std::locale::id(3)
NAME
std::locale::id
SYNOPSIS
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 431 of file locale_classes.h.
- Public Member Functions
- size_t _M_id () const
id () - Friends
- template<typename _Facet> bool has_facet (const locale &) throw ()
class locale
class locale::_Impl
template<typename _Facet> const _Facet & use_facet (const locale &)
Constructor & Destructor Documentation
- std::locale::id::id () [inline]
- Constructor.
- Definition at line 462 of file locale_classes.h.
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.
Author
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