man std::locale_id (Fonctions bibliothèques) - Facet ID class.
NAME
std::locale::id - Facet ID class.
SYNOPSIS
#include <locale>
Public Member Functions
id ()
Constructor.
size_t M_id () const
Private Attributes
size_t M_index
Static Private Attributes
static Atomic_word S_refcount
Friends
class locale
class locale::Impl
template<typename Facet> const Facet & use_facet (const locale &)
Return a facet.
template<typename Facet> bool has_facet (const locale &) throw ()
Test for the presence of a facet.
Detailed Description
Facet ID class.
The ID class provides facets with an index used to identify them. Every facet class must define a public static member locale::id, or be derived from a facet that provides this member, otherwise the facet cannot be used in a locale. The locale::id ensures that each class type gets a unique identifier.
Definition at line 434 of file locale.
Constructor & Destructor Documentation
std::locale::id::id () [inline]
Constructor.
Definition at line 465 of file locale.
Friends And Related Function Documentation
template<typename Facet> bool has_facet (const locale & __loc) throw () [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.
Parameters:
Facet The facet type to test the presence of.
locale The locale to test.
Returns: true if locale contains a facet of type Facet, else false.
Definition at line 85 of file locale_facets.tcc.
template<typename Facet> const Facet& use_facet (const locale & __loc) [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.
Parameters:
Facet The facet type to access.
locale The locale to use.
Returns: Reference to facet of type Facet.
Exceptions: std::bad_cast if locale doesn't contain a facet of type Facet.
Definition at line 107 of file locale_facets.tcc.
Author
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