HP C++ User Documentation


facets (3C++std) - Tru64 UNIX

Standard C++ Library
Copyright 1996, Rogue Wave Software, Inc.


  facets - Family of classes used to encapsulate categories of locale


  The Standard C++ Localization library provides a locale interface that
  contains a collection of diverse facets.  Each facet provides 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,
  numeric      numpunct, numpunct_byname, num_put, num_get
  time         time_put, time_put_byname, time_get,
  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.


  locale, specific facet reference sections


  ANSI X3J16/ISO WG21 Joint C++ Committee
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