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// template <class charT, class traits> class basic_ios
14
15// locale imbue(const locale& loc);
16
17#include <ios>
18#include <streambuf>
19#include <cassert>
20
21#include "test_macros.h"
22#include "platform_support.h" // locale name macros
23
24struct testbuf
25 : public std::streambuf
26{
27};
28
29bool f1_called = false;
30bool f2_called = false;
31bool f3_called = false;
32
33void f1(std::ios_base::event ev, std::ios_base& stream, int index)
34{
35 if (ev == std::ios_base::imbue_event)
36 {
37 assert(!f1_called);
38 assert( f2_called);
39 assert( f3_called);
40 assert(stream.getloc().name() == LOCALE_en_US_UTF_8);
41 assert(index == 4);
42 f1_called = true;
43 }
44}
45
46void f2(std::ios_base::event ev, std::ios_base& stream, int index)
47{
48 if (ev == std::ios_base::imbue_event)
49 {
50 assert(!f1_called);
51 assert(!f2_called);
52 assert( f3_called);
53 assert(stream.getloc().name() == LOCALE_en_US_UTF_8);
54 assert(index == 5);
55 f2_called = true;
56 }
57}
58
59void f3(std::ios_base::event ev, std::ios_base& stream, int index)
60{
61 if (ev == std::ios_base::imbue_event)
62 {
63 assert(!f1_called);
64 assert(!f2_called);
65 assert(!f3_called);
66 assert(stream.getloc().name() == LOCALE_en_US_UTF_8);
67 assert(index == 6);
68 f3_called = true;
69 }
70}
71
72int main(int, char**)
73{
74 {
75 std::ios ios(0);
76 ios.register_callback(fn: f1, index: 4);
77 ios.register_callback(fn: f2, index: 5);
78 ios.register_callback(fn: f3, index: 6);
79 std::locale l = ios.imbue(std::locale(LOCALE_en_US_UTF_8));
80 assert(l.name() == std::string("C"));
81 assert(ios.getloc().name() == std::string(LOCALE_en_US_UTF_8));
82 assert(f1_called);
83 assert(f2_called);
84 assert(f3_called);
85 }
86 f1_called = false;
87 f2_called = false;
88 f3_called = false;
89 {
90 testbuf sb;
91 std::ios ios(&sb);
92 ios.register_callback(fn: f1, index: 4);
93 ios.register_callback(fn: f2, index: 5);
94 ios.register_callback(fn: f3, index: 6);
95 std::locale l = ios.imbue(std::locale(LOCALE_en_US_UTF_8));
96 assert(l.name() == std::string("C"));
97 assert(ios.getloc().name() == std::string(LOCALE_en_US_UTF_8));
98 assert(sb.getloc().name() == std::string(LOCALE_en_US_UTF_8));
99 assert(f1_called);
100 assert(f2_called);
101 assert(f3_called);
102 }
103
104 return 0;
105}
106

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