## facets

    Localization classes

- Summary
- Data Type and Member Function Indexes
- Description
- See Also

### Summary

A family of classes used to encapsulate categories of locale functionality.

### Data Type and Member Function Indexes
(exclusive of constructors and destructors)

None

### Description

The Standard C++ Localization library includes a locale interface that contains a collection of diverse facets. Each facet has localization facilities for some specific area, such as character classification or numeric formatting. Each facet also falls into one or more broad categories. These categories are defined in the locale class, and the standard facets fit into these categories as follows.

####

Category | Facets
--- | ---
`collate` | `collate, collate_byname`
`ctype` | `ctype, codecvt, ctype_byname, codecvt_byname`
`monetary` | `moneypunct, moneypunct_byname, money_put, money_get`
`numeric` | `numpunct, numpunct_byname, num_put, num_get`
`time` | `time_put, time_put_byname, time_get, time_get_byname`
`messages` | `messages, messages_byname`

A facet must satisfy two properties. First, it must be derived from the base class `locale::facet`, either directly or indirectly (for example, `facet -> ctype<char> -> my_ctype`). Second, it must contain a member of type `locale::id`. This ensures that the locale class can manage its collection of facets properly.

### See Also

locale, specific facet reference sections

Copyright (c) 1998, Rogue Wave Software, Inc.
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OEM Release, June 1998