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
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 
28 template <class CharT, size_t = sizeof(CharT)>
29 struct TestHelper;
30 
31 template <class CharT>
32 struct TestHelper<CharT, 2> {
33   static void test();
34 };
35 
36 template <class CharT>
37 struct TestHelper<CharT, 4> {
38   static void test();
39 };
40 
41 template <class CharT>
42 void 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 
57 template <class CharT>
58 void 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 
73 int 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