| std::locale::id(3) | Library Functions Manual | std::locale::id(3) |
NAME¶
std::locale::id -
Facet ID class.
SYNOPSIS¶
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¶
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 426 of file locale_classes.h.
Constructor & Destructor Documentation¶
std::locale::id::id () [inline]¶
Constructor.
Definition at line 457 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:
locale The locale to test.
Returns:
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:
locale The locale to use.
Returns:
Exceptions:
Author¶
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| 19 Jun 2018 | libstdc++ |