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 // <wchar.h>
11 
12 #include <wchar.h>
13 #include <stdarg.h>
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 // mbstate_t comes from the underlying C library; it is defined (in C99) as:
35 //    a complete object type other than an array type that can hold the conversion
36 //    state information necessary to convert between sequences of multibyte
37 //    characters and wide characters
38     mbstate_t mb = {};
39     size_t s = 0;
40     tm *tm = 0;
41     wint_t w = 0;
42     ::FILE* fp = 0;
43     ::va_list va;
44     char* ns = 0;
45     wchar_t* ws = 0;
46     ((void)mb); // Prevent unused warning
47     ((void)s); // Prevent unused warning
48     ((void)tm); // Prevent unused warning
49     ((void)w); // Prevent unused warning
50     ((void)fp); // Prevent unused warning
51     ((void)va); // Prevent unused warning
52     ((void)ns); // Prevent unused warning
53     ((void)ws); // Prevent unused warning
54     static_assert((std::is_same<decltype(fwprintf(fp, L"")), int>::value), "");
55     static_assert((std::is_same<decltype(fwscanf(fp, L"")), int>::value), "");
56     static_assert((std::is_same<decltype(swprintf(ws, s, L"")), int>::value), "");
57     static_assert((std::is_same<decltype(swscanf(L"", L"")), int>::value), "");
58     static_assert((std::is_same<decltype(vfwprintf(fp, L"", va)), int>::value), "");
59     static_assert((std::is_same<decltype(vfwscanf(fp, L"", va)), int>::value), "");
60     static_assert((std::is_same<decltype(vswprintf(ws, s, L"", va)), int>::value), "");
61     static_assert((std::is_same<decltype(vswscanf(L"", L"", va)), int>::value), "");
62     static_assert((std::is_same<decltype(fgetwc(fp)), wint_t>::value), "");
63     static_assert((std::is_same<decltype(fgetws(ws, 0, fp)), wchar_t*>::value), "");
64     static_assert((std::is_same<decltype(fputwc(L' ', fp)), wint_t>::value), "");
65     static_assert((std::is_same<decltype(fputws(L"", fp)), int>::value), "");
66     static_assert((std::is_same<decltype(fwide(fp, 0)), int>::value), "");
67     static_assert((std::is_same<decltype(getwc(fp)), wint_t>::value), "");
68     static_assert((std::is_same<decltype(putwc(L' ', fp)), wint_t>::value), "");
69     static_assert((std::is_same<decltype(ungetwc(L' ', fp)), wint_t>::value), "");
70     static_assert((std::is_same<decltype(wcstod(L"", (wchar_t**)0)), double>::value), "");
71     static_assert((std::is_same<decltype(wcstof(L"", (wchar_t**)0)), float>::value), "");
72     static_assert((std::is_same<decltype(wcstold(L"", (wchar_t**)0)), long double>::value), "");
73     static_assert((std::is_same<decltype(wcstol(L"", (wchar_t**)0, 0)), long>::value), "");
74     static_assert((std::is_same<decltype(wcstoll(L"", (wchar_t**)0, 0)), long long>::value), "");
75     static_assert((std::is_same<decltype(wcstoul(L"", (wchar_t**)0, 0)), unsigned long>::value), "");
76     static_assert((std::is_same<decltype(wcstoull(L"", (wchar_t**)0, 0)), unsigned long long>::value), "");
77     static_assert((std::is_same<decltype(wcscpy(ws, L"")), wchar_t*>::value), "");
78     static_assert((std::is_same<decltype(wcsncpy(ws, L"", s)), wchar_t*>::value), "");
79     static_assert((std::is_same<decltype(wcscat(ws, L"")), wchar_t*>::value), "");
80     static_assert((std::is_same<decltype(wcsncat(ws, L"", s)), wchar_t*>::value), "");
81     static_assert((std::is_same<decltype(wcscmp(L"", L"")), int>::value), "");
82     static_assert((std::is_same<decltype(wcscoll(L"", L"")), int>::value), "");
83     static_assert((std::is_same<decltype(wcsncmp(L"", L"", s)), int>::value), "");
