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// <codecvt>
10
11// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_CODECVT
12
13// template <class Elem, unsigned long Maxcode = 0x10ffff,
14// codecvt_mode Mode = (codecvt_mode)0>
15// class codecvt_utf8
16// : public codecvt<Elem, char, mbstate_t>
17// {
18// // unspecified
19// };
20
21// int max_length() const throw();
22
23#include <codecvt>
24#include <cassert>
25
26#include "test_macros.h"
27
28template <class CharT, std::size_t = sizeof(CharT)>
29struct TestHelper;
30
31template <class CharT>
32struct TestHelper<CharT, 2> {
33 static void test();
34};
35
36template <class CharT>
37struct TestHelper<CharT, 4> {
38 static void test();
39};
40
41template <class CharT>
42void TestHelper<CharT, 2>::test() {
43 {
44 typedef std::codecvt_utf8<CharT> C;
45 C c;
46 int r = c.max_length();
47 assert(r == 3);
48 }
49 {
50 typedef std::codecvt_utf8<CharT, 0xFFFFFFFF, std::consume_header> C;
51 C c;
52 int r = c.max_length();
53 assert(r == 6);
54 }
55}
56
57template <class CharT>
58void TestHelper<CharT, 4>::test() {
59 {
60 typedef std::codecvt_utf8<CharT> C;
61 C c;
62 int r = c.max_length();
63 assert(r == 4);
64 }
65 {
66 typedef std::codecvt_utf8<CharT, 0xFFFFFFFF, std::consume_header> C;
67 C c;
68 int r = c.max_length();
69 assert(r == 7);
70 }
71}
72
73int main(int, char**) {
74#ifndef TEST_HAS_NO_WIDE_CHARACTERS
75 TestHelper<wchar_t>::test();
76#endif
77 TestHelper<char16_t>::test();
78 TestHelper<char32_t>::test();
79 return 0;
80}
81

source code of libcxx/test/std/localization/locale.stdcvt/codecvt_utf8_max_length.pass.cpp