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#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
48#  include <__cxx03/wctype.h>
49#else
50#  include <__config>
51
52#  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
53#    pragma GCC system_header
54#  endif
55
56// TODO:
57// In the future, we should unconditionally include_next <wctype.h> here and instead
58// have a mode under which the library does not need libc++'s <wctype.h> or <cwctype>
59// at all (i.e. a mode without wchar_t). As it stands, we need to do that to completely
60// bypass the using declarations in <cwctype> when we did not include <wctype.h>.
61// Otherwise, a using declaration like `using ::wint_t` in <cwctype> will refer to
62// nothing (with using_if_exists), and if we include another header that defines one
63// of these declarations (e.g. <wchar.h>), the second `using ::wint_t` with using_if_exists
64// will fail because it does not refer to the same declaration.
65#  if __has_include_next(<wctype.h>)
66#    include_next <wctype.h>
67#    define _LIBCPP_INCLUDED_C_LIBRARY_WCTYPE_H
68#  endif
69
70#  ifdef __cplusplus
71
72#    undef iswalnum
73#    undef iswalpha
74#    undef iswblank
75#    undef iswcntrl
76#    undef iswdigit
77#    undef iswgraph
78#    undef iswlower
79#    undef iswprint
80#    undef iswpunct
81#    undef iswspace
82#    undef iswupper
83#    undef iswxdigit
84#    undef iswctype
85#    undef wctype
86#    undef towlower
87#    undef towupper
88#    undef towctrans
89#    undef wctrans
90
91#  endif // __cplusplus
92#endif   // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
93
94#endif // _LIBCPP_WCTYPE_H