| 1 | //===----------------------------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | // <locale> |
| 10 | |
| 11 | // template <class Facet> const Facet& use_facet(const locale& loc); |
| 12 | |
| 13 | #include <locale> |
| 14 | #include <cassert> |
| 15 | #include <typeinfo> |
| 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(int, char**) |
| 35 | { |
| 36 | #ifndef TEST_HAS_NO_EXCEPTIONS |
| 37 | try |
| 38 | { |
| 39 | const my_facet& f = std::use_facet<my_facet>(loc: 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: 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 | return 0; |
| 59 | } |
| 60 |