static locale global(const locale& loc);

Effects: Sets the global locale to its argument.

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.

Returns: The previous value of locale().

Remarks: No library function other than locale​::​global() affects the value returned by locale().

static const locale& classic();

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.