1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <cwchar>
11 
12 #include <cwchar>
13 #include <cstdarg>
14 #include <type_traits>
15 
16 #ifndef NULL
17 #error NULL not defined
18 #endif
19 
20 #ifndef WCHAR_MAX
21 #error WCHAR_MAX not defined
22 #endif
23 
24 #ifndef WCHAR_MIN
25 #error WCHAR_MIN not defined
26 #endif
27 
28 #ifndef WEOF
29 #error WEOF not defined
30 #endif
31 
main()32 int main()
33 {
34     std::mbstate_t mb = {};
35     std::size_t s = 0;
36     std::tm *tm = 0;
37     std::wint_t w = 0;
38     ::FILE* fp = 0;
39     std::va_list va;
40 
41     char* ns = 0;
42     wchar_t* ws = 0;
43 
44     ((void)mb); // Prevent unused warning
45     ((void)s); // Prevent unused warning
46     ((void)tm); // Prevent unused warning
47     ((void)w); // Prevent unused warning
48     ((void)fp); // Prevent unused warning
49     ((void)va); // Prevent unused warning
50     ((void)ns); // Prevent unused warning
51     ((void)ws); // Prevent unused warning
52 
53     static_assert((std::is_same<decltype(std::fwprintf(fp, L"")), int>::value), "");
54     static_assert((std::is_same<decltype(std::fwscanf(fp, L"")), int>::value), "");
55     static_assert((std::is_same<decltype(std::swprintf(ws, s, L"")), int>::value), "");
56     static_assert((std::is_same<decltype(std::swscanf(L"", L"")), int>::value), "");
57     static_assert((std::is_same<decltype(std::vfwprintf(fp, L"", va)), int>::value), "");
58     static_assert((std::is_same<decltype(std::vfwscanf(fp, L"", va)), int>::value), "");
59     static_assert((std::is_same<decltype(std::vswprintf(ws, s, L"", va)), int>::value), "");
60     static_assert((std::is_same<decltype(std::vswscanf(L"", L"", va)), int>::value), "");
61     static_assert((std::is_same<decltype(std::fgetwc(fp)), std::wint_t>::value), "");
62     static_assert((std::is_same<decltype(std::fgetws(ws, 0, fp)), wchar_t*>::value), "");
63     static_assert((std::is_same<decltype(std::fputwc(L' ', fp)), std::wint_t>::value), "");
64     static_assert((std::is_same<decltype(std::fputws(L"", fp)), int>::value), "");
65     static_assert((std::is_same<decltype(std::fwide(fp, 0)), int>::value), "");
66     static_assert((std::is_same<decltype(std::getwc(fp)), std::wint_t>::value), "");
67     static_assert((std::is_same<decltype(std::putwc(L' ', fp)), std::wint_t>::value), "");
68     static_assert((std::is_same<decltype(std::ungetwc(L' ', fp)), std::wint_t>::value), "");
69     static_assert((std::is_same<decltype(std::wcstod(L"", (wchar_t**)0)), double>::value), "");
70     static_assert((std::is_same<decltype(std::wcstof(L"", (wchar_t**)0)), float>::value), "");
71     static_assert((std::is_same<decltype(std::wcstold(L"", (wchar_t**)0)), long double>::value), "");
72     static_assert((std::is_same<decltype(std::wcstol(L"", (wchar_t**)0, 0)), long>::value), "");
73     static_assert((std::is_same<decltype(std::wcstoll(L"", (wchar_t**)0, 0)), long long>::value), "");
74     static_assert((std::is_same<decltype(std::wcstoul(L"", (wchar_t**)0, 0)), unsigned long>::value), "");
75     static_assert((std::is_same<decltype(std::wcstoull(L"", (wchar_t**)0, 0)), unsigned long long>::value), "");
76     static_assert((std::is_same<decltype(std::wcscpy(ws, L"")), wchar_t*>::value), "");
77     static_assert((std::is_same<decltype(std::wcsncpy(ws, L"", s)), wchar_t*>::value), "");
78     static_assert((std::is_same<decltype(std::wcscat(ws, L"")), wchar_t*>::value), "");
79     static_assert((std::is_same<decltype(std::wcsncat(ws, L"", s)), wchar_t*>::value), "");
80     static_assert((std::is_same<decltype(std::wcscmp(L"", L"")), int>::value), "");
81     static_assert((std::is_same<decltype(std::wcscoll(L"", L"")), int>::value), "");
82     static_assert((std::is_same<decltype(std::wcsncmp(L"", L"", s)), int>::value), "");
