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[locale.categories.general]
# 28 Text processing library [[text]](./#text)
## 28.3 Localization library [[localization]](localization#locale.categories.general)
### 28.3.4 Standard locale categories [[locale.categories]](locale.categories#general)
#### 28.3.4.1 General [locale.categories.general]
[1](#1)
[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L1282)
Each of the standard categories includes a family of facets[.](#1.sentence-1)
Some of these implement formatting or parsing of a datum,
for use by standard or users' iostream operators << and >>,
as members put() and get(), respectively[.](#1.sentence-2)
Each such member function takes anios_base& argument whose membersflags(),precision(),
andwidth(),
specify the format of the corresponding datum ([[ios.base]](ios.base "31.5.2Class ios_­base"))[.](#1.sentence-3)
Those functions which need to use other facets call its member getloc() to retrieve the locale imbued there[.](#1.sentence-4)
Formatting facets use the character argument fill to fill out the specified width where necessary[.](#1.sentence-5)
[2](#2)
[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L1303)
The put() members make no provision for error reporting[.](#2.sentence-1)
(Any failures of the OutputIterator argument can be extracted from
the returned iterator[.](#2.sentence-2))
The get() members take an ios_base::iostate& argument
whose value they ignore,
but set to ios_base::failbit in case of a parse error[.](#2.sentence-3)
[3](#3)
[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L1311)
Within [[locale.categories]](locale.categories "28.3.4Standard locale categories") it is unspecified whether
one virtual function calls another virtual function[.](#3.sentence-1)