libstdc++: std::locale::id Class Reference (original) (raw)
#include <[locale_classes.h](a00587%5Fsource.html)>
| Public Member Functions | |
|---|---|
| id () | |
| size_t | _M_id () const throw () |
| Friends | |
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| template<typename _Facet > | |
| const _Facet * | __try_use_facet (const locale &) noexcept |
| template<typename _Facet > | |
| bool | has_facet (const locale &) throw () |
| class | locale |
| class | locale::_Impl |
| template<typename _Facet > | |
| const _Facet & | use_facet (const locale &) |
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 508 of file locale_classes.h.
| std::locale::id::id ( ) | inline |
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◆ __try_use_facet
template<typename _Facet >
| const _Facet * __try_use_facet ( const locale & __loc) | friend |
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◆ has_facet
template<typename _Facet >
| bool has_facet ( const locale & ) throw ( ) | friend |
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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.
Template Parameters
| _Facet | The facet type to test the presence of. |
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Parameters
Returns
true if __loc contains a facet of type _Facet, else false.
Definition at line 178 of file locale_classes.tcc.
◆ locale
◆ locale::_Impl
| friend class locale::_Impl | friend |
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◆ use_facet
template<typename _Facet >
| const _Facet & use_facet ( const locale & ) | friend |
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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.
Template Parameters
| _Facet | The facet type to access. |
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Parameters
Returns
Reference to facet of type Facet.
Exceptions
| std::bad_cast | if __loc doesn't contain a facet of type _Facet. |
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Definition at line 208 of file locale_classes.tcc.
The documentation for this class was generated from the following file: