std::use_facet

From Cppreference

Obtains a reference to a facet implemented by loc.

[edit] Parameters

[edit] Return value

Returns a reference the facet. The reference returned by this function is valid as long as any std::locale object exists that implements Facet.

[edit] Exceptions

std::bad_cast if std::has_facet<Facet>(loc) == false.

[edit] Example

Display the 3-letter currency name used by the user's preferred locale

#include <iostream>
#include <locale>
int main()
{
    std::locale loc = std::locale(""); // user's preferred locale
    std::cout << "Your currency string is "
              << std::use_facet<std::moneypunct<char, true>>(loc).curr_symbol() << '\n';

Output:

Your currency string is USD

[edit] See also