#include <locale_classes.h>
Public Member Functions | |
id () | |
Constructor. | |
Friends | |
template<typename Facet> const Facet & | use_facet (const locale &) |
Return a facet. | |
template<typename Facet> bool | has_facet (const locale &) throw () |
Test for the presence of a facet. |
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.
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Constructor. Definition at line 465 of file locale_classes.h. |
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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.
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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.
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