Locale inequality.
template<typename _Char , typename _Traits , typename _Alloc > bool operator() (const
basic_string< _Char, _Traits, _Alloc > &__s1, const basic_string< _Char, _Traits,
_Alloc > &__s2) const
Compare two strings according to collate.
template<typename _CharT , typename _Traits , typename _Alloc > bool operator() (const
basic_string< _CharT, _Traits, _Alloc > &__s1, const basic_string< _CharT, _Traits,
_Alloc > &__s2) const
const locale & operator= (const locale &__other) throw ()
Assignment operator.
bool operator== (const locale &__other) const throw ()
Locale equality.
Static Public Member Functions
static const locale & classic ()
Return reference to the C locale.
static locale global (const locale &__loc)
Set global locale.
Static Public Attributes
static const category none
Category values.
static const category ctype
Category values.
static const category numeric
Category values.
static const category collate
Category values.
static const category time
Category values.
static const category monetary
Category values.
static const category messages
Category values.
static const category all
Category values.
Friends
template<typename _Cache > struct __use_cache
class _Impl
class facet
template<typename _Facet > bool has_facet (const locale &) throw ()
Test for the presence of a facet.
template<typename _Facet > const _Facet & use_facet (const locale &)
Return a facet.
Detailed Description
Container class for localization functionality.
The locale class is first a class wrapper for C library locales. It is also an extensible
container for user-defined localization. A locale is a collection of facets that implement
various localization features such as money, time, and number printing.
Constructing C++ locales does not change the C library locale.
This library supports efficient construction and copying of locales through a reference
counting implementation of the locale class.
Definition at line 62 of file locale_classes.h.
Member Typedef Documentation
typedef int std::locale::category
Definition of locale::category.
Definition at line 67 of file locale_classes.h.
Constructor & Destructor Documentation
std::locale::locale ()
Default constructor. Constructs a copy of the global locale. If no locale has been
explicitly set, this is the C locale.
std::locale::locale (const locale & __other)
Copy constructor. Constructs a copy of other.
Parameters
__other The locale to copy.
std::locale::locale (const char * __s) [explicit]
Named locale constructor. Constructs a copy of the named C library locale.
Parameters
__s Name of the locale to construct.
Exceptions
std::runtime_error if __s is null or an undefined locale.
std::locale::locale (const locale & __base, const char * __s, category __cat)
Construct locale with facets from another locale. Constructs a copy of the locale base.
The facets specified by cat are replaced with those from the locale named by s. If base is
named, this locale instance will also be named.
Parameters
__base The locale to copy.
__s Name of the locale to use facets from.
__cat Set of categories defining the facets to use from __s.
Exceptions
std::runtime_error if __s is null or an undefined locale.
std::locale::locale (const std::string & __s) [inline], [explicit]
Named locale constructor. Constructs a copy of the named C library locale.
Parameters
__s Name of the locale to construct.
Exceptions
std::runtime_error if __s is an undefined locale.
Definition at line 163 of file locale_classes.h.
std::locale::locale (const locale & __base, const std::string & __s, category __cat) [inline]
Construct locale with facets from another locale. Constructs a copy of the locale base.
The facets specified by cat are replaced with those from the locale named by s. If base is
named, this locale instance will also be named.
Parameters
__base The locale to copy.
__s Name of the locale to use facets from.
__cat Set of categories defining the facets to use from __s.
Exceptions
std::runtime_error if __s is an undefined locale.
Definition at line 177 of file locale_classes.h.
std::locale::locale (const locale & __base, const locale & __add, category __cat)
Construct locale with facets from another locale. Constructs a copy of the locale base.
The facets specified by cat are replaced with those from the locale add. If base and add
are named, this locale instance will also be named.
Parameters
__base The locale to copy.
__add The locale to use facets from.
__cat Set of categories defining the facets to use from add.
template<typename _Facet > std::locale::locale (const locale & __other, _Facet * __f)
Construct locale with another facet. Constructs a copy of the locale __other. The facet
__f is added to __other, replacing an existing facet of type Facet if there is one. If __f
is null, this locale is a copy of __other.
Parameters
__other The locale to copy.
__f The facet to add in.
Definition at line 44 of file locale_classes.tcc.
std::locale::~locale ()
Locale destructor.
Member Function Documentation
static const locale& std::locale::classic () [static]
Return reference to the C locale.
template<typename _Facet > locale std::locale::combine (const locale & __other) const
Construct locale with another facet. Constructs and returns a new copy of this locale.
Adds or replaces an existing facet of type Facet from the locale other into the new
locale.
Template Parameters
_Facet The facet type to copy from other
Parameters
__other The locale to copy from.
Returns
Newly constructed locale.
Exceptions
std::runtime_error if __other has no facet of type _Facet.
Definition at line 62 of file locale_classes.tcc.
static locale std::locale::global (const locale & __loc) [static]
Set global locale. This function sets the global locale to the argument and returns a copy
of the previous global locale. If the argument has a name, it will also call
std::setlocale(LC_ALL, loc.name()).
