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std::use_facet(3) C++ Standard Libary std::use_facet(3) NAME std::use_facet - std::use_facet Synopsis Defined in header <locale> template< class Facet > const Facet& use_facet( const std::locale& loc ); Obtains a reference to a facet implemented by loc. Parameters loc - the locale object to query Return value Returns a reference to the facet. The reference returned by this function is valid as long as any std::locale object exists that implements Facet. Exceptions std::bad_cast if std::has_facet<Facet>(loc) == false. Example Display the 3-letter currency name used by the user's preferred lo- cale // Run this code #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 See also locale set of polymorphic facets that encapsulate cultural dif- ferences (class) has_facet checks if a locale implements a specific facet (function template) http://cppreference.com 2022.07.31 std::use_facet(3)
NAME | Synopsis | Parameters | Return value | Exceptions | Example | Output: | See also
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