83     static_assert((std::is_same<decltype(std::wcsxfrm(ws, L"", s)), std::size_t>::value), "");
84     static_assert((std::is_same<decltype(std::wcschr((wchar_t*)0, L' ')), wchar_t*>::value), "");
85     static_assert((std::is_same<decltype(std::wcscspn(L"", L"")), std::size_t>::value), "");
86     static_assert((std::is_same<decltype(std::wcslen(L"")), std::size_t>::value), "");
87     static_assert((std::is_same<decltype(std::wcspbrk((wchar_t*)0, L"")), wchar_t*>::value), "");
88     static_assert((std::is_same<decltype(std::wcsrchr((wchar_t*)0, L' ')), wchar_t*>::value), "");
89     static_assert((std::is_same<decltype(std::wcsspn(L"", L"")), std::size_t>::value), "");
90     static_assert((std::is_same<decltype(std::wcsstr((wchar_t*)0, L"")), wchar_t*>::value), "");
91     static_assert((std::is_same<decltype(std::wcstok(ws, L"", (wchar_t**)0)), wchar_t*>::value), "");
92     static_assert((std::is_same<decltype(std::wmemchr((wchar_t*)0, L' ', s)), wchar_t*>::value), "");
93     static_assert((std::is_same<decltype(std::wmemcmp(L"", L"", s)), int>::value), "");
94     static_assert((std::is_same<decltype(std::wmemcpy(ws, L"", s)), wchar_t*>::value), "");
95     static_assert((std::is_same<decltype(std::wmemmove(ws, L"", s)), wchar_t*>::value), "");
96     static_assert((std::is_same<decltype(std::wmemset(ws, L' ', s)), wchar_t*>::value), "");
97     static_assert((std::is_same<decltype(std::wcsftime(ws, s, L"", tm)), std::size_t>::value), "");
98     static_assert((std::is_same<decltype(std::btowc(0)), wint_t>::value), "");
99     static_assert((std::is_same<decltype(std::wctob(w)), int>::value), "");
100     static_assert((std::is_same<decltype(std::mbsinit(&mb)), int>::value), "");
101     static_assert((std::is_same<decltype(std::mbrlen("", s, &mb)), std::size_t>::value), "");
102     static_assert((std::is_same<decltype(std::mbrtowc(ws, "", s, &mb)), std::size_t>::value), "");
103     static_assert((std::is_same<decltype(std::wcrtomb(ns, L' ', &mb)), std::size_t>::value), "");
104     static_assert((std::is_same<decltype(std::mbsrtowcs(ws, (const char**)0, s, &mb)), std::size_t>::value), "");
105     static_assert((std::is_same<decltype(std::wcsrtombs(ns, (const wchar_t**)0, s, &mb)), std::size_t>::value), "");
106 
107     // These tests fail on systems whose C library doesn't provide a correct overload
108     // set for wcschr, wcspbrk, wcsrchr, wcsstr, and wmemchr, unless the compiler is
109     // a suitably recent version of Clang.
110 #if !defined(__APPLE__) || defined(_LIBCPP_PREFERRED_OVERLOAD)
111     static_assert((std::is_same<decltype(std::wcschr((const wchar_t*)0, L' ')), const wchar_t*>::value), "");
112     static_assert((std::is_same<decltype(std::wcspbrk((const wchar_t*)0, L"")), const wchar_t*>::value), "");
113     static_assert((std::is_same<decltype(std::wcsrchr((const wchar_t*)0, L' ')), const wchar_t*>::value), "");
114     static_assert((std::is_same<decltype(std::wcsstr((const wchar_t*)0, L"")), const wchar_t*>::value), "");
115     static_assert((std::is_same<decltype(std::wmemchr((const wchar_t*)0, L' ', s)), const wchar_t*>::value), "");
116 #endif
117 
118 #ifndef _LIBCPP_HAS_NO_STDIN
119     static_assert((std::is_same<decltype(std::getwchar()), std::wint_t>::value), "");
120     static_assert((std::is_same<decltype(std::vwscanf(L"", va)), int>::value), "");
121     static_assert((std::is_same<decltype(std::wscanf(L"")), int>::value), "");
122 #endif
123 
124 #ifndef _LIBCPP_HAS_NO_STDOUT
125     static_assert((std::is_same<decltype(std::putwchar(L' ')), std::wint_t>::value), "");
126     static_assert((std::is_same<decltype(std::vwprintf(L"", va)), int>::value), "");
127     static_assert((std::is_same<decltype(std::wprintf(L"")), int>::value), "");
128 #endif
129 }
130