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// REQUIRES: locale.en_US.UTF-8
10
11// <ios>
12
13// class ios_base
14
15// locale imbue(const locale& loc);
16
17#include <ios>
18#include <string>
19#include <locale>
20#include <cassert>
21
22#include "test_macros.h"
23#include "platform_support.h" // locale name macros
24
25class test
26 : public std::ios
27{
28public:
29 test()
30 {
31 init(sb: 0);
32 }
33};
34
35bool f1_called = false;
36bool f2_called = false;
37bool f3_called = false;
38
39void f1(std::ios_base::event ev, std::ios_base& stream, int index)
40{
41 if (ev == std::ios_base::imbue_event)
42 {
43 assert(!f1_called);
44 assert( f2_called);
45 assert( f3_called);
46 assert(stream.getloc().name() == LOCALE_en_US_UTF_8);
47 assert(index == 4);
48 f1_called = true;
49 }
50}
51
52void f2(std::ios_base::event ev, std::ios_base& stream, int index)
53{
54 if (ev == std::ios_base::imbue_event)
55 {
56 assert(!f1_called);
57 assert(!f2_called);
58 assert( f3_called);
59 assert(stream.getloc().name() == LOCALE_en_US_UTF_8);
60 assert(index == 5);
61 f2_called = true;
62 }
63}
64
65void f3(std::ios_base::event ev, std::ios_base& stream, int index)
66{
67 if (ev == std::ios_base::imbue_event)
68 {
69 assert(!f1_called);
70 assert(!f2_called);
71 assert(!f3_called);
72 assert(stream.getloc().name() == LOCALE_en_US_UTF_8);
73 assert(index == 6);
74 f3_called = true;
75 }
76}
77
78int main(int, char**)
79{
80 test t;
81 std::ios_base& b = t;
82 b.register_callback(fn: f1, index: 4);
83 b.register_callback(fn: f2, index: 5);
84 b.register_callback(fn: f3, index: 6);
85 std::locale l = b.imbue(std::locale(LOCALE_en_US_UTF_8));
86 assert(l.name() == std::string("C"));
87 assert(b.getloc().name() == std::string(LOCALE_en_US_UTF_8));
88 assert(f1_called);
89 assert(f2_called);
90 assert(f3_called);
91
92 return 0;
93}
94

source code of libcxx/test/std/input.output/iostreams.base/ios.base/ios.base.locales/imbue.pass.cpp