[locale.id]

# 28 Text processing library [[text]](./#text)

## 28.3 Localization library [[localization]](localization#locale.id)

### 28.3.3 Locales [[locales]](locales#locale.id)

#### 28.3.3.1 Class locale [[locale]](locale#id)

#### 28.3.3.1.2 Types [[locale.types]](locale.types#locale.id)

#### 28.3.3.1.2.3 Class locale​::​id [locale.id]

[🔗](#lib:locale,id)

namespace std {class locale::id {public: id(); void operator=(const id&) = delete;
 id(const id&) = delete; };}

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L840)

The class locale​::​id provides
identification of a locale facet interface,
used as an index for lookup and to encapsulate initialization[.](#1.sentence-1)

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L845)

[*Note [1](#note-1)*:

Because facets are used by iostreams,
potentially while static constructors are running,
their initialization cannot depend on programmed static initialization[.](#2.sentence-1)

One initialization strategy is for locale to initialize each facet's id member
the first time an instance of the facet is installed into a locale[.](#2.sentence-2)

This depends only on static storage being zero
before constructors run ([[basic.start.static]](basic.start.static "6.10.3.2 Static initialization"))[.](#2.sentence-3)

— *end note*]