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// XFAIL: availability-char8_t_support-missing
10
11// This test runs in C++20, but we have deprecated codecvt<char(16|32), char, mbstate_t> in C++20.
12// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
13
14// <locale>
15
16// template <class Facet> locale combine(const locale& other) const;
17
18#include <locale>
19#include <stdexcept>
20#include <cassert>
21
22#include "count_new.h"
23
24#include "test_macros.h"
25
26template<class CharT>
27void check_for(const std::locale& loc)
28{
29 assert(std::has_facet<std::collate<CharT> >(loc));
30
31 assert(std::has_facet<std::ctype<CharT> >(loc));
32
33 assert((std::has_facet<std::codecvt<CharT, char, std::mbstate_t> >(loc)));
34
35 assert(std::has_facet<std::moneypunct<CharT> >(loc));
36 assert(std::has_facet<std::money_get<CharT> >(loc));
37 assert(std::has_facet<std::money_put<CharT> >(loc));
38
39 assert(std::has_facet<std::numpunct<CharT> >(loc));
40 assert(std::has_facet<std::num_get<CharT> >(loc));
41 assert(std::has_facet<std::num_put<CharT> >(loc));
42
43 assert(std::has_facet<std::time_get<CharT> >(loc));
44 assert(std::has_facet<std::time_put<CharT> >(loc));
45
46 assert(std::has_facet<std::messages<CharT> >(loc));
47}
48
49void check(const std::locale& loc)
50{
51 check_for<char>(loc);
52#ifndef TEST_HAS_NO_WIDE_CHARACTERS
53 check_for<wchar_t>(loc);
54#endif
55
56 assert((std::has_facet<std::codecvt<char16_t, char, std::mbstate_t> >(loc)));
57 assert((std::has_facet<std::codecvt<char32_t, char, std::mbstate_t> >(loc)));
58#if TEST_STD_VER > 17
59 assert((std::has_facet<std::codecvt<char16_t, char8_t, std::mbstate_t> >(loc)));
60 assert((std::has_facet<std::codecvt<char32_t, char8_t, std::mbstate_t> >(loc)));
61#endif
62}
63
64struct my_facet
65 : public std::locale::facet
66{
67 int test() const {return 5;}
68
69 static std::locale::id id;
70};
71
72std::locale::id my_facet::id;
73
74int main(int, char**)
75{
76{
77 globalMemCounter.reset();
78 {
79 std::locale loc;
80 std::locale loc2(loc, new my_facet);
81 std::locale loc3 = loc.combine<my_facet>(other: loc2);
82 check(loc: loc3);
83 assert(loc3.name() == "*");
84 assert((std::has_facet<my_facet>(loc3)));
85 const my_facet& f = std::use_facet<my_facet>(loc: loc3);
86 assert(f.test() == 5);
87 }
88 assert(globalMemCounter.checkOutstandingNewEq(0));
89}
90#ifndef TEST_HAS_NO_EXCEPTIONS
91{
92 {
93 std::locale loc;
94 std::locale loc2;
95 try
96 {
97 std::locale loc3 = loc.combine<my_facet>(other: loc2);
98 assert(false);
99 }
100 catch (std::runtime_error&)
101 {
102 }
103 }
104 assert(globalMemCounter.checkOutstandingNewEq(0));
105}
106#endif
107
108 return 0;
109}
110

source code of libcxx/test/std/localization/locales/locale/locale.members/combine.pass.cpp