Parameters
__loc The new locale to make global.
Returns
Copy of the old global locale.
_GLIBCXX_DEFAULT_ABI_TAG string std::locale::name () const
Return locale name.
Returns
Locale name or '*' if unnamed.
bool std::locale::operator!= (const locale & __other) const [inline]
Locale inequality.
Parameters
__other The locale to compare against.
Returns
! (*this == __other)
Definition at line 265 of file locale_classes.h.
References operator==().
template<typename _Char , typename _Traits , typename _Alloc > bool std::locale::operator()
(const basic_string< _Char, _Traits, _Alloc > & __s1, const basic_string< _Char, _Traits,
_Alloc > & __s2) const
Compare two strings according to collate. Template operator to compare two strings using
the compare function of the collate facet in this locale. One use is to provide the locale
to the sort function. For example, a vector v of strings could be sorted according to
locale loc by doing:
std::sort(v.begin(), v.end(), loc);
Parameters
__s1 First string to compare.
__s2 Second string to compare.
Returns
True if collate<_Char> facet compares __s1 < __s2, else false.
const locale& std::locale::operator= (const locale & __other)
Assignment operator. Set this locale to be a copy of other.
Parameters
__other The locale to copy.
Returns
A reference to this locale.
bool std::locale::operator== (const locale & __other) const
Locale equality.
Parameters
__other The locale to compare against.
Returns
True if other and this refer to the same locale instance, are copies, or have the same
name. False otherwise.
Referenced by operator!=().
Friends And Related Function Documentation
template<typename _Facet > bool has_facet (const locale &) [friend]
Test for the presence of a facet. has_facet tests the locale argument for the presence of
the facet type provided as the template parameter. Facets derived from the facet parameter
will also return true.
Template Parameters
_Facet The facet type to test the presence of.
Parameters
__loc The locale to test.
Returns
true if __loc contains a facet of type _Facet, else false.
Definition at line 104 of file locale_classes.tcc.
template<typename _Facet > const _Facet& use_facet (const locale &) [friend]
Return a facet. use_facet looks for and returns a reference to a facet of type Facet where
Facet is the template parameter. If has_facet(locale) is true, there is a suitable facet
to return. It throws std::bad_cast if the locale doesn't contain a facet of type Facet.
Template Parameters
_Facet The facet type to access.
Parameters
__loc The locale to use.
Returns
Reference to facet of type Facet.
Exceptions
std::bad_cast if __loc doesn't contain a facet of type _Facet.
Definition at line 132 of file locale_classes.tcc.
Member Data Documentation
const category std::locale::all [static]
Category values. The standard category values are none, ctype, numeric, collate, time,
monetary, and messages. They form a bitmask that supports union and intersection. The
category all is the union of these values.
NB: Order must match _S_facet_categories definition in locale.cc
Definition at line 105 of file locale_classes.h.
const category std::locale::collate [static]
Category values. The standard category values are none, ctype, numeric, collate, time,
monetary, and messages. They form a bitmask that supports union and intersection. The
category all is the union of these values.
NB: Order must match _S_facet_categories definition in locale.cc
Definition at line 101 of file locale_classes.h.
const category std::locale::ctype [static]
Category values. The standard category values are none, ctype, numeric, collate, time,
monetary, and messages. They form a bitmask that supports union and intersection. The
category all is the union of these values.
NB: Order must match _S_facet_categories definition in locale.cc
Definition at line 99 of file locale_classes.h.
const category std::locale::messages [static]
Category values. The standard category values are none, ctype, numeric, collate, time,
monetary, and messages. They form a bitmask that supports union and intersection. The
category all is the union of these values.
NB: Order must match _S_facet_categories definition in locale.cc
Definition at line 104 of file locale_classes.h.
const category std::locale::monetary [static]
Category values. The standard category values are none, ctype, numeric, collate, time,
monetary, and messages. They form a bitmask that supports union and intersection. The
category all is the union of these values.
NB: Order must match _S_facet_categories definition in locale.cc
Definition at line 103 of file locale_classes.h.
const category std::locale::none [static]
Category values. The standard category values are none, ctype, numeric, collate, time,
monetary, and messages. They form a bitmask that supports union and intersection. The
category all is the union of these values.
NB: Order must match _S_facet_categories definition in locale.cc
Definition at line 98 of file locale_classes.h.
const category std::locale::numeric [static]
Category values. The standard category values are none, ctype, numeric, collate, time,
monetary, and messages. They form a bitmask that supports union and intersection. The
category all is the union of these values.
NB: Order must match _S_facet_categories definition in locale.cc
Definition at line 100 of file locale_classes.h.
const category std::locale::time [static]
Category values. The standard category values are none, ctype, numeric, collate, time,
monetary, and messages. They form a bitmask that supports union and intersection. The
category all is the union of these values.
NB: Order must match _S_facet_categories definition in locale.cc
Definition at line 102 of file locale_classes.h.
Author
Generated automatically by Doxygen for libstdc++ from the source code.