84     static_assert((std::is_same<decltype(wcsxfrm(ws, L"", s)), size_t>::value), "");
85     static_assert((std::is_same<decltype(wcschr((wchar_t*)0, L' ')), wchar_t*>::value), "");
86     static_assert((std::is_same<decltype(wcscspn(L"", L"")), size_t>::value), "");
87     static_assert((std::is_same<decltype(wcslen(L"")), size_t>::value), "");
88     static_assert((std::is_same<decltype(wcspbrk((wchar_t*)0, L"")), wchar_t*>::value), "");
89     static_assert((std::is_same<decltype(wcsrchr((wchar_t*)0, L' ')), wchar_t*>::value), "");
90     static_assert((std::is_same<decltype(wcsspn(L"", L"")), size_t>::value), "");
91     static_assert((std::is_same<decltype(wcsstr((wchar_t*)0, L"")), wchar_t*>::value), "");
92     static_assert((std::is_same<decltype(wcstok(ws, L"", (wchar_t**)0)), wchar_t*>::value), "");
93     static_assert((std::is_same<decltype(wmemchr((wchar_t*)0, L' ', s)), wchar_t*>::value), "");
94     static_assert((std::is_same<decltype(wmemcmp(L"", L"", s)), int>::value), "");
95     static_assert((std::is_same<decltype(wmemcpy(ws, L"", s)), wchar_t*>::value), "");
96     static_assert((std::is_same<decltype(wmemmove(ws, L"", s)), wchar_t*>::value), "");
97     static_assert((std::is_same<decltype(wmemset(ws, L' ', s)), wchar_t*>::value), "");
98     static_assert((std::is_same<decltype(wcsftime(ws, s, L"", tm)), size_t>::value), "");
99     static_assert((std::is_same<decltype(btowc(0)), wint_t>::value), "");
100     static_assert((std::is_same<decltype(wctob(w)), int>::value), "");
101     static_assert((std::is_same<decltype(mbsinit(&mb)), int>::value), "");
102     static_assert((std::is_same<decltype(mbrlen("", s, &mb)), size_t>::value), "");
103     static_assert((std::is_same<decltype(mbrtowc(ws, "", s, &mb)), size_t>::value), "");
104     static_assert((std::is_same<decltype(wcrtomb(ns, L' ', &mb)), size_t>::value), "");
105     static_assert((std::is_same<decltype(mbsrtowcs(ws, (const char**)0, s, &mb)), size_t>::value), "");
106     static_assert((std::is_same<decltype(wcsrtombs(ns, (const wchar_t**)0, s, &mb)), size_t>::value), "");
107 
108     // These tests fail on systems whose C library doesn't provide a correct overload
109     // set for wcschr, wcspbrk, wcsrchr, wcsstr, and wmemchr, unless the compiler is
110     // a suitably recent version of Clang.
111 #if !defined(__APPLE__) || defined(_LIBCPP_PREFERRED_OVERLOAD)
112     static_assert((std::is_same<decltype(wcschr((const wchar_t*)0, L' ')), const wchar_t*>::value), "");
113     static_assert((std::is_same<decltype(wcspbrk((const wchar_t*)0, L"")), const wchar_t*>::value), "");
114     static_assert((std::is_same<decltype(wcsrchr((const wchar_t*)0, L' ')), const wchar_t*>::value), "");
115     static_assert((std::is_same<decltype(wcsstr((const wchar_t*)0, L"")), const wchar_t*>::value), "");
116     static_assert((std::is_same<decltype(wmemchr((const wchar_t*)0, L' ', s)), const wchar_t*>::value), "");
117 #endif
118 
119 #ifndef _LIBCPP_HAS_NO_STDIN
120     static_assert((std::is_same<decltype(getwchar()), wint_t>::value), "");
121     static_assert((std::is_same<decltype(vwscanf(L"", va)), int>::value), "");
122     static_assert((std::is_same<decltype(wscanf(L"")), int>::value), "");
123 #endif
124 
125 #ifndef _LIBCPP_HAS_NO_STDOUT
126     static_assert((std::is_same<decltype(putwchar(L' ')), wint_t>::value), "");
127     static_assert((std::is_same<decltype(vwprintf(L"", va)), int>::value), "");
128     static_assert((std::is_same<decltype(wprintf(L"")), int>::value), "");
129 #endif
130 }
131