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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