1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP_WCTYPE_H
11#define _LIBCPP_WCTYPE_H
12
13/*
14    wctype.h synopsis
15
16Macros:
17
18    WEOF
19
20Types:
21
22    wint_t
23    wctrans_t
24    wctype_t
25
26int iswalnum(wint_t wc);
27int iswalpha(wint_t wc);
28int iswblank(wint_t wc);  // C99
29int iswcntrl(wint_t wc);
30int iswdigit(wint_t wc);
31int iswgraph(wint_t wc);
32int iswlower(wint_t wc);
33int iswprint(wint_t wc);
34int iswpunct(wint_t wc);
35int iswspace(wint_t wc);
36int iswupper(wint_t wc);
37int iswxdigit(wint_t wc);
38int iswctype(wint_t wc, wctype_t desc);
39wctype_t wctype(const char* property);
40wint_t towlower(wint_t wc);
41wint_t towupper(wint_t wc);
42wint_t towctrans(wint_t wc, wctrans_t desc);
43wctrans_t wctrans(const char* property);
44
45*/
46
47#include <__config>
48
49#if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS)
50#   error "The <wctype.h> header is not supported since libc++ has been configured with LIBCXX_ENABLE_WIDE_CHARACTERS disabled"
51#endif
52
53#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
54#  pragma GCC system_header
55#endif
56
57// TODO:
58// In the future, we should unconditionally include_next <wctype.h> here and instead
59// have a mode under which the library does not need libc++'s <wctype.h> or <cwctype>
60// at all (i.e. a mode without wchar_t). As it stands, we need to do that to completely
61// bypass the using declarations in <cwctype> when we did not include <wctype.h>.
62// Otherwise, a using declaration like `using ::wint_t` in <cwctype> will refer to
63// nothing (with using_if_exists), and if we include another header that defines one
64// of these declarations (e.g. <wchar.h>), the second `using ::wint_t` with using_if_exists
65// will fail because it does not refer to the same declaration.
66#if __has_include_next(<wctype.h>)
67#   include_next <wctype.h>
68#   define _LIBCPP_INCLUDED_C_LIBRARY_WCTYPE_H
69#endif
70
71#ifdef __cplusplus
72
73#undef iswalnum
74#undef iswalpha
75#undef iswblank
76#undef iswcntrl
77#undef iswdigit
78#undef iswgraph
79#undef iswlower
80#undef iswprint
81#undef iswpunct
82#undef iswspace
83#undef iswupper
84#undef iswxdigit
85#undef iswctype
86#undef wctype
87#undef towlower
88#undef towupper
89#undef towctrans
90#undef wctrans
91
92#endif // __cplusplus
93
94#endif // _LIBCPP_WCTYPE_H
95