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
32int 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