# std::locale::facet

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< cpp‎ | locale‎ | locale

Defined in header `<locale>` |  |
class locale::facet; |  |

std::locale::facet is the base class for facets. It provides a common base class so that locales could store pointers to the facets they implement in a single indexed container, and it abstracts support for facet reference counting. Whenever a facet is added to a locale, the locale increments the reference count in the facet (through an implementation-specific mechanism). Whenever a locale is destructed or modified, it decrements the reference count in each facet it no longer implements. Whenever a facet's reference count becomes zero, the locale performs delete static_cast<std::locale::facet*>(f) where `f` is the pointer to the facet.

### Member functions

(constructor) | constructs a new facet with specified reference count (protected member function)
operator= | the copy assignment operator is deleted (protected member function)
(destructor) [virtual] | the destructor is protected virtual (virtual protected member function)

### Example

| This section is incomplete Reason: no example

### See also

id | the facet index type: each facet class must declare or inherit a public static member of this type (class)

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