locale::id Class Reference
Facet ID class.
More...
List of all members.
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 &)
Detailed Description
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_classes.h.
Constructor & Destructor Documentation
Friends And Related Function Documentation
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:
-
- Returns:
- true if locale contains a facet of type Facet, else false.
Definition at line 88 of file locale_facets.tcc.
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:
-
- Returns:
- Reference to facet of type Facet.
- Exceptions:
-
Definition at line 110 of file locale_facets.tcc.
The documentation for this class was generated from the following file: