std::locale::id Class Reference [Locales]

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. More...

List of all members.

Public Member Functions

• id ()
• size_t _M_id () const throw ()

Friends

• template<typename _Facet > bool has_facet (const locale &) throw ()
• class locale
• class locale::_Impl
• template<typename _Facet > const _Facet & use_facet (const locale &)

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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 437 of file locale_classes.h.

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Constructor & Destructor Documentation

std::locale::id::id

(

)

[inline]

Constructor.

Definition at line 468 of file locale_classes.h.

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Friends And Related Function Documentation

template<typename _Facet >

bool has_facet

(

const locale &

)

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.

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.

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.

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The documentation for this class was generated from the following file:

• locale_classes.h