std::locale::id Class Reference

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 &)

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 483 of file locale_classes.h.

Constructor & Destructor Documentation

std::locale::id::id ( )

inline

Constructor.

Definition at line 514 of file locale_classes.h.

References std::locale::has_facet, std::locale::operator=(), and std::locale::use_facet.

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.

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.

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

• locale_classes.h