1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <locale> 11 12 // template <class Facet> const Facet& use_facet(const locale& loc); 13 14 #include <locale> 15 #include <cassert> 16 17 #include "test_macros.h" 18 19 int facet_count = 0; 20 21 struct my_facet 22 : public std::locale::facet 23 { 24 static std::locale::id id; 25 26 bool im_alive; 27 28 my_facet() : im_alive(true) {++facet_count;} 29 ~my_facet() {im_alive = false; --facet_count;} 30 }; 31 32 std::locale::id my_facet::id; 33 34 int main() 35 { 36 #ifndef TEST_HAS_NO_EXCEPTIONS 37 try 38 { 39 const my_facet& f = std::use_facet<my_facet>(std::locale()); 40 ((void)f); // Prevent unused warning 41 assert(false); 42 } 43 catch (std::bad_cast&) 44 { 45 } 46 #endif 47 const my_facet* fp = 0; 48 { 49 std::locale loc(std::locale(), new my_facet); 50 const my_facet& f = std::use_facet<my_facet>(loc); 51 assert(f.im_alive); 52 fp = &f; 53 assert(fp->im_alive); 54 assert(facet_count == 1); 55 } 56 assert(facet_count == 0); 57 } 58
