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 // <locale>
10 
11 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
12 
13 // wstring_convert<Codecvt, Elem, Wide_alloc, Byte_alloc>
14 
15 // wide_string from_bytes(char byte);
16 // wide_string from_bytes(const char* ptr);
17 // wide_string from_bytes(const byte_string& str);
18 // wide_string from_bytes(const char* first, const char* last);
19 
20 // XFAIL: no-wide-characters
21 
22 #include <locale>
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 template <class CharT>
31 struct TestHelper<CharT, 2> {
32   static void test();
33 };
34 template <class CharT>
35 struct TestHelper<CharT, 4> {
36   static void test();
37 };
38 
39 template <class CharT>
40 void TestHelper<CharT, 2>::test() {
41   static_assert((std::is_same<CharT, wchar_t>::value), "");
42   {
43     std::wstring_convert<std::codecvt_utf8<CharT> > myconv;
44     std::string bs("\xE1\x80\x85");
45     std::wstring ws = myconv.from_bytes('a');
46     assert(ws == L"a");
47     ws = myconv.from_bytes(bs.c_str());
48     assert(ws == L"\u1005");
49     ws = myconv.from_bytes(bs);
50     assert(ws == L"\u1005");
51     ws = myconv.from_bytes(bs.data(), bs.data() + bs.size());
52     assert(ws == L"\u1005");
53     ws = myconv.from_bytes("");
54     assert(ws.size() == 0);
55   }
56 }
57 
58 template <class CharT>
59 void TestHelper<CharT, 4>::test() {
60   static_assert((std::is_same<CharT, wchar_t>::value), "");
61   {
62     std::wstring_convert<std::codecvt_utf8<CharT> > myconv;
63     std::string bs("\xF1\x80\x80\x83");
64     std::wstring ws = myconv.from_bytes('a');
65     assert(ws == L"a");
66     ws = myconv.from_bytes(bs.c_str());
67     assert(ws == L"\U00040003");
68     ws = myconv.from_bytes(bs);
69     assert(ws == L"\U00040003");
70     ws = myconv.from_bytes(bs.data(), bs.data() + bs.size());
71     assert(ws == L"\U00040003");
72     ws = myconv.from_bytes("");
73     assert(ws.size() == 0);
74   }
75 }
76 
77 int main(int, char**) {
78   TestHelper<wchar_t>::test();
79   return 0;
80 }
81