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 
16 Macros:
17 
18     WEOF
19 
20 Types:
21 
22     wint_t
23     wctrans_t
24     wctype_t
25 
26 int iswalnum(wint_t wc);
27 int iswalpha(wint_t wc);
28 int iswblank(wint_t wc);  // C99
29 int iswcntrl(wint_t wc);
30 int iswdigit(wint_t wc);
31 int iswgraph(wint_t wc);
32 int iswlower(wint_t wc);
33 int iswprint(wint_t wc);
34 int iswpunct(wint_t wc);
35 int iswspace(wint_t wc);
36 int iswupper(wint_t wc);
37 int iswxdigit(wint_t wc);
38 int iswctype(wint_t wc, wctype_t desc);
39 wctype_t wctype(const char* property);
40 wint_t towlower(wint_t wc);
41 wint_t towupper(wint_t wc);
42 wint_t towctrans(wint_t wc, wctrans_t desc);
43 wctrans_t wctrans(const char* property);
44 
45 */
46 
47 #include <__config>
48 
49 #if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS)
50 #  error                                                                                                               \
51       "The <wctype.h> header is not supported since libc++ has been configured with LIBCXX_ENABLE_WIDE_CHARACTERS disabled"
52 #endif
53 
54 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
55 #  pragma GCC system_header
56 #endif
57 
58 // TODO:
59 // In the future, we should unconditionally include_next <wctype.h> here and instead
60 // have a mode under which the library does not need libc++'s <wctype.h> or <cwctype>
61 // at all (i.e. a mode without wchar_t). As it stands, we need to do that to completely
62 // bypass the using declarations in <cwctype> when we did not include <wctype.h>.
63 // Otherwise, a using declaration like `using ::wint_t` in <cwctype> will refer to
64 // nothing (with using_if_exists), and if we include another header that defines one
65 // of these declarations (e.g. <wchar.h>), the second `using ::wint_t` with using_if_exists
66 // will fail because it does not refer to the same declaration.
67 #if __has_include_next(<wctype.h>)
68 #  include_next <wctype.h>
69 #  define _LIBCPP_INCLUDED_C_LIBRARY_WCTYPE_H
70 #endif
71 
72 #ifdef __cplusplus
73 
74 #  undef iswalnum
75 #  undef iswalpha
76 #  undef iswblank
77 #  undef iswcntrl
78 #  undef iswdigit
79 #  undef iswgraph
80 #  undef iswlower
81 #  undef iswprint
82 #  undef iswpunct
83 #  undef iswspace
84 #  undef iswupper
85 #  undef iswxdigit
86 #  undef iswctype
87 #  undef wctype
88 #  undef towlower
89 #  undef towupper
90 #  undef towctrans
91 #  undef wctrans
92 
93 #endif // __cplusplus
94 
95 #endif // _LIBCPP_WCTYPE_H
96