26 Localization library [localization]

26.3 Locales [locales]

26.3.1 Class locale [locale]

26.3.1.5 Static members [locale.statics]

static locale global(const locale& loc);
Sets the global locale to its argument.
Effects: Causes future calls to the constructor locale() to return a copy of the argument.
If the argument has a name, does
setlocale(LC_ALL, loc.name().c_str());
otherwise, the effect on the C locale, if any, is implementation-defined.
No library function other than locale​::​global() shall affect the value returned by locale().
[Note
:
See [c.locales] for data race considerations when setlocale is invoked.
end note
]
Returns: The previous value of locale().
static const locale& classic();
The "C" locale.
Returns: A locale that implements the classic "C" locale semantics, equivalent to the value locale("C").
Remarks: This locale, its facets, and their member functions, do not change